Having your Physical Therapy (PT) denied by insurance is frustrating, but you have legal rights and a strong path to overturn the denial. Approximately 40-60% of insurance denials are overturned on appeal when patients submit comprehensive documentation and cite applicable laws. This guide walks you through exactly why physical therapy claims get denied, what medical necessity criteria major insurers apply, and how to build the strongest possible appeal.
Important Disclaimer
This guide is for informational purposes only and does not constitute legal or medical advice. Insurance coverage rules vary by plan type, state, and individual circumstances. Consult with a patient advocate, healthcare attorney, or your state Department of Insurance for advice specific to your situation. Information current as of 2026-03-28.
Why Physical Therapy Gets Denied by Insurance
Physical Therapy denials typically fall into specific, predictable patterns. Understanding the exact reason for your denial is the first step to building an effective appeal. The most common denial reasons for Physical Therapy (PT) include:
- Reason 1: Visit limit exhaustion — the plan's annual PT visit cap has been reached
- Reason 2: Insurer claims the patient has reached maximum therapeutic benefit and further PT will not improve function
- Reason 3: Lack of documented functional progress between sessions
- Reason 4: The diagnosis does not meet the insurer's criteria for continued physical therapy
- Reason 5: Services deemed maintenance therapy rather than rehabilitative therapy
Your Explanation of Benefits (EOB) or denial letter should include a specific reason code. Match that code to the reasons above to target your appeal effectively. If the denial letter is vague, you have the legal right to request the specific clinical criteria used to evaluate your claim.
Common Denial Codes for Physical Therapy
Insurance companies use standardized codes to explain denials. Here are the codes most frequently associated with physical therapy denials:
| Denial Code | What It Means |
|---|---|
| CO-119 | Benefit maximum for this time period has been reached |
| CO-50 | Not medically necessary |
| CO-96 | Non-covered charge — not meeting criteria for continued stay/service |
| CO-150 | Payer deems the information submitted does not support this level of service |
Understanding your specific denial code helps you tailor your appeal to address the exact basis for denial rather than making generic arguments. Request your complete claims file if the denial codes are not clear from your EOB. Use our EOB Decoder tool to understand your denial documentation.
Medical Necessity Criteria for Physical Therapy
Insurers distinguish between rehabilitative PT (covered — aims to restore function after injury or surgery) and maintenance PT (often not covered — aims to maintain current function). UnitedHealthcare typically approves PT when objective, measurable functional goals are documented and progress toward those goals is demonstrated at each re-evaluation. Aetna requires a treatment plan with specific, measurable, achievable goals and periodic re-certification. Blue Cross plans commonly cap PT visits at 20-60 per year depending on the state mandate. Under the ACA, rehabilitative and habilitative services are essential health benefits, and arbitrary visit limits may be challengeable.
Key Takeaway
Each insurer applies different medical necessity criteria for physical therapy. Request your specific insurer's medical policy for this procedure. The criteria they use must be disclosed to you upon request, and your appeal should address each criterion point by point.
Step-by-Step Appeal Process for Physical Therapy
Step 1: Request the Complete Written Denial
Contact your insurer and request the full written denial including the specific clinical criteria used, the reviewer's credentials, and your appeal rights and deadlines. Under ACA Section 2719, you are entitled to this information. Keep a log of every communication with your insurer — dates, names, reference numbers.
Step 2: Obtain Your Complete Medical Records
Request all records relevant to your physical therapy claim from every provider involved. Under HIPAA, you are entitled to your complete medical records. Focus on documentation that directly addresses the denial reason.
Step 3: Get a Letter of Medical Necessity from Your Provider
Ask your treating physician to write a detailed letter explaining exactly why Physical Therapy (PT) is medically necessary for your specific condition. The letter should reference the insurer's specific medical policy criteria and address each requirement. A generic letter is far less effective than one that directly responds to the denial reason.
Step 4: Gather Supporting Clinical Evidence
Collect clinical practice guidelines from relevant medical societies, peer-reviewed research supporting the procedure for your diagnosis, and any applicable insurer-specific policy bulletins. Evidence from the same clinical guidelines the insurer references is particularly powerful.
Step 5: Write and Submit Your Appeal
Your appeal should cite specific laws (ACA Section 2719, ERISA Section 503 if applicable, and relevant state laws), address the exact denial reason with point-by-point rebuttal, include all supporting documentation, and request a specific outcome (approval of the denied service). Submit by certified mail or through the insurer's online portal with delivery confirmation.
Step 6: If Denied, Escalate to External Review
If your internal appeal is denied, you have the right to an external review by an Independent Review Organization (IRO) under the ACA. The external reviewer is independent of the insurer and makes a binding determination. External review must be requested within 4 months of the internal appeal denial in most states. For urgent situations, expedited external review must be decided within 72 hours.
Sample Appeal Letter Language for Physical Therapy
Sample Appeal Excerpt
I appeal the denial of continued physical therapy for [condition], claim [X]. The denial states the patient has reached maximum therapeutic benefit. However, as documented in the attached functional progress reports, the patient has demonstrated measurable improvement: [specific metric, e.g., 'range of motion increased from 45 degrees to 90 degrees over the past 8 sessions']. The treating physical therapist's re-evaluation dated [date] establishes revised functional goals that are both specific and achievable within [X] additional sessions. Discontinuing PT at this stage may result in regression and potentially more costly interventions such as [surgery/injections].
Customize this language with your specific details — claim numbers, dates, provider names, and clinical findings. A personalized appeal that addresses the specific denial reason is significantly more effective than a generic template. Use our free appeal letter generator to build a complete letter.
Supporting Documentation to Strengthen Your Appeal
For physical therapy appeals, gather the following documentation before submitting:
- Initial PT evaluation with baseline functional measurements
- Progress notes showing measurable improvement over time
- Re-evaluation reports with updated goals and objective measurements
- Referring physician's statement supporting continued PT
- Functional outcome measures (DASH, LEFS, ODI scores at each interval)
- Documentation of what regression is expected if PT is discontinued
Organize your documentation clearly with a cover page listing all enclosed items. Number each exhibit and reference them specifically in your appeal letter. Incomplete or disorganized submissions are easier for insurers to deny.
Success Rate and Tips for Physical Therapy Appeals
While specific success rates vary by insurer and clinical scenario, data from state insurance regulators suggests that 40-60% of medical necessity denials are overturned when patients pursue a comprehensive appeal. For physical therapy specifically, the following strategies may improve your chances:
- Use standardized functional outcome measures (DASH, LEFS, Oswestry) to demonstrate measurable progress
- Document specific functional goals (not just pain reduction) — ability to return to work, climb stairs, lift objects
- If visit limits are the issue, cite the ACA essential health benefits provision and applicable state parity laws
- Request a peer-to-peer review between your PT and the insurer's reviewer
The single most important factor in appeal success is the quality and specificity of your documentation. Generic appeals fail. Appeals that address the exact denial reason with targeted clinical evidence succeed at much higher rates.
Check your appeal deadline to ensure you file within the required timeframe. Missing the deadline may forfeit your appeal rights entirely.
Frequently Asked Questions
How many physical therapy visits does insurance typically cover?
Coverage varies significantly by plan and state. Many commercial plans cover 20-60 visits per year, while some states mandate minimum PT visit coverage (e.g., Maryland mandates 60 visits). Medicare covers PT as long as it is medically necessary with no fixed visit limit, though there is a reporting threshold. The ACA classifies rehabilitative services as an essential health benefit, which means coverage cannot be eliminated entirely, though specific limits may apply.
What is the difference between rehabilitative and maintenance physical therapy?
Rehabilitative PT aims to restore function lost due to injury, illness, or surgery and is generally covered by insurance. Maintenance PT aims to preserve current function and prevent decline, and many insurers classify it as not medically necessary. The distinction matters enormously for appeals. Your therapist should document specific, measurable goals that demonstrate you are still making rehabilitative progress, not merely maintaining baseline function.
Can I appeal a physical therapy visit limit denial?
Yes. If your plan's visit limit has been reached but you still need PT, appeal by documenting continued medical necessity and functional progress. Under the ACA, rehabilitative services are essential health benefits, and some states have laws preventing insurers from imposing unreasonable limits on PT visits. The Mental Health Parity and Addiction Equity Act may also apply if the underlying condition has a behavioral health component.
What functional outcome measures should be in my PT appeal?
Include standardized tools such as the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire, the Lower Extremity Functional Scale (LEFS), the Oswestry Disability Index (ODI) for back conditions, or the Neck Disability Index (NDI). These validated instruments provide objective, numerical evidence of functional change that is harder for insurers to dismiss than subjective pain ratings.
What happens if I stop physical therapy too early?
Premature discontinuation of PT may result in incomplete functional recovery, increased risk of re-injury, progression to chronic pain, and eventual need for more costly interventions such as surgery or long-term medication use. Document these risks in your appeal. Your physician and physical therapist should both provide statements explaining the clinical consequences of stopping PT before reaching functional goals.
Sources: ACA Section 2719 · ERISA Section 503 · No Surprises Act · CMS regulations · State insurance codes · Clinical practice guidelines. Disclaimer: This article is for informational purposes only. Coverage rules vary by plan type and state. Consult a patient advocate or healthcare attorney for advice specific to your situation. Last updated: 2026-03-28.