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97110 CPT Code - A Medical Biller’s Guide to Therapeutic Exercise

A professional person catch up the clipboard about tell us about the 97110 CPT Code for medical billing.

The 97110 CPT codes (therapeutic exercise) are a cornerstone of rehab billing, but misuse triggers 35% of denials in PT, OT, and chiropractic practices. As a billing specialist, understanding the nuances of time requirements and Medicare modifiers is key to clean claims. In this guide, I’ll decode the top 97110, share reimbursement strategies, and help you avoid costly audits.

What is the 97110 CPT Code?

97110 covers therapeutic exercises to improve strength, mobility, and function. Key details:

  • Time-Based Billing: Charge one unit per 15 minutes—services lasting 8 or more minutes qualify for one unit.
  • Examples: Stretching, resistance bands, and core stabilization.
  • Exclusions: General wellness activities (e.g., yoga classes).

Pro Tip: Documentation must specify how exercises address the patient’s diagnosis (e.g., “rotator cuff strengthening post-surgery”).

97110 Reimbursement Rates & Payer Rules

Medicare (Rates)

  • National Rate: $32.50 per 15-minute unit.
  • Modifier Requirement: Append -GP for PT services or -GO for OT.
  • Therapy Cap: KX modifier + medical necessity = exemption

Commercial Payers

  • Aetna: 28–28–45 per unit (varies by region).
  • UnitedHealthcare: Requires modifier -59 if billed with 97140 (manual therapy).

Denial Triggers

  • Missing functional progress notes (e.g., “improved shoulder ROM by 20%”).
  • Exceeding 8 units/day without prior authorization.

97110 Modifiers - Apply GP and KX correctly for accurate billing

Modifier

Use Case

-59

Distinct service (e.g., 97110 + 97140 on the same day).

-GP

Physical therapy under Medicare.

-KX

Exceeds therapy cap with medical necessity.

-96

Habilitative services (e.g., pediatric PT).

Example: Use 97110-GP-KX for Medicare patients who exceed the therapy cap.

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97110 in Chiropractic & Occupational Therapy

Chiropractic

  • Allowed: Only if exercises are adjunct to spinal manipulation (e.g., 98940 + 97110).
  • Red Flag: Medicare denies 97110 if billed without active treatment.

Occupational Therapy

  • Documentation Focus: Must tie exercises to ADLs (e.g., “grip strength drills to improve utensil use”).

5 Common 97110 Billing Mistakes (and Fixes)

  • Unbundling with 97530
    • Fix: Use 97530 (therapeutic activities) for dynamic tasks (e.g., balance drills), not repetitive exercises.
  • Incorrect Time Documentation
    • Fix: Note start/end times (e.g., “9:00–9:15 AM: 3×10 shoulder abduction sets”).
  • Overlooking Payer-Specific Rules
    • Fix: Aetna requires a 7-modifierfor habilitative care.
  • Missing Medical Necessity
  • Fix: ICD-10 Tip Use Z47.89 for joint aftercare, M25.511 for shoulder pain
  • Billing Home Exercise Programs
    • Fix: 97110 applies only to therapist-guided sessions. Use 97535 for HEP.

Final Thought

For billing teams, the 97110 CPT codes are both a revenue driver and an audit risk. A single error, like missing a GP modifier for Medicare, can cost clinics $15k+ annually in denials. By training providers on documentation (e.g., “3×12 reps of resistance band rows for rotator cuff weakness”) and staying updated CMS rules, you’ll:

  • Slash denials by 50 %+.
  • Justify medical necessity during audits.
  • Streamline reimbursements across PT, OT, and chiropractic.

Need Help? Our experts resolve 97110 denials in <48 hours. Schedule a Free Audit

Frequently Asked Questions (FAQs)

Yes! Append modifier -59 if services are separate (e.g., 97110 for strength + 97112 for balance).

Total timed units = (Total minutes / 15). Bill 1 unit for 8–22 minutes, 2 units for 23–37, etc.

How to appeal a 97110 denial for “lack of medical necessity”?

Submit progress notes showing functional gains (e.g., “patient climbed 5 stairs independently post-knee rehab”).

Yes, use Z47.89 for joint replacement aftercare or M25.511 for right

38–38–52 per unit (varies by payer).

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