Modifier 97
Rehabilitation Service
Rehabilitation service
Important: Modifier usage depends on documentation and payer policy. Never add a modifier without supporting documentation. Always verify payer-specific rules, as modifier policies vary. The information on this page is for educational purposes only and does not guarantee payment. When in doubt, consult the official CPT guidelines, NCCI Policy Manual, and payer-specific policies.
Modifier Description
Modifier 97 indicates a rehabilitation service — services that help a person restore functions lost due to illness or injury.
Why This Modifier Exists
Modifier 97 was created to identify rehabilitation services — those that restore skills or functions lost due to illness or injury. Without it, payers would not know whether to apply rehabilitation or habilitation benefit limits.
Plain English Explanation
Rehabilitation is for restoring skills you lost (like re-learning to walk after a stroke). If the service is rehabilitative rather than habilitative, you add modifier 97.
When to Use
Use for rehabilitative services that help patients restore lost skills or functions, as opposed to habilitative services which help learn new skills.
When NOT to Use
Do NOT use for habilitative services — use modifier 96.
Documentation Requirements
The medical record must document that the service is rehabilitative (restoring lost skills) vs habilitative (learning new skills).
Common Denial Reasons
- CO-24 (not covered under benefit plan), CO-16 (missing documentation), CO-50 (not medically necessary), CO-96 (non-covered service).
Common Rejection Reasons
- Rejected for not documenting the rehabilitative goal.
- Rejected if the plan doesn't cover rehabilitation.
- Rejected for confusing rehabilitation with habilitation.
Common Mistakes
- Confusing rehabilitation with habilitation.
- Not documenting the rehabilitative nature.
Example Scenarios
Physical therapy after a knee replacement to restore walking — modifier 97.
Speech therapy after a stroke to restore speech — modifier 97.
Payer Considerations
Most plans cover rehabilitation. Check each payer's rehabilitation benefit. Some plans have visit limits. Medicare covers rehabilitation under Part B therapy caps.
Telehealth Considerations
Rehabilitation services can be delivered via telehealth. Combine with modifier 95 as appropriate.
Hospital Considerations
Hospital outpatient therapy can use modifier 97 for rehabilitative services.
Professional Billing Considerations
For professional billing, use modifier 97 for rehabilitative therapy. Document the rehabilitative goal. Check plan benefits and therapy limits.
Never Add Without Documentation
Never add modifier 97 to a claim without supporting documentation. Always verify payer-specific rules and consult the official CPT guidelines, NCCI Policy Manual, and payer policies. When in doubt, consult a certified coder or billing specialist.
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