How to Fill Out and Submit the Missouri Medicaid Prior Authorization Form

To request coverage approval before delivering a service, MO HealthNet providers complete the Missouri Medicaid prior authorization form that matches the service type — most often the Drug Prior Authorization form (886-3003) — and submit it by fax, phone, mail, or the CyberAccess portal. Every field on the form must be filled in or the request will not be processed.¹ Do not deliver the service until you have a confirmed approval; without one, MO HealthNet can refuse payment and the cost falls to the provider or the patient.²

Pick the Right Form for the Service

MO HealthNet uses different forms and different intake channels depending on what’s being authorized.

Prescription drugs. Use the Drug Prior Authorization form (886-3003), available as a fillable PDF from the MO HealthNet Division. This is required for non-preferred formulary drugs, brand-name drugs when a generic equivalent exists, and specialty medications such as growth hormones and hepatitis C treatments.³
Durable medical equipment. DME items that require authorization are listed in Section 19 of the DME provider manual. Requests that fall outside standard coverage for participants over 21 go to the MO HealthNet Exceptions Unit on a separate exception request form.²
Behavioral health. Clinical exceptions and psychology or counseling authorizations run through a dedicated help desk at (866) 771-3350.⁴

Always download the latest version of whichever form you need. Older forms circulating in office files may be missing fields the reviewer now expects.

How to Complete the Drug Prior Authorization Form

The Drug Prior Authorization form has three working sections. The clinical middle section is where most denials originate, so it deserves the most care.

Patient Information

Enter the participant’s MO HealthNet number, full name, and date of birth. The MO HealthNet number is the identifier that links your request to the participant’s active coverage file. Mark whether this is an initial request or a renewal; renewals use the same form, but the reviewer will look for evidence that the medication continues to be necessary.¹

Clinical and Medication Details

Provide:

The diagnosis and its ICD-10 code. The diagnosis must be consistent with a medically accepted use of the requested drug. A mismatch triggers a denial.
The date the diagnosis was established.
The requested drug name, dosage form, strength, and dosing schedule.
Whether the patient is currently taking the drug and, if so, the date it was first used.
The duration of need.
The patient’s full current drug regimen, with dosing schedules for every medication.
Every previously tried alternative, including dose, schedule, and how long the patient used it, plus a specific clinical explanation of why each was discontinued or not used.
If you are requesting a brand-name drug, when the generic was tried, for how long, and the results. If the generic was never tried, explain why.

The alternative-medication section is where the reviewer spends the most time. A vague explanation such as “patient preferred brand” almost always gets denied. Give specific clinical reasons: adverse reactions, documented treatment failure, contraindications with other medications in the regimen.¹

Prescriber Information and Signature

The requesting physician or advanced practice nurse must fill in name, title, telephone, fax, address, specialty, and National Provider Identifier (NPI). The form requires an original signature; a stamp will not do. Attach any supporting clinical documentation on a separate sheet.¹

Where to Send the Completed Form

Drug prior authorization requests go to the MO HealthNet Division through any of these channels:

Fax: (573) 636-6470
Phone: (800) 392-8030, option 3 for drug PAs
Mail: ATTN: Drug Prior Authorization, MO HealthNet Division, PO Box 4900, Jefferson City, MO 65102-4900
CyberAccess portal: cyberaccessonline.net

If you’re not sure what documentation a specific medication requires, call (800) 392-8030 before you submit.¹

DME exception requests and physical therapy exceptions go to the Exceptions Unit by fax at (573) 522-3061. Behavioral health clinical exceptions go through (866) 771-3350.⁴

Confirmation and Decision Timelines

Missouri law requires the reviewer to send back a unique confirmation number when it receives your request, using the same method you used to submit unless you asked in writing for something different.⁵ Save that number. It’s proof the review clock has started and your reference for any follow-up.

For managed care plans, federal regulations set the outer limits on how long a decision can take. Starting with rating periods on or after January 1, 2026:

Standard requests: a decision within 7 calendar days of receipt.⁶
Expedited requests, when waiting the standard period could seriously jeopardize the patient’s life, health, or ability to function: a decision within 72 hours.⁶

Either timeline can be extended by up to 14 additional calendar days if the patient or provider asks for the extension, or if the plan needs more information and can show the extension serves the patient’s interest.⁶ In practice the extension usually means the reviewer needs more clinical records, and the clock pauses until you send them.

The decision notice goes to both the provider and the participant. An approval will state when or under what circumstances the authorization expires.⁷

If the Request Is Denied

A denial notice must state the specific reason. The usual reasons are insufficient documentation of medical necessity, a lower-cost alternative the patient hasn’t tried, or a diagnosis that doesn’t match a medically accepted use of the requested drug or service. Fixing the underlying gap and resubmitting is often faster than appealing, but the participant also has a formal appeal right.

Requesting a State Hearing

Participants can request a state administrative hearing through the Missouri Department of Social Services.⁸ Federal law gives up to 90 days from the date the denial notice was mailed to file.⁹ Submit Form IM-87 by:

Email to IMHearing.FSD@dss.mo.gov, with the form and any supporting documents attached
Fax to (573) 526-4554
Mail to PO Box 2700, Jefferson City, MO 65102
In person at any local DSS office¹⁰

Keeping Benefits During the Appeal

A participant already receiving the service or medication can keep it going during the appeal, but only by filing the hearing request within 10 calendar days of the adverse action notice.¹⁰ Miss that window and the service stops until the hearing is resolved. At the hearing, the participant can represent themselves or bring a lawyer, family member, or friend to speak for them. Interpretation, translation, and accessibility aids such as Braille materials are provided at no cost for participants with limited English proficiency or a disability.¹¹

Broader Coverage for Children Under 21

Children on MO HealthNet have a wider coverage guarantee than adults through the federal Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit. Under EPSDT, states must cover any Medicaid-coverable service, in any amount, that is medically necessary for a child, even if the service is not part of the state’s standard benefit plan.¹²

The practical effect: a denial based on “service not covered” has a much higher bar for a child. If a screening identifies a medical need, treatment must follow, and screenings can happen outside the routine schedule whenever a need is identified. One limit worth knowing: a family that goes to a non-network provider or a provider who doesn’t participate in MO HealthNet, without prior approval, will generally be responsible for the bill except in emergencies. EPSDT governs what the state must pay for, not the provider’s network status.¹²

1
Missouri Hospital Association. Missouri Department of Social Services MO HealthNet Division Drug Prior Authorization
2
myDSS. Durable Medical Equipment Prior Authorization
3
Missouri Department of Social Services. Drug Prior Authorization 2575-017
4
eMOMED. MO HealthNet Division Contact Information
5
Missouri Revisor of Statutes. Missouri Revised Statutes RSMo 376.1364
6
eCFR. 42 CFR 438.210 – Coverage and Authorization of Services
7
CMS.gov. CMS Interoperability and Prior Authorization Final Rule
8
Missouri Department of Social Services. Benefit Hearings
9
eCFR. 42 CFR Part 431 Subpart E – Fair Hearings for Applicants and Beneficiaries
10
DSS Manuals. IM-87 Instructions
11
Medicaid.gov. Understanding Medicaid Fair Hearings
12
MACPAC. EPSDT in Medicaid