CMS published the interim final rule (CMS-2454) defining "medically frail" today, June 1, 2026. This is the rule disability families have been waiting for since Congress mandated Medicaid work requirements in the 2025 budget reconciliation bill. The definition determines which enrollees are automatically exempt from work requirements rolling out in 2027.

If you're enrolled in Medicaid expansion coverage and have a disability, this rule directly affects whether you'll need to prove work hours, verify exemption status quarterly, or face disenrollment. Here's what the rule says, what conditions qualify, and what you need to do before your state's work requirements start.

What the Rule Defines as 'Medically Frail'

The CMS interim final rule establishes five categories for medically frail status:

1. Blind or disabled individuals: Anyone receiving SSI or SSDI automatically qualifies.
2. Disabling mental disorder: Serious mental illness that substantially impairs daily functioning, including major depressive disorder, bipolar disorder, schizophrenia, and PTSD when documented by a mental health provider.
3. Substance use disorder: Active diagnosis or participation in treatment within the past 12 months.
4. Intellectual, developmental, or physical disability: Includes cerebral palsy, spina bifida, muscular dystrophy, Down syndrome, autism spectrum disorder, and physical impairments requiring assistive devices or substantial accommodation.
5. Serious or complex medical condition: Chronic conditions requiring ongoing treatment and substantially limiting one or more major life activities, including but not limited to diabetes with complications, congestive heart failure, COPD, epilepsy, chronic kidney disease, and cancer.

The rule also includes a sixth open-ended category: "any other condition that CMS determines meets the statutory definition." CMS is currently evaluating whether specific high-acuity conditions like ventilator dependence, tracheostomy care, and dialysis confer permanent exemption without annual redetermination.

If you're enrolled in Medicaid expansion and don't receive SSI or SSDI, you may still qualify under categories 2 through 5, but you'll need to document it. The rule doesn't automatically exempt people based on disability status alone if they aren't enrolled in federal disability programs.

How States Are Implementing the Definition

As of KFF's January-March 2026 survey, 33 states had not finalized a medically frail definition. That changed today with the federal rule, but states still have discretion in how they apply it.

Nebraska, the first state to implement work requirements on May 1, 2026, uses a list of ICD-10 diagnosis codes and procedure codes to confer medically frail status. If your condition appears on Nebraska's code list, you're automatically flagged as exempt in the state's eligibility system. If your condition isn't on the list, you submit a provider attestation form and documentation.

Montana starts July 1. Arkansas soft-launches July 1 with no disenrollment penalties until January 2027. The national work requirement deadline is January 1, 2027.

Most states will conduct outreach to current Medicaid expansion enrollees between June 30 and August 31, 2026. That's your window to confirm exemption status before work requirements begin. If you don't respond to outreach or submit documentation, you're subject to the work requirement by default.

What to Do Right Now

If you receive SSI or SSDI: You're automatically exempt. You don't need to submit additional documentation. When your state sends an outreach notice, confirm your status through the provided channel, but you shouldn't need to provide medical records.

If you have a disability but don't receive SSI or SSDI: Gather documentation now. You'll need a current diagnosis from a licensed provider and a statement that your condition substantially limits daily functioning or requires ongoing treatment. For physical disabilities, include records of assistive device use or accommodation documentation from work or school.

If your condition is on the federal list but your state hasn't updated its system: Track when your state publishes its medically frail policy. Most states will adopt the federal definition verbatim, but some may add state-specific exclusions or procedural requirements. Check your state Medicaid website for updates starting mid-June.

If your condition isn't explicitly listed: The "serious or complex medical condition" category is intentionally broad. If your condition requires ongoing specialist care, limits major life activities, or requires substantial medication management, document it. Conditions like fibromyalgia, long COVID, uncontrolled asthma, and autoimmune disorders may qualify if a provider can attest to functional limitation.

The Documentation You'll Need

When your state's outreach window opens between June 30 and August 31, you'll submit:

• A letter from your treating provider on letterhead confirming your diagnosis
• A statement that your condition substantially limits one or more major life activities or requires ongoing treatment
• Recent medical records from the last 12 months showing treatment history
• For mental health conditions: documentation of diagnosis and treatment from a licensed mental health provider
• For substance use disorder: proof of active treatment or participation in a recovery program within the last 12 months
• For physical disabilities: prescription for assistive devices, accommodation letters, or specialist notes

If your provider doesn't regularly write these letters, ask them to reference the CMS interim final rule (CMS-2454) and the five medically frail categories. The letter doesn't need to be long: one page confirming diagnosis, functional limitation, and ongoing treatment is sufficient.

What Happens If You Don't Document in Time

If you don't respond to outreach or submit documentation by your state's deadline, you're subject to work requirements. That means 80 hours per month of work, job training, community service, or education. If you don't meet the requirement for three consecutive months, you lose Medicaid coverage.

Medicaid work requirements are rolling out in 41 states, and the law doesn't require states to track who loses coverage. If you're disenrolled, you'll need to reapply and prove exemption status retroactively. That process can take 60 to 90 days.

The safer path: document your exemption status during the outreach window. If your condition qualifies under any of the five categories, get it on file now.

If Your State Hasn't Finalized Its Medically Frail Policy

Half the states still haven't defined their medically frail process as of this writing. If you're in one of those states, monitor your state Medicaid agency's website and sign up for email alerts if available. The federal rule published today establishes the floor: states can't narrow the definition below these five categories, but they can add procedural steps.

Nebraska's ICD-code system is the template other states may adopt. If your state publishes a code list and your condition isn't on it, you'll need provider attestation. If your state adopts a fully attestation-based system, expect a slower review process.

Indiana just hired 400 workers to conduct quarterly Medicaid eligibility reviews. That's the scale states are building to implement these requirements. If your exemption isn't documented in the system before work requirements start, you'll be flagged for review on the first quarterly sweep.

What CMS Is Still Evaluating

CMS noted in the rule that it's evaluating whether certain high-acuity conditions should confer permanent medically frail status without annual redetermination. Conditions under consideration include:

• Ventilator dependence
• Tracheostomy requiring ongoing care
• Dialysis
• Organ transplant recipients on immunosuppression
• Severe intellectual disability with full-time care needs

If your condition falls into one of these categories, you'll still need to document it for the initial exemption. CMS will publish guidance on permanent exemptions later this year, but that won't happen before the June 30 outreach window opens. Document your status now; if CMS designates your condition as permanent later, you won't need to redetermine annually.

The Timeline

• June 1, 2026: CMS publishes interim final rule (today)
• June 30 to August 31, 2026: Most states conduct outreach to Medicaid expansion enrollees
• July 1, 2026: Montana work requirements begin; Arkansas soft-launch with no disenrollment
• January 1, 2027: National Medicaid work requirement deadline; Arkansas begins enforcing penalties
• Q3 2026: CMS expected to publish guidance on permanent medically frail designation for high-acuity conditions

If you're in Nebraska, your work requirements are already active. If you haven't documented medically frail status, do it this week.

If You're Already Subject to Work Requirements

Nebraska's work requirements started May 1. If you're a Nebraska enrollee and received a work requirement notice but didn't document a disability, you can still claim medically frail exemption retroactively. Submit the documentation to your state Medicaid agency with a cover letter referencing the CMS interim final rule published June 1, 2026. If you were incorrectly flagged for work requirements, your exemption should be processed and your status corrected.

If you've already been disenrolled for failure to meet work requirements, submit a new application with medically frail documentation. Most states allow a one-time reinstatement window if you can prove you were exempt all along.

What Families With Children Need to Know

Parents and caretakers of children under 6 are automatically exempt from Medicaid work requirements under a separate provision. You don't need to prove medically frail status unless you're claiming exemption based on your own disability.

However, if you're a parent of a disabled child and you're not receiving SSI or SSDI yourself, you're not automatically exempt as a caregiver. Some states have caregiver exemptions for parents of disabled children, but states are leaving out key exemptions in work requirement notices. If you're a parent or caregiver of a disabled child and your state's outreach notice doesn't mention a caregiver exemption, call your state Medicaid hotline and ask explicitly whether one exists. Don't assume silence means no exemption.

The Bottom Line

The medically frail definition is now federal policy. If your condition falls into any of the five categories (blind or disabled, disabling mental disorder, substance use disorder, intellectual/developmental/physical disability, or serious/complex medical condition), start gathering documentation now. The June 30 outreach window is three weeks away. When your state sends a notice, respond immediately with provider attestation and medical records.

If you're not sure whether your condition qualifies, err on the side of documenting it. A denied medically frail claim is easier to appeal than recovering Medicaid coverage after disenrollment.