To treat MO HealthNet members, whether through fee-for-service Medicaid or one of Missouri’s managed care plans, a clinician must first be enrolled with MO HealthNet. In Missouri, enrollment is handled by a state unit focused on audit and compliance, and it has some requirements that catch providers off guard, including not accepting a W-9 as proof of tax ID. Here is how Missouri Medicaid provider enrollment works, step by step, as of 2026.
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Who Runs Medicaid Enrollment in Missouri
MO HealthNet, Missouri’s Medicaid program, is administered by the Department of Social Services, MO HealthNet Division. Provider enrollment is handled by the department’s Missouri Medicaid Audit & Compliance (MMAC) Provider Enrollment Unit, not by the claims fiscal agent. Many provider types apply online through eMOMED, while others request a paper enrollment packet from MMAC.
How to Enroll, Step by Step
MMAC’s individual enrollment flow chart (April 2025) describes these steps:
- Decide how you will bill: under your own name, through an enrolled organization, or both.
- Complete the MMAC application using your Social Security number, your LLC’s EIN, or the organization’s pay-to information.
- Complete the Business Organizational Structure (BOS) form.
- Fax your documents to MMAC.
- Respond to any requests for more information, or receive your approval letter.
- Add any organization locations in eMOMED.
MMAC processes applications in the order received, and an application that is returned loses its place in line, so submit a complete package.
Documents Required
MMAC’s requirements include:
- An IRS document with your name and tax ID pre-printed, such as a CP-575 or 147C letter, or a Social Security card. MMAC does not accept W-9s or 1099s as proof.
- The BOS form listing all owners and managing employees, with Social Security numbers and dates of birth, signed by hand.
- Registration with the Missouri Secretary of State, for business entities.
- A signed Title XIX Participation Agreement.
Screening by Risk Level
- Limited risk: database checks, including NPPES and sex offender registries.
- Moderate risk: adds pre-enrollment and unannounced site visits, waived if Medicare or another state completed one in the past two years.
- High risk: adds fingerprinting for owners with 5% or more interest, waived if submitted elsewhere in the past two years.
Provider types that are not listed are screened as moderate risk.
Is There an Application Fee?
MMAC currently sets the application fee at $750 for new and revalidating institutional providers. Physicians, dentists, and other individual practitioners are exempt. The fee is waived if it was paid to Medicare or another state within the past two years, and proof of payment is required before MMAC processes the application. The fee is charged once per EIN.
Managed Care: Enrollment Is Required
Since January 1, 2018, every provider in a MO HealthNet managed care network, including ordering and referring providers, must be enrolled with MO HealthNet. Providers already enrolled for fee-for-service or ordering and referring do not need to apply again. Clinicians who only participate in managed care can use MMAC’s separate MCO Network Provider applications, which do not require seeing fee-for-service patients. Missouri’s managed care plans are Healthy Blue, Home State Health, and UnitedHealthcare, plus Show-Me Healthy Kids, operated by Home State Health for children in foster care and related groups.
Ordering, Prescribing, and Referring Providers
Missouri offers ordering, prescribing, and referring-only enrollment, which requires a questionnaire, an application, and the Title XIX agreement. OPR-only providers cannot bill MO HealthNet.
Behavioral Health Clinicians and Dentists
Missouri enrolls behavioral health clinicians, including LPCs and provisional LPCs, psychologists and provisional psychologists, and LCSWs and LMSWs, under provider type 49. Dentists enroll as provider type 40. Our Missouri behavioral health billing page covers the billing side.
Revalidation
MO HealthNet requires revalidation at least every five years, and due dates appear in eMOMED. In May 2026, MMAC also announced an off-cycle revalidation for certain high-risk provider types, with deadlines in October 2026 and March 2027, so watch eMOMED for notices even if your five-year date is far off.
How Long It Takes
MMAC’s flow chart states that enrollment takes 30 or more days. Plan credentialing follows enrollment, so allow a few months before you see managed care members.
Common Reasons Applications Stall
- Sending a W-9 instead of an IRS-issued tax ID document.
- A BOS form that is incomplete or not signed by hand.
- An application returned for corrections, which loses its place in line.
- Missing proof that an institutional application fee was paid.
Let Us Handle Missouri Medicaid Enrollment
Maximum Billing handles MO HealthNet enrollment, managed care credentialing, CAQH, and revalidation tracking for Missouri practices. See our behavioral health credentialing services, medical credentialing services, and dental credentialing services, or contact us to get started.
This guide reflects official MO HealthNet and MMAC information as of October 2026. Requirements change, so confirm current rules with MMAC before you apply.