M91.40 Coxa magna, unspecified hip

Billable ICD-10-CM code, FY2026.

Applies from M91 Juvenile osteochondrosis of hip and pelvis

Excludes1 (never code together)

• slipped upper femoral epiphysis (nontraumatic) (M93.0-)

MS-DRG index

Defines the logic of DRG(s) 553-554 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 732.1 Juvenile osteochondrosis of hip and pelvis (approximate)

Code annotations containing back-references to M91.40

Back-references to M91

• Type 1 Excludes: M87 Osteonecrosis ("juvenile osteonecrosis (M91-M92)")
• Type 1 Excludes: M87 Osteonecrosis ("osteochondropathies (M90-M93)")

Nearby codes

• M91.3 Pseudocoxalgia
• M91.30 Pseudocoxalgia, unspecified hip
• M91.31 Pseudocoxalgia, right hip
• M91.32 Pseudocoxalgia, left hip
• M91.4 Coxa magna
• M91.40 Coxa magna, unspecified hip (this code)
• M91.41 Coxa magna, right hip
• M91.42 Coxa magna, left hip
• M91.8 Other juvenile osteochondrosis of hip and pelvis
• M91.80 Other juvenile osteochondrosis of hip and pelvis, unspecified leg
• M91.81 Other juvenile osteochondrosis of hip and pelvis, right leg