ICD-10 · PDGM grouping

M15-M19 — Osteoarthritis

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.

OASIS-E2 v1.00.0 · ingested 2026-04-26

Codes in range

No clinical group

A period cannot be grouped from these.

Barred as primary

CMS rejects these in the primary position.

Where these codes group

68 of the 98 codes in M15-M19 group to Musculoskeletal Rehabilitation. A further 30 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.

EMusculoskeletal Rehabilitation68

Every code in M15-M19

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

Code	Description	Clinical group	Primary position
M150	Primary generalized (osteo)arthritis	E	Accepted
M151	Heberden's nodes (with arthropathy)	E	Accepted
M152	Bouchard's nodes (with arthropathy)	E	Accepted
M153	Secondary multiple arthritis	E	Accepted
M154	Erosive (osteo)arthritis	E	Accepted
M158	Other polyosteoarthritis	E	Accepted
M159	Polyosteoarthritis, unspecified	E	Accepted
M160	Bilateral primary osteoarthritis of hip	E	Accepted
M1610	Unilateral primary osteoarthritis, unspecified hip	None	Cannot group
M1611	Unilateral primary osteoarthritis, right hip	E	Accepted
M1612	Unilateral primary osteoarthritis, left hip	E	Accepted
M162	Bilateral osteoarthritis resulting from hip dysplasia	E	Accepted
M1630	Unilateral osteoarth resulting from hip dysplasia, unsp hip	None	Cannot group
M1631	Unilateral osteoarth resulting from hip dysplasia, right hip	E	Accepted
M1632	Unilateral osteoarth resulting from hip dysplasia, left hip	E	Accepted
M164	Bilateral post-traumatic osteoarthritis of hip	E	Accepted
M1650	Unilateral post-traumatic osteoarthritis, unspecified hip	None	Cannot group
M1651	Unilateral post-traumatic osteoarthritis, right hip	E	Accepted
M1652	Unilateral post-traumatic osteoarthritis, left hip	E	Accepted
M166	Other bilateral secondary osteoarthritis of hip	E	Accepted
M167	Other unilateral secondary osteoarthritis of hip	E	Accepted
M169	Osteoarthritis of hip, unspecified	None	Cannot group
M170	Bilateral primary osteoarthritis of knee	E	Accepted
M1710	Unilateral primary osteoarthritis, unspecified knee	None	Cannot group
M1711	Unilateral primary osteoarthritis, right knee	E	Accepted
M1712	Unilateral primary osteoarthritis, left knee	E	Accepted
M172	Bilateral post-traumatic osteoarthritis of knee	E	Accepted
M1730	Unilateral post-traumatic osteoarthritis, unspecified knee	None	Cannot group
M1731	Unilateral post-traumatic osteoarthritis, right knee	E	Accepted
M1732	Unilateral post-traumatic osteoarthritis, left knee	E	Accepted
M174	Other bilateral secondary osteoarthritis of knee	E	Accepted
M175	Other unilateral secondary osteoarthritis of knee	E	Accepted
M179	Osteoarthritis of knee, unspecified	None	Cannot group
M180	Bilateral primary osteoarth of first carpometacarp joints	E	Accepted
M1810	Unil prim osteoarth of first carpometacarp joint, unsp hand	None	Cannot group
M1811	Unil primary osteoarth of first carpometacarp joint, r hand	E	Accepted
M1812	Unil primary osteoarth of first carpometacarp joint, l hand	E	Accepted
M182	Bi post-trauma osteoarth of first carpometacarp joints	E	Accepted
M1830	Unil post-trauma osteoarth of 1st carpometacarp jt,unsp hand	None	Cannot group
M1831	Unil post-trauma osteoarth of 1st carpometacarp jt, r hand	E	Accepted
M1832	Unil post-trauma osteoarth of 1st carpometacarp jt, l hand	E	Accepted
M184	Oth bi secondary osteoarth of first carpometacarp joints	E	Accepted
M1850	Oth unil sec osteoarth of 1st carpometacarp joint, unsp hand	None	Cannot group
M1851	Oth unil sec osteoarth of first carpometacarp joint, r hand	E	Accepted
M1852	Oth unil sec osteoarth of first carpometacarp joint, l hand	E	Accepted
M189	Osteoarthritis of first carpometacarpal joint, unspecified	None	Cannot group
M19011	Primary osteoarthritis, right shoulder	E	Accepted
M19012	Primary osteoarthritis, left shoulder	E	Accepted
M19019	Primary osteoarthritis, unspecified shoulder	None	Cannot group
M19021	Primary osteoarthritis, right elbow	E	Accepted
M19022	Primary osteoarthritis, left elbow	E	Accepted
M19029	Primary osteoarthritis, unspecified elbow	None	Cannot group
M19031	Primary osteoarthritis, right wrist	E	Accepted
M19032	Primary osteoarthritis, left wrist	E	Accepted
M19039	Primary osteoarthritis, unspecified wrist	None	Cannot group
M19041	Primary osteoarthritis, right hand	E	Accepted
M19042	Primary osteoarthritis, left hand	E	Accepted
M19049	Primary osteoarthritis, unspecified hand	None	Cannot group
M19071	Primary osteoarthritis, right ankle and foot	E	Accepted
M19072	Primary osteoarthritis, left ankle and foot	E	Accepted
M19079	Primary osteoarthritis, unspecified ankle and foot	None	Cannot group
M1909	Primary osteoarthritis, other specified site	E	Accepted
M19111	Post-traumatic osteoarthritis, right shoulder	E	Accepted
M19112	Post-traumatic osteoarthritis, left shoulder	E	Accepted
M19119	Post-traumatic osteoarthritis, unspecified shoulder	None	Cannot group
M19121	Post-traumatic osteoarthritis, right elbow	E	Accepted
M19122	Post-traumatic osteoarthritis, left elbow	E	Accepted
M19129	Post-traumatic osteoarthritis, unspecified elbow	None	Cannot group
M19131	Post-traumatic osteoarthritis, right wrist	E	Accepted
M19132	Post-traumatic osteoarthritis, left wrist	E	Accepted
M19139	Post-traumatic osteoarthritis, unspecified wrist	None	Cannot group
M19141	Post-traumatic osteoarthritis, right hand	E	Accepted
M19142	Post-traumatic osteoarthritis, left hand	E	Accepted
M19149	Post-traumatic osteoarthritis, unspecified hand	None	Cannot group
M19171	Post-traumatic osteoarthritis, right ankle and foot	E	Accepted
M19172	Post-traumatic osteoarthritis, left ankle and foot	E	Accepted
M19179	Post-traumatic osteoarthritis, unspecified ankle and foot	None	Cannot group
M1919	Post-traumatic osteoarthritis, other specified site	E	Accepted
M19211	Secondary osteoarthritis, right shoulder	E	Accepted
M19212	Secondary osteoarthritis, left shoulder	E	Accepted
M19219	Secondary osteoarthritis, unspecified shoulder	None	Cannot group
M19221	Secondary osteoarthritis, right elbow	E	Accepted
M19222	Secondary osteoarthritis, left elbow	E	Accepted
M19229	Secondary osteoarthritis, unspecified elbow	None	Cannot group
M19231	Secondary osteoarthritis, right wrist	E	Accepted
M19232	Secondary osteoarthritis, left wrist	E	Accepted
M19239	Secondary osteoarthritis, unspecified wrist	None	Cannot group
M19241	Secondary osteoarthritis, right hand	E	Accepted
M19242	Secondary osteoarthritis, left hand	E	Accepted
M19249	Secondary osteoarthritis, unspecified hand	None	Cannot group
M19271	Secondary osteoarthritis, right ankle and foot	E	Accepted
M19272	Secondary osteoarthritis, left ankle and foot	E	Accepted
M19279	Secondary osteoarthritis, unspecified ankle and foot	None	Cannot group
M1929	Secondary osteoarthritis, other specified site	E	Accepted
M1990	Unspecified osteoarthritis, unspecified site	None	Cannot group
M1991	Primary osteoarthritis, unspecified site	None	Cannot group
M1992	Post-traumatic osteoarthritis, unspecified site	None	Cannot group
M1993	Secondary osteoarthritis, unspecified site	None	Cannot group

Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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M15-M19 — Osteoarthritis

Where these codes group

Every code in M15-M19

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