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Delaware

Delaware Behavioral Health Credentialing And Medicaid Enrollment

If you’re a behavioral health provider getting credentialed in Delaware, filing early can get you refused rather than queued. DMAP comes first, because since March 1, 2022 no Medicaid plan can sign you before it, and all three plans are statewide. Highmark refuses a commercial application filed more than six weeks before your start date, the rest runs on CAQH, and an MCO-only or prescriber-only DMAP enrollment has no delegate route. Here’s the sequence, the windows, and what only you can file.

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Delaware Payers And Timelines

Where The Delays Happen

Getting On A Panel Isn’t The Same As Getting Paid.

Delaware’s state review isn’t the bottleneck. DMAP publishes a 15-business-day goal. The bottleneck is order and timing. No Medicaid plan is allowed to sign you until DMAP has screened and enrolled you, and Highmark won’t accept a commercial application filed more than six weeks before your start date. Filing early doesn’t get you queued here. It gets you refused.

Credentialed›contracted›loaded›connected›payable

Three Counties, Three Medicaid Plans, And No Regions To Sort Out.

Two Tracks

Delaware is a small market with a short payer list, which sounds easy and mostly is. What catches people is a fixed sequence on one side and a filing window on the other.

Delaware Medical Assistance Program

DMAP First. The Plans Are Barred From Signing You Before It.

Delaware Medicaid runs almost entirely through managed care under the Diamond State Health Plan, a section 1115 demonstration CMS extended through December 31, 2028. Three plans serve the whole state and Delaware has no regional service areas, so you aren’t matching plans to territories.

The order isn’t negotiableSince March 1, 2022 you must be screened and enrolled with DMAP before a Delaware Medicaid plan can enter an agreement with you. The state says it in plain words. Everything starts in the DMAP Provider Portal, and you pick the application that matches how you bill: the fee-for-service application for providers who bill Delaware Medicaid directly, which also tells the plans you can be dually enrolled, the MCOP application for providers who only bill through plan contracts, and the ORP application for people who only order, refer or prescribe.
Where our delegate access stopsOnly fee-for-service and dually enrolled providers can register delegates. An MCO-only or ORP enrollment has no delegate route, so on those we prepare the file and work through it with you. A delegate can never complete a revalidation either. We say this up front rather than discovering it together in month three.
One ID per NPI, taxonomy and locationApproval issues a nine-digit Medicaid ID tied to one combination of those three. Three offices means three IDs. And a claim carrying an unregistered NPI, taxonomy or service location for a date of service after October 1, 2024 isn’t payable, which reaches prescribers who never intended to bill the state at all.
Two 60-day trapsAn application left unfinished for 60 days is denied and has to be reset from the beginning. And if you miss your assigned revalidation date, every contract under that Medicaid ID terminates on that date, including your plan network participation. DMAP mails the 60-day notice to the address on file, so that address is doing more work than it looks like. If your Medicare PECOS enrollment is current, DMMA is authorized to use your PECOS revalidation date instead.
No behavioral health carve-out, but a second agencyDelaware’s 2023 plan contracts put physical health, behavioral health and long-term services under the member’s own plan, and all three plans credential behavioral health themselves. The wrinkle is DSAMH, which certifies programs for Medicaid enrollment, sets rates, and runs PROMISE. Its manual is direct about the order: licensure and certification through DSAMH first, then DMAP. That only reaches program-level services. DSAMH’s own manual puts nurse practitioners under the NP section of the State Plan, so routine outpatient medication management sits outside it.

Commercial

Highmark Anchors Three Different Things At Once.

Highmark holds the Blue license for all of Delaware, administers State of Delaware employee medical plans alongside Aetna, and owns Highmark Health Options, the largest Medicaid plan. Those are three separate contracts inside one company, and none of them gives you the others.

The six-week windowHighmark won’t accept an initial credentialing application submitted more than six weeks before the practitioner’s start date. It’s refused, not queued. So your start date sets the filing calendar rather than being a detail we collect at the end. Highmark’s stated goal is 45 days from a complete application, and it says openly that volume and missing information stretch that.
Your CAQH stays yoursYou complete and attest your own profile. We’re added as an authorized practice manager, so we keep the practice data current during your project and get each payer authorized. After that, Credentialing Maintenance keeps it current. Highmark treats DataSpring Provider Data Portal (formerly CAQH) as the preferred route but pairs it with its own Initial Credentialing Request Form, so it is a two-part submission and sending only one half looks like nothing was sent. Optum’s Delaware page states outright that CAQH participation is required here, and Evernorth wants your CAQH ID with re-attestation every 120 days.
Behavioral health has its own door at three of themUnitedHealthcare’s is Optum, through Provider Express. Cigna’s is Evernorth. Aetna handles behavioral health itself, on the same request for participation as medical. Highmark, the three Medicaid plans and AmeriHealth Caritas Next all keep behavioral health inside the plan. Applying through the medical door where a behavioral door exists is the single most common way to lose a month in this state.
Set the region before you read anythingHighmark’s provider site also serves Pennsylvania, New York and West Virginia, and the regional guides differ. Following a Pennsylvania instruction on a Delaware application is an easy and expensive mistake.
Seeing patients in other statesDelaware sits in the Philadelphia orbit, so a New Castle County panel routinely carries Pennsylvania and New Jersey employer cards from Independence Blue Cross, Horizon and AmeriHealth New Jersey. Those members reach you through BlueCard on your Highmark Delaware contract or through the national carriers, not through a second contract in each state. The gate to a patient across the line is your license there. Medicaid is the real exception and is per state.

Who You’ll Apply To, And How Long It Usually Takes.

Delaware Commercial Payers

These are typical ranges from a complete application, drawn from what each carrier publishes. Delaware has no credentialing statute in force, so these are the carriers’ own processes. We track them rather than promise them.

Highmark Blue Cross Blue Shield Delaware

The Blue license, the state employee plan, and the biggest Medicaid plan
  • Usually: Highmark’s stated goal is 45 days from a complete application, and it says plainly that volume and missing information stretch it
  • The rule that decides your calendar: Highmark won’t accept an initial application submitted more than six weeks before the practitioner’s start date. Too early is refused, not queued. We file to the start date
  • Two-part submission: an attested DataSpring provider profile (formerly CAQH) with Highmark authorized to pull it, plus Highmark’s own Initial Credentialing Request Form. New applicants create the profile, existing ones update and re-attest
  • Behavioral health: managed inside the plan, no carve-out vendor to apply to
  • Watch: pick the Delaware region on Highmark’s provider site before reading any credentialing guide, because the same site serves Pennsylvania, New York and West Virginia

Optum Behavioral Health (UnitedHealthcare)

Initiated on Provider Express, and county-split
  • Usually: about 60 to 120 days from a complete application
  • Published green light for prescribers: MDs, DOs, PAs and RNs with prescriptive authority accepted in all counties, plus active recruiting named for telemental health, medication assisted treatment prescribers, Express Access providers who can see a member within five business days, and EAP-certified clinicians
  • Everyone else: PhDs and master’s-level clinicians are accepted in New Castle and Sussex counties only, not Kent. For a mixed prescriber and therapist group that’s a real planning constraint, and it usually surfaces after someone has already been hired
  • CAQH: Optum’s Delaware page states outright that CAQH participation is required for credentialing in this state

Separate door: Optum Behavioral Health

Aetna

Off the marketplace, still on the state employee plan
  • Usually: about 60 to 120 days from a complete file. Recredentialing generally every 36 months
  • Sequence: request for participation, network need evaluation, credentialing pulled from CAQH, then contract finalization
  • What changed: Aetna exited the individual and marketplace business in every state where it sold 2025 coverage, so it isn’t a 2026 Delaware exchange option. It’s still one of the two carriers administering State of Delaware employee medical plans, which in a state this size is a meaningful block of lives
  • Watch: behavioral health uses the same Aetna request for participation as medical

Same form: medical and behavioral health

Cigna Healthcare

Behavioral health goes through Evernorth
  • Current application route: Evernorth directs individual providers to its provider portal and publishes separate applications for clinics and facilities. Before we file, we check which provider category and network requirements apply to you.
  • Published application timing: Evernorth says the full process can take up to about 90 days. Recredentialing generally every 36 months
  • CAQH: your CAQH ID goes on Evernorth’s behavioral provider information form, with re-attestation every 120 days
  • Our read: we sequence Cigna rather than promising it first, and tell you the wait

Separate door: Evernorth Behavioral Health

AmeriHealth Caritas Next Delaware

The quiet efficiency in this market
  • Usually: not separately published, and the plan’s own instruction is the shortcut. Participating Medicaid providers don’t need to complete credentialing unless they’re due for recredentialing
  • Why that matters: if you’re already credentialed with AmeriHealth Caritas Delaware on the Medicaid side, this is a contracting step rather than a new credentialing cycle. So the Medicaid contract you were doing anyway also opens an individual-market network, in a state whose exchange is down to three carriers
  • How you start: a Provider Contract Inquiry Form rather than a full application, with your CAQH ID supplied and access granted

Ambetter Health Of Delaware

On the list, with an honest gap
  • Usually: we didn’t find a published Delaware credentialing page for the Ambetter line, so we’re not going to quote a number. We confirm the route and turnaround at the point of application
  • The question we ask rather than assume: Ambetter is Centene’s individual-market brand and Centene also runs Delaware First Health on the Medicaid side. Whether a Delaware First Health contract reaches the Ambetter network varies by state, so we ask
  • Why it’s here at all: Delaware’s exchange has three carriers after Aetna’s exit, which concentrates individual-market patients into Highmark, AmeriHealth Caritas Next and this one

What Delaware Law Does And Doesn’t Give You

It’s law now, but not until 2028. Read this before believing a headline
  • No credentialing clock until 2028. Delaware has no statute in force today putting a decision deadline on a carrier, no back pay for care delivered while credentialing runs, and no state-designated application form. The timelines above are each carrier’s own process
  • The law that isn’t in force yet. Senate Substitute 1 for Senate Bill 334, the Health Care Professional Access Act, passed both chambers on June 23, 2026 and was signed on September 8, 2026. It’s now Chapter 33B of Title 18 of the Delaware Code, and it takes effect January 1, 2028. Nobody should be planning a 2026 or 2027 application around it, and nobody should be telling you Delaware caps credentialing at 45 days
  • What changes in 2028. A carrier gets 15 days to call an application clean or incomplete, with a missed deadline deeming it complete, then 30 days to accept it, deny it or explain in writing why it needs longer, and 10 more to tell you the outcome. CAQH’s application becomes the uniform credentialing application. Provisional credentialing runs from the clean-application notice to the decision in set cases, including a carrier that misses its deadline and primary employment in a federally designated shortage area, and the bill’s synopsis notes that Delaware’s designated shortage areas currently include mental health professionals statewide, which would put a lot of behavioral health applicants inside that path. Claims for care delivered before credentialing are paid back to the complete-application date, provided credentials are ultimately granted
  • What we do in the meantime. Sequence carefully, file inside Highmark’s window, and keep the dated paperwork. Once the law takes effect, the date on your complete-application notice becomes worth money, and that’s a document a provider filing alone rarely thinks to demand

Medicare, DMAP and the Diamond State Health Plan plans are government enrollment, which is $450 per provider for each Medicare, Medicaid or Medicaid plan enrollment and can be bought on its own or with a package. Humana exited the employer group commercial medical business in a phase-out announced in 2023, so treat Humana in Delaware as a Medicare Advantage payer rather than a commercial group option.

Carry A Plan We Didn’t List? Add It.

The State of Delaware Group Health Insurance Program, DSAMH contracted services and PROMISE, Delaware Taft-Hartley union health and welfare trusts, Pennsylvania and New Jersey employer cards from Independence Blue Cross, Horizon and AmeriHealth New Jersey. You name the plan, we find the real route. Most of these aren’t contracts you apply for. Providers reach state employee members through their Highmark Delaware or Aetna contract rather than a separate agreement, union funds are usually reached by joining a rented network, and the Philadelphia-metro Blue plans reach you through BlueCard on the contract you already hold. DSAMH is the exception and runs the other way: certification first, then DMAP, then the plans, and only for the program-level services it governs. We confirm which network and application your practice needs.

Send These Once And We Can Start.

What We Need From You

You fill out the onboarding packet once. We prepare the applications and tell you plainly which ones only you can finish.

  • Your individual NPIPlus a Type 2 if you bill under a group or business. This matters more in Delaware than most places: DMAP issues a separate Medicaid ID for every combination of NPI, taxonomy and practice location, and a claim naming an unregistered one for a date of service after October 1, 2024 isn’t payable.
  • Active Delaware license and DEAFor your provider type. Both are verified as part of every commercial credentialing file.
  • Your intended start dateNot a detail we collect at the end. Highmark won’t accept an initial application filed more than six weeks ahead of it, so this date sets the whole filing calendar.
  • CAQH attested and authorizedYou attest it. We keep it current during your project and authorize each payer. Optum’s Delaware page requires CAQH participation, Highmark pairs it with its own Initial Credentialing Request Form, and Evernorth wants your CAQH ID with re-attestation every 120 days.
  • Delegated DMAP portal access, where Delaware allows itOnly fee-for-service and dually enrolled providers can register delegates. An MCO-only or ORP enrollment has no delegate route, and no delegate can complete a revalidation. Confirm the mail address on file too, because that’s where DMAP sends the 60-day revalidation notice and the welcome letter carrying your Medicaid ID and portal PIN.
  • Legal business name, EIN, and W-9One per tax ID you bill under. Ownership and managing-employee disclosures are part of the DMAP application, including the MCO-only version, and any change of ownership has to be disclosed to DMAP directly.
  • Malpractice certificateCurrent, naming you. AmeriHealth Caritas Delaware also asks behavioral health applicants for copies of diplomas, licenses and insurance riders.
  • Five years of work historyMonth and year, with any gap over six months explained. It lives in CAQH and it’s the most common reason a clean-looking file gets bounced back.

Delaware denies an enrollment application left unfinished for 60 days and makes you reset it, and a revalidation left unsubmitted for 60 days after the notice ends in termination plus a denied application, with every contract under that Medicaid ID dying on the revalidation date. That isn’t a Delaware quirk you can wait out, either. CMS wrote to every state on April 23, 2026 directing them to revalidate Medicaid providers, with a two-year revalidation strategy due within 30 days, so notices are landing across the country between now and 2028. Since a delegate can’t complete a Delaware revalidation, our job on that one is to watch the calendar and the address on file and hand you a finished file to submit yourself.

Delaware may also want the program itself licensed or certified, separate from your own professional license. The state licenses and certifies programs rather than clinicians, through the Division of Substance Abuse and Mental Health. DSAMH’s manual says every substance use disorder treatment program must hold both licensure and certification whether or not it bills DSAMH or Medicaid fee-for-service, and that a program not required to be licensed under state law still has to be certified by DSAMH in coordination with the Medicaid authority. The regime is aimed at programs: addiction treatment and co-occurring clinics, behavioral health rehabilitative services, PROMISE home and community-based services, and crisis programs. The same manual puts nurse practitioners and advanced practice nurses under the NP section of the State Plan, which is a good signal that a solo prescriber doing outpatient medication management usually sits outside it. In Delaware this step comes before your Medicaid enrollment rather than after it, which is why we ask early. We confirm whether it applies to you during onboarding and point you to DSAMH if it might. We don’t tell you whether you need a license or certification, we don’t publish the rules, and we don’t file it for you.

Physicians and outpatient medical groups, psychiatrists included, have their own physician credentialing page. For everyone else, our credentialing and payer enrollment page covers how we work in Delaware and the other 49.

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How It Works

Buy The Package

Published price and scope. No call needed.

One Onboarding Packet

Short and guided. It asks more only where your answers call for it.

We Fill It Out

Your DMAP enrollment, all three plan applications, and every commercial application, prepared from what you told us.

You Review And Sign

Read it, change anything, sign. Nothing goes out until you say so, and we name every step Delaware requires you to complete personally.

We Submit And Track

Every purchase includes Command Suite, so you can see where each payer application stands, what we’re working on, what’s waiting on a payer, and what we still need from you.

What We Commit To

Payer decisions, timing and rates aren’t ours to promise, and we don’t promise them. Our own work is a different matter. If something we delivered doesn’t work the way we said it would, tell us within 30 days of delivery and we fix it at no cost. If we can’t fix it, or can’t deliver what you bought, we refund the part it affected. Payments aren’t refundable unless the problem is our mistake. A new request, another payer or provider, a change of scope or a new build gets quoted separately.

When we’re done, the paperwork is yours. Your NPPES record, CAQH/DataSpring profile, DMAP portal account and payer contracts stay in your name, and you keep all of it if we stop working together.

Delaware Credentialing Questions

Questions We Get

Can You File My Delaware Medicaid Application For Me?
For fee-for-service and dually enrolled providers, yes. Delaware’s DMAP portal only lets you register a delegate for those two. An MCO-only enrollment or an ordering, referring and prescribing enrollment has no delegate route at all, so on those we work alongside you rather than instead of you. And no delegate can ever complete a revalidation. That one always comes back to the enrolled provider personally. So in Delaware we prepare everything, tell you exactly what only you can sign or attest, and tell you the date so the window doesn’t slip past you.
Delaware Passed A Credentialing Law With 45-Day Deadlines. Does It Apply To Me?
Not yet, and be careful with anyone who tells you it does. Senate Substitute 1 for Senate Bill 334, the Health Care Professional Access Act, passed both chambers on June 23, 2026 and was signed on September 8, 2026. It’s now Chapter 33B of Title 18 of the Delaware Code, but it takes effect January 1, 2028, and it isn’t a flat 45-day cap: a carrier gets 15 days to call an application clean or incomplete, then 30 days to accept it, deny it or explain why it needs longer. So there’s no Delaware credentialing cap today, and nothing about a 2026 or 2027 application should be planned around it. It’s worth planning for 2028, because it brings provisional credentialing in set cases, CAQH as the uniform application, and retroactive payment back to the complete-application date, and the bill’s own synopsis notes that Delaware’s designated shortage areas currently include mental health professionals statewide. Until then, each carrier runs its own clock.
Which Delaware Medicaid Plan Should I Join, And In What Order?
DMAP first, every time. Since March 1, 2022 a Delaware Medicaid plan is barred from entering an agreement with you until you’ve been screened and enrolled with DMAP, and the state says so in plain words. After that all three plans are statewide across all three counties, so this isn’t a question of matching plans to territories. Most practices take all three: Highmark Health Options, which has served Delaware Medicaid since 2015 and carries the largest membership, AmeriHealth Caritas Delaware, in since 2018, and Delaware First Health, the Centene plan serving members since January 1, 2023. AmeriHealth pays twice, because its sister company sells marketplace plans here and the Medicaid credentialing carries over.
Why Would Highmark Reject A Delaware Application That Looks Complete?
Usually because it arrived too early. Highmark won’t accept an initial credentialing application submitted more than six weeks before the practitioner’s start date, and that application is refused rather than held in a queue. So in Delaware the play isn’t to file as early as possible, it’s to file inside that six-week window with everything attached. Highmark’s stated goal is 45 days from a complete application, and it says openly that volume and missing information stretch it. Two more things that catch people: it’s a two-part submission, an attested CAQH profile plus Highmark’s own Initial Credentialing Request Form, and Highmark’s provider site also serves Pennsylvania, New York and West Virginia, so set the region to Delaware before you follow any instruction on it.
Do I Need Delaware Medicaid If I Only Write Prescriptions?
If you write for Delaware Medicaid members, yes, and this one is cheap insurance. Under the Cures Act rules Delaware applies, a claim carrying an unregistered NPI, taxonomy or service location for a date of service after October 1, 2024 isn’t payable. That reaches ordering, referring and prescribing providers who never intend to bill Delaware Medicaid at all, and the claim that dies is usually somebody else’s. There’s a specific application type for exactly this situation. DMAP also issues a separate nine-digit Medicaid ID for each combination of NPI, taxonomy and practice location, so three offices means three IDs, and each has to be registered before a claim naming it will pay.
Is Optum Accepting Behavioral Health Providers In Delaware?
For prescribers, yes, and Optum publishes it. Its Delaware page accepts MDs, DOs, PAs and RNs with prescriptive authority in all counties, and says it’s actively seeking telemental health providers, prescribers offering medication assisted treatment for addiction, Express Access providers who can see a member within five business days, and EAP-certified clinicians. The county detail cuts the other way for everyone else: PhDs and master’s-level clinicians are accepted in New Castle and Sussex counties only, not Kent. If you’re building a group with both prescribers and therapists, that’s a real planning constraint rather than a footnote, and it’s the kind of thing that only shows up after someone has already been hired.
Aetna Left The Delaware Marketplace. Should I Still Contract With Them?
Yes, for different reasons than a year ago. Aetna exited the individual and marketplace business in every state where it sold 2025 coverage, so it isn’t a 2026 Delaware exchange option and the exchange is down to three carriers: Highmark BCBSD, AmeriHealth Caritas Next and Ambetter from Celtic. What Aetna kept here is significant. It’s one of the two carriers administering medical plans for the State of Delaware Group Health Insurance Program, alongside Highmark, and in a state this small that’s a meaningful share of insured lives. So Aetna stays on the list for group and state-employee reach. Behavioral health professionals use the same request for participation as medical professionals.
What Happens If I Miss My Delaware Medicaid Revalidation?
Every contract under that Medicaid ID terminates on your assigned date if you haven’t revalidated by then, and that includes your plan network participation as well as your fee-for-service enrollment. A revalidation application left unsubmitted for 60 days after the notice ends in termination and a denied application. DMAP sends an automatic 60-day notice to the mail address on file, which makes that address critical. A portal delegate can’t complete a revalidation, so this is a date you keep personally. And if your Medicare PECOS enrollment is current, DMMA is authorized to use your PECOS revalidation date and information instead, which removes a lot of duplicate work.

Related

Keep Reading

Delaware PMHNP scope of practiceWhat Delaware allows you to do, separate from who pays you.
Pennsylvania credentialing and payer enrollmentHighmark again, plus an advanced practice track that pays less and hides you from the directory.
Maryland credentialing and payer enrollmentA Medicaid enrollment freeze and a portal replacement landing this year.
New Jersey credentialing and payer enrollmentBehavioral health moved into the MCOs in 2025, so the Medicaid door moved with it.
Opening your own practiceBusiness setup, identifiers, payers, EHR, and billing setup.
Adding a provider to your clinicFirst-time credentialing into contracts you already hold.
Changing your business or tax IDMoving panels without breaking the money.

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Official Pages For Delaware

Delaware Medical Assistance Program Provider EnrollmentEnroll or revalidate as a Medicaid provider.Delaware Health-Care Professional Access Act (18 Del. C. Chapter 33B)The state's credentialing rules for health insurers.Delaware Board of NursingNurse practitioner (APRN) licensing.Delaware Board of Mental Health and Chemical Dependency ProfessionalsLicensing for therapists and counselors.DataSpring Provider Data Portal (formerly CAQH)The credentialing application this state's rules name.

Where This Comes From

Links checked automatically on October 14, 2026. A source carries that stamp only when its page loaded and had not changed since the date we verified it.

We last reviewed this page on October 1, 2026. Each source listed shows the date we last verified it, and we will review the whole page again by January 18, 2027.

Payer programs, plans and timelines change. Everything here carries a verification date and gets re-checked on a review cycle. We will check these facts again by January 18, 2027. Approval and effective dates are controlled by each payer and by the state. This page covers payer operations. It isn’t legal, tax or scope of practice advice.

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