The most commonly used ICD-10 codes in PT by body system — with documentation tips and billing notes to reduce claim denials.
Search by condition, body region, or symptom. Click any code to copy it instantly. Expand for laterality variants, documentation tips, and billing notes.
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Low back pain, unspecified
Use M54.51 (vertebrogenic) or M54.59 (other) when etiology is documented
Lumbago with sciatica, right side
Document dermatomal distribution and nerve root involvement
Lumbago with sciatica, left side
Same as above, left side
Spondylosis with radiculopathy, lumbar
Requires imaging confirmation in documentation
Intervertebral disc degeneration, lumbar
Avoid pairing with acute pain codes without context
Rotator cuff syndrome, unspecified shoulder
Specify right (M75.11) or left (M75.12) when known
Bursitis of shoulder, unspecified
Document impingement mechanism when applicable
Adhesive capsulitis (frozen shoulder)
Stage in documentation — freezing, frozen, or thawing phase
Primary osteoarthritis, right knee
M17.12 for left. Document functional limitations driving the referral
Derangement of meniscus, right knee
Specify medial vs. lateral with appropriate 7th character
Presence of right artificial knee joint
Use post-TKA for documenting skilled need in billing
Hemiplegia, unspecified side
Specify affected vs. unaffected; document functional limitations
Paraplegia, unspecified
Use G82.21 (complete) or G82.22 (incomplete) when documented
Parkinson's disease
Pair with functional codes — balance, gait — for billing justification
Multiple sclerosis
Document current functional deficits; heat sensitivity is relevant
Reduced mobility, other
Use as secondary code — must pair with primary diagnosis
Presence of right artificial hip joint
Document post-surgical stage and functional goals
Unsteadiness on feet
Useful secondary code for fall risk documentation in elderly patients
Muscle weakness (generalized)
Use with primary dx; document specific muscle groups and MMT scores
Reference only — always verify ICD-10 codes with your compliance department and payer guidelines. Codes are updated annually by CMS.
Specificity matters — always code to the highest level of detail
Payers increasingly audit unspecified codes. Always use laterality (right, left, bilateral) when you know it from the referral or evaluation.
ICD-10 must support medical necessity
Your ICD-10 code is the 'why' — it must be reflected in your SOAP note with specific functional limitations. A code alone does not establish medical necessity.
Secondary codes add context and billing strength
Adding functional limitation codes (Z74.09, R26.81) alongside the primary diagnosis tells payers why skilled PT is required.
Avoid overly broad codes when more specific ones exist
M54.50 (unspecified LBP) is acceptable, but M54.51 (vertebrogenic) or M54.59 with additional specificity reduces audit risk.
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