Medical Source Statement HA-1151 and HA-1152 in 2026: How to Get Your Doctor to Support Your SSDI Claim

By Anthony Albert, Benefits Research Director - Updated May 4, 2026

The single most powerful piece of evidence you can put in your SSDI file is a Medical Source Statement from your treating doctor. Not a letter. Not a clinic note. A formal MSS form filled out by the doctor who knows your case best, describing in concrete terms what you can and can't do at work.

SSA uses two MSS forms: HA-1151 for physical limitations and HA-1152 for mental limitations. They're the same forms that DDS examiners and ALJs use to anchor the Residual Functional Capacity finding. When your doctor fills one out and the limitations are severe enough, the case becomes very hard to deny.

The catch: most doctors won't fill these out unless you ask the right way, give them the form, and explain what's at stake. And a poorly-filled-out MSS can hurt your case more than no MSS at all. Here's how to get a useful one in 2026.

What the MSS Forms Actually Are

The Medical Source Statement is a structured form SSA gives doctors to describe a patient's work-related functional limitations. SSA has two main versions:

• HA-1151 (Physical). "Medical Source Statement of Ability to Do Work-Related Activities (Physical)." Used for back pain, joint problems, heart conditions, lung conditions, neurological problems affecting movement, and any condition with physical impact on work.
• HA-1152 (Mental). "Medical Source Statement of Ability to Do Work-Related Activities (Mental)." Used for depression, anxiety, PTSD, bipolar disorder, schizophrenia, autism, ADHD, intellectual disabilities, and any condition with mental or cognitive impact.

Both forms are used by ALJs at hearings and by DDS examiners during initial review. The form numbers (HA-1151, HA-1152) come from the Office of Hearings Operations. SSA also has older versions (SSA-3373, SSA-545, SSA-2506) that are used at the DDS level. The content is similar, but the HA-prefixed forms are what attorneys typically use.

The forms are public. You can download them from ssa.gov/forms or from your attorney. Some doctors are familiar with them. Many are not. Either way, you'll usually have to bring them to the appointment yourself.

Why MSS Matters So Much

SSA's regulations require examiners and ALJs to consider opinions from your treating sources. The 2017 rule change ended the old "treating physician rule" that gave automatic deference to a treating doctor, but the regulations still tell adjudicators to consider supportability, consistency, relationship, and specialization. A well-supported MSS from a doctor who's seen you regularly is high-value evidence.

Real-world impact: ALJs at hearings rely heavily on RFC opinions when crafting their decisions. A vocational expert at the hearing testifies based on the RFC the ALJ adopts. If the ALJ adopts the limitations in your treating doctor's MSS, and those limitations rule out all jobs the VE identifies, the case gets approved. If the ALJ instead adopts a less restrictive RFC (often based on a state agency consultant who never examined you), the case can go either way.

This is where the MSS becomes the most valuable piece of evidence. A well-supported, consistent, specific MSS from your treating specialist is one of the strongest pieces of evidence in the entire file.

HA-1151 (Physical): What's On the Form

The HA-1151 covers physical work-related abilities across these categories:

Lifting and carrying. The doctor checks how much you can lift occasionally (up to 1/3 of an 8-hour workday) and frequently (up to 2/3 of an 8-hour workday). Categories: less than 10 pounds, 10 pounds, 20 pounds, 25 pounds, 50 pounds, 100 pounds. The lifting limit translates directly into RFC categories: sedentary (10 lbs), light (20 lbs), medium (50 lbs), heavy (100 lbs).

Standing and walking. Total during an 8-hour workday. Categories: less than 2 hours, at least 2 hours, about 6 hours.

Sitting. Total during an 8-hour workday. Same categories.

Sit/stand option. Whether you need to alternate sitting and standing, and at what frequency.

Pushing and pulling. Limitations on push/pull with arms or legs.

Postural activities. Climbing ramps/stairs, climbing ladders/ropes/scaffolds, balancing, stooping, kneeling, crouching, crawling. Frequency categories: never, occasionally, frequently, constantly.

Manipulative activities. Reaching (overhead and other), handling (gross manipulation), fingering (fine manipulation), feeling. Frequency categories same as postural.

Visual, communicative, and environmental limitations. Vision, hearing, exposure to extreme cold/heat, wetness/humidity, noise, vibration, fumes/odors/dust/gases, hazards (machinery, heights). Limitations have to be tied to a medically-determinable impairment.

Number of unscheduled breaks per workday. How many extra breaks beyond normal (15-minute morning break, 30-minute lunch, 15-minute afternoon break) you'd need due to your conditions. Each unscheduled break of 15+ minutes is a problem at most jobs.

Days absent per month. How many days per month you'd be absent due to symptoms or treatment. Missing 2+ days a month rules out most jobs. Missing 3+ days rules out essentially all unskilled work.

Off-task time. Percentage of an 8-hour workday you'd be off-task due to symptoms. Off-task more than 15 percent rules out most jobs. Off-task more than 20 percent rules out all jobs at the unskilled level.

Supportive findings. The form has space for the doctor to identify the specific medical signs, lab findings, or clinical observations that support the limitations. This is the most important section. An MSS without supporting findings is weak. An MSS with detailed supporting findings is strong.

HA-1152 (Mental): What's On the Form

The HA-1152 covers mental work-related abilities across four major categories that map directly to the SSA's "B criteria" for mental listings:

Understanding, remembering, and applying information. Ability to understand and remember instructions (simple, detailed, complex), apply information to perform job tasks. Rated none, mild, moderate, marked, extreme.

Interacting with others. Ability to relate to coworkers, supervisors, and the public. Includes accepting instructions, responding appropriately to criticism, getting along without distracting others. Rated none, mild, moderate, marked, extreme.

Concentrating, persisting, and maintaining pace. Ability to maintain attention for extended periods, work without excessive breaks, complete tasks at a sustained pace. Rated none, mild, moderate, marked, extreme.

Adapting and managing oneself. Ability to respond to changes in routine, manage symptoms, handle stress, set realistic goals, maintain hygiene and grooming. Rated none, mild, moderate, marked, extreme.

The rating definitions on the form:

• None: Functions independently, appropriately, effectively, on a sustained basis.
• Mild: Slightly limited.
• Moderate: Fair functioning.
• Marked: Seriously limited.
• Extreme: Unable to function in this area.

"Marked" or "extreme" in two of the four B criteria areas, or "extreme" in one area, can satisfy paragraph B of any mental disorder listing. See our Adult Mental Disorder Listings 2026 article for the full B-criteria framework.

The form also asks the doctor to identify supporting clinical findings: mental status exam observations, neuropsych testing, treatment notes, behavioral observations. Just like the physical form, an MSS without supporting findings carries little weight.

How to Ask Your Doctor

Most doctors will fill out an MSS when asked correctly. Some won't. Here's how to make it more likely:

1. Pick the right doctor. The doctor who knows your case best. For physical conditions, that's usually your treating specialist (orthopedist, rheumatologist, cardiologist, neurologist, pulmonologist) or your primary care doctor if they've been managing you for years. For mental conditions, it's your psychiatrist, psychologist, or therapist. The doctor who sees you most often and has the longest history with your case writes the strongest MSS.

2. Print the right form and bring it to the appointment. Don't email it or fax it cold. Bring it to a regular appointment so the doctor sees you in person. Have a clean blank copy plus a list of your specific limitations to discuss.

3. Set up the conversation. Don't ambush the doctor at the end of a 15-minute appointment. Schedule a longer visit specifically to discuss your disability application, or call ahead to the office and ask if you can drop the form off and pick it up filled out. Some doctors charge a fee for completing forms (often $50 to $250). Ask in advance.

4. Bring your symptom log. A two-week log showing your daily pain levels, energy, mood, sleep, and any flare-ups gives the doctor concrete data to use when filling out the form. It also signals you're serious about the case.

5. Be specific about limitations. Tell the doctor: "I can stand 10 minutes before my back makes me sit down. I can walk one city block before I have to rest. I lift a gallon of milk but not 20 pounds. I miss work 3 to 4 days a month due to migraines." The doctor matches your specifics to the form's checkboxes.

6. Ask for supportive findings to be filled in. The most important box on the form is the "supporting clinical findings" section. Ask the doctor to write down the specific signs and findings that support each limitation. "Decreased grip strength on right per dynamometer testing 4/2025" is much stronger than just checking a box for limited handling.

7. Don't pressure the doctor to overstate. A doctor who refuses to overstate limitations is doing you a favor. SSA's adjudicators detect inconsistency between the medical record and an MSS quickly. A doctor who fills out an extreme MSS with no supporting clinical findings actually hurts your case. You want an honest MSS, not an exaggerated one. The honest version, when supported, wins cases.

What Doctors Often Get Wrong

The MSS forms are technical. Doctors who haven't filled one out before tend to make these mistakes:

Skipping the supportive findings boxes. The most common error. The doctor checks the limitation boxes but doesn't fill in the supporting clinical findings. When SSA reviews the form without findings, they discount it for lack of supportability.

Vague timing language. "Patient has chronic pain" without specifying when symptoms started, frequency, severity, response to treatment. Adjudicators want dates, frequencies, and specifics.

Mixing limitations from different conditions without clarifying. If a patient has both back pain and depression, the doctor should attribute each limitation to its medically-determinable impairment. Lumping everything as "patient unable to work" doesn't help.

Using "permanent" or "lifelong" without specifying functional details. Adjudicators don't decide on the doctor's conclusion that someone is "permanently disabled." They decide based on functional findings. A doctor who writes "patient is permanently disabled and unable to work" without functional details produces a weak form. The same doctor writing "patient can sit 30 minutes, stand 15 minutes, lift 5 pounds, has marked limitation in concentration" produces a strong one.

Not signing or not dating. Sounds basic. It happens. SSA can ignore unsigned or undated MSS forms.

Coordinating with the SSA-3373 Function Report

Your own answers on the SSA-3373 Function Report should be consistent with your doctor's MSS. If your Function Report says you cook three meals a day standing at the stove and walk two miles every morning, but your doctor's MSS says you can stand 10 minutes and walk one block, the file has an internal contradiction. ALJs and adjudicators catch these.

The fix: think about both forms together. Your Function Report should describe your worst or average days, not your best days. Your doctor's MSS should reflect what they actually observe and what your records show. The two forms should tell the same story without rehearsing the same script. See our SSA-3373 Function Report 2026 article for the section-by-section walkthrough.

Same goes for the third-party SSA-3380, which is filled out by a family member or close friend. All three forms (your function report, the third-party version, your doctor's MSS) should describe the same person.

Multiple MSS Forms from Multiple Doctors

If you have multiple treating sources, each can submit an MSS. Two consistent MSS forms from different specialists is stronger than one. Three from different specialists, all consistent, is very strong.

Common multi-MSS scenarios:

• Back pain claim: orthopedist (HA-1151) + pain management physician (HA-1151)
• Mental health claim: psychiatrist (HA-1152) + therapist (HA-1152) + primary care (HA-1151 if physical comorbidities)
• Multi-system claim: rheumatologist + pulmonologist + cardiologist (each for their domain)
• Combined physical + mental: pain specialist (HA-1151) + psychologist (HA-1152)

If two doctors give significantly different limitations, the ALJ has to choose. They usually go with the doctor who has the longest treatment history, the most direct knowledge of the case, and the most supporting findings.

What If My Doctor Won't Fill Out an MSS?

Some doctors flat-out refuse. Common reasons:

• "It's against clinic policy." Many large hospital systems prohibit physicians from filling out disability paperwork. This is real but workable. Switch to a doctor who can.
• "I don't fill out forms for legal cases." Some doctors avoid anything they perceive as litigation-related. Explain that this isn't litigation, it's a federal benefits application.
• "You'd be better off getting an independent medical exam." Translation: I'm not comfortable doing this. Find another provider.
• "I'll write a letter instead." A letter can work but is much weaker than the structured form. Push for the form. If the doctor only writes a letter, ask them to address the same categories the form covers (lifting, standing, walking, sitting, postural, manipulative, off-task percentage, days absent).

If your doctor still refuses, you have options. Some attorneys have working relationships with independent medical examiners who fill out MSS forms based on a single in-person evaluation. The cost is $300 to $1,500 for the exam plus form. Some long-treating specialists, even outside your usual care, will do this. ALJs give independent examiner forms less weight than treating physician forms, but they still help.

State-Specific Notes

Some states have local resources that help with MSS forms:

• California: Disability Rights California (DRC) operates a Protection and Advocacy program (PABSS) that includes some help with disability paperwork.
• Texas: Disability Rights Texas (DRTx) provides similar PABSS services. Texas Medical Association maintains a list of doctors familiar with disability paperwork.
• New York: New York Lawyers for the Public Interest and Disability Rights New York both provide PABSS help.
• Florida: Disability Rights Florida operates PABSS and may help with finding cooperative providers.
• Pennsylvania: Disability Rights Pennsylvania, plus several FQHCs (federally qualified health centers) where staff are familiar with disability documentation.

WIPA programs in every state also offer free help with the application process. Call 1-866-968-7842 to find your local WIPA. They can connect you with cooperative providers and help format the supporting findings.

Bottom Line

The Medical Source Statement is the most important piece of evidence you can put in your SSDI file. Get the right doctor, bring the right form, ask the right way, and make sure the supporting findings are filled in. Coordinate the MSS with your Function Report so they tell the same story.

An honest, well-supported MSS from a long-treating specialist often turns a marginal case into a winning one. A vague or unsupported MSS, no matter how restrictive, can be discounted by adjudicators and waste an opportunity. Get this part right and the rest of the case gets easier.