Physical Therapy CPT Codes
Physical therapy billing runs on timed procedure codes from the Medicine section of CPT. Most are 15-minute codes governed by the CMS 8-minute rule, and knowing how treatment minutes convert to billable units is the difference between clean claims and constant corrections.
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Physical Therapy CPT codes
Therapeutic Exercise
Strength, endurance, range of motion, and flexibility. Requires direct one-on-one therapist contact. Most commonly billed PT code.
Therapeutic Activities
Dynamic, functional tasks targeting real-world performance (transfers, reaching, carrying). Distinct from 97110 which targets isolated physical attributes.
Manual Therapy Techniques
Hands-on joint mobilization, soft tissue mobilization, manual lymphatic drainage, and traction. Therapist must be in direct contact.
Neuromuscular Reeducation
Targets motor control, proprioception, and coordination. Used for neurological conditions and post-surgical motor retraining.
Gait Training
Improving walking mechanics, safety, and endurance. Often combined with other PT codes for comprehensive mobility rehabilitation.
Therapeutic Procedure, Group
Group-based therapeutic services with 2 or more patients simultaneously. Lower per-patient reimbursement than individual codes.
Self-Care / Home Management Training
Training in ADLs, home safety, and functional independence skills. Often used in occupational therapy as well.
Hot or Cold Packs
Passive thermal modality. Low reimbursement, typically bundled by many payers or not separately reimbursable.
Ultrasound Therapy
Therapeutic ultrasound for tissue healing, pain, and scar management. 15-minute timed code.
Orthotic Management and Training
Assessment, fitting, and training in use of orthotic devices. One-on-one required.
Codes in blue have full detail pages with documentation requirements, billing mistakes, and FAQ.
Physical Therapy billing notes
The 8-minute rule decides your units. Eight minutes of a timed service earns one unit, minutes accumulate across every timed code in the session, and anything under eight minutes doesn't bill at all.
97110, 97530, and 97140 carry most PT claims. Each covers a distinct service, and the same treatment minutes can never count toward two codes.
When a PTA delivers the service for a Medicare patient, append modifier CQ. Payment drops 15%, a rule in effect since January 2022.
Medicare's combined PT/SLP therapy threshold sits around $2,300 and updates each January. Claims above it need the KX modifier and documentation that keeps proving medical necessity.
Commercial payers split on prior authorization. Check before the plan of care starts, not after the third visit gets denied.
Frequently asked questions about physical therapy billing
How does the 8-minute rule work for PT billing?▼
You need at least 8 minutes of a timed service to bill one unit of it. Units stack in 15-minute blocks: 8 to 22 minutes is one unit, 23 to 37 is two, 38 to 52 is three. Total timed minutes across the whole session determine the total units, so keep per-code minutes in the note.
Can 97110 and 97140 be billed in the same visit?▼
Yes, when they cover separate time and distinct services. Fifteen minutes of therapeutic exercise plus fifteen of manual therapy is two clean units. The denial trap is overlapping time: the same minutes can never count toward two codes, and some payers want modifier 59 on the pair.
What's the difference between 97110 and 97530?▼
97110 targets isolated deficits: strength, range of motion, flexibility. 97530 uses functional, real-world activities like lifting, reaching, or transfers. If the note describes a task a patient does in daily life, 97530 fits; if it describes sets and reps for a body part, that's 97110.
Sources
- Code set structure and updates: American Medical Association — CPT
- Fee schedule and component billing rules: CMS Medicare Physician Fee Schedule
- How we research and verify: our editorial policy
CPT® is a registered trademark of the American Medical Association. Content on this page is original educational writing, not a reproduction of AMA-copyrighted descriptions. Verify codes and payer rules before billing.