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M91.1

M91.1: Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]

Non-billable headerICD-10-CM

M91.1 is a non-billable header ICD-10-CM code for juvenile osteochondrosis of head of femur [legg-calve-perthes]. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M91.1

A category’s note binds every code beneath it.

Written on M91: Juvenile osteochondrosis of hip and pelvis

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

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead M91.1

3 child codes. Green means billable.

Other codes under M91

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.