ICD-10 Code for Osteoarthritis

The ICD-10-CM code for osteoarthritis is M19.90 — Unspecified osteoarthritis, unspecified site. This is the code the Alphabetic Index gives for osteoarthritis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

BillableUnspecified

M19.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.

Which osteoarthritis code should you use?

The Alphabetic Index lists 52 codes under Osteoarthritis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

ankle	M19.07Not billable	Primary osteoarthritis ankle and foot
elbow	M19.02Not billable	Primary osteoarthritis, elbow
foot joint	M19.07Not billable	Primary osteoarthritis ankle and foot
generalized	M15.9	Polyosteoarthritis, unspecified
hand joint	M19.04Not billable	Primary osteoarthritis, hand
hip	M16.9	Osteoarthritis of hip, unspecified
knee	M17.9	Osteoarthritis of knee, unspecified
post-traumatic NEC	M19.92	Post-traumatic osteoarthritis, unspecified site
primary	M19.91	Primary osteoarthritis, unspecified site
secondary	M19.93	Secondary osteoarthritis, unspecified site
shoulder	M19.01Not billable	Primary osteoarthritis, shoulder
specified site NEC	M19.09	Primary osteoarthritis, other specified site
wrist	M19.03Not billable	Primary osteoarthritis, wrist

Osteoarthritis ankle

post-traumatic	M19.17Not billable	Post-traumatic osteoarthritis, ankle and foot
primary	M19.07Not billable	Primary osteoarthritis ankle and foot
secondary	M19.27Not billable	Secondary osteoarthritis, ankle and foot

Osteoarthritis elbow

post-traumatic	M19.12Not billable	Post-traumatic osteoarthritis, elbow
primary	M19.02Not billable	Primary osteoarthritis, elbow
secondary	M19.22Not billable	Secondary osteoarthritis, elbow

Osteoarthritis foot joint

post-traumatic	M19.17Not billable	Post-traumatic osteoarthritis, ankle and foot
primary	M19.07Not billable	Primary osteoarthritis ankle and foot
secondary	M19.27Not billable	Secondary osteoarthritis, ankle and foot

Osteoarthritis generalized

erosive	M15.4	Erosive (osteo)arthritis
primary	M15.0	Primary generalized (osteo)arthritis
specified NEC	M15.8	Other polyosteoarthritis

Osteoarthritis hand joint

first carpometacarpal joint	M18.9	Osteoarthritis of first carpometacarpal joint, unspecified
post-traumatic	M19.14Not billable	Post-traumatic osteoarthritis, hand
primary	M19.04Not billable	Primary osteoarthritis, hand
secondary	M19.24Not billable	Secondary osteoarthritis, hand

Osteoarthritis hip

bilateral	M16.0	Bilateral primary osteoarthritis of hip
due to hip dysplasia	M16.3Not billable	Unilateral osteoarthritis resulting from hip dysplasia
primary	M16.1Not billable	Unilateral primary osteoarthritis of hip
unilateral	M16.1Not billable	Unilateral primary osteoarthritis of hip
bilateral › due to hip dysplasia	M16.2	Bilateral osteoarthritis resulting from hip dysplasia
bilateral › post-traumatic	M16.4	Bilateral post-traumatic osteoarthritis of hip
bilateral › secondary	M16.6	Other bilateral secondary osteoarthritis of hip
due to hip dysplasia › bilateral	M16.2	Bilateral osteoarthritis resulting from hip dysplasia
primary › bilateral	M16.0	Bilateral primary osteoarthritis of hip
unilateral › due to hip dysplasia	M16.3Not billable	Unilateral osteoarthritis resulting from hip dysplasia
unilateral › post-traumatic	M16.5Not billable	Unilateral post-traumatic osteoarthritis of hip
unilateral › primary	M16.1Not billable	Unilateral primary osteoarthritis of hip
unilateral › secondary NEC	M16.7	Other unilateral secondary osteoarthritis of hip

Osteoarthritis interphalangeal

distal	M15.1	Heberden's nodes (with arthropathy)
proximal	M15.2	Bouchard's nodes (with arthropathy)

Osteoarthritis knee

bilateral	M17.0	Bilateral primary osteoarthritis of knee
primary	M17.1Not billable	Unilateral primary osteoarthritis of knee
unilateral	M17.1Not billable	Unilateral primary osteoarthritis of knee
bilateral › post-traumatic	M17.2	Bilateral post-traumatic osteoarthritis of knee
bilateral › secondary	M17.4	Other bilateral secondary osteoarthritis of knee
primary › bilateral	M17.0	Bilateral primary osteoarthritis of knee
unilateral › post-traumatic	M17.3Not billable	Unilateral post-traumatic osteoarthritis of knee
unilateral › primary	M17.1Not billable	Unilateral primary osteoarthritis of knee
unilateral › secondary NEC	M17.5	Other unilateral secondary osteoarthritis of knee

Osteoarthritis post-traumatic NEC

ankle	M19.17Not billable	Post-traumatic osteoarthritis, ankle and foot
elbow	M19.12Not billable	Post-traumatic osteoarthritis, elbow
foot joint	M19.17Not billable	Post-traumatic osteoarthritis, ankle and foot
hand joint	M19.14Not billable	Post-traumatic osteoarthritis, hand
hip	M16.5Not billable	Unilateral post-traumatic osteoarthritis of hip
knee	M17.3Not billable	Unilateral post-traumatic osteoarthritis of knee
shoulder	M19.11Not billable	Post-traumatic osteoarthritis, shoulder
specified site NEC	M19.19	Post-traumatic osteoarthritis, other specified site
wrist	M19.13Not billable	Post-traumatic osteoarthritis, wrist
hand joint › first carpometacarpal joint	M18.3Not billable	Unilateral post-traumatic osteoarthritis of first carpometacarpal joint
hip › bilateral	M16.4	Bilateral post-traumatic osteoarthritis of hip
knee › bilateral	M17.2	Bilateral post-traumatic osteoarthritis of knee
hand joint › first carpometacarpal joint › bilateral	M18.2	Bilateral post-traumatic osteoarthritis of first carpometacarpal joints

Osteoarthritis primary

ankle	M19.07Not billable	Primary osteoarthritis ankle and foot
elbow	M19.02Not billable	Primary osteoarthritis, elbow
foot joint	M19.07Not billable	Primary osteoarthritis ankle and foot
hand joint	M19.04Not billable	Primary osteoarthritis, hand
hip	M16.1Not billable	Unilateral primary osteoarthritis of hip
knee	M17.1Not billable	Unilateral primary osteoarthritis of knee
multiple sites	M15.9	Polyosteoarthritis, unspecified
shoulder	M19.01Not billable	Primary osteoarthritis, shoulder
specified site NEC	M19.09	Primary osteoarthritis, other specified site
wrist	M19.03Not billable	Primary osteoarthritis, wrist
hand joint › first carpometacarpal joint	M18.1Not billable	Unilateral primary osteoarthritis of first carpometacarpal joint
hip › bilateral	M16.0	Bilateral primary osteoarthritis of hip
knee › bilateral	M17.0	Bilateral primary osteoarthritis of knee
hand joint › first carpometacarpal joint › bilateral	M18.0	Bilateral primary osteoarthritis of first carpometacarpal joints

Osteoarthritis secondary

ankle	M19.27Not billable	Secondary osteoarthritis, ankle and foot
elbow	M19.22Not billable	Secondary osteoarthritis, elbow
foot joint	M19.27Not billable	Secondary osteoarthritis, ankle and foot
hand joint	M19.24Not billable	Secondary osteoarthritis, hand
hip	M16.7	Other unilateral secondary osteoarthritis of hip
knee	M17.5	Other unilateral secondary osteoarthritis of knee
multiple	M15.3	Secondary multiple arthritis
shoulder	M19.21Not billable	Secondary osteoarthritis, shoulder
specified site NEC	M19.29	Secondary osteoarthritis, other specified site
wrist	M19.23Not billable	Secondary osteoarthritis, wrist
hand joint › first carpometacarpal joint	M18.5Not billable	Other unilateral secondary osteoarthritis of first carpometacarpal joint
hip › bilateral	M16.6	Other bilateral secondary osteoarthritis of hip
knee › bilateral	M17.4	Other bilateral secondary osteoarthritis of knee
hand joint › first carpometacarpal joint › bilateral	M18.4	Other bilateral secondary osteoarthritis of first carpometacarpal joints

Osteoarthritis shoulder

post-traumatic	M19.11Not billable	Post-traumatic osteoarthritis, shoulder
primary	M19.01Not billable	Primary osteoarthritis, shoulder
secondary	M19.21Not billable	Secondary osteoarthritis, shoulder

Osteoarthritis wrist

post-traumatic	M19.13Not billable	Post-traumatic osteoarthritis, wrist
primary	M19.03Not billable	Primary osteoarthritis, wrist
secondary	M19.23Not billable	Secondary osteoarthritis, wrist

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources