ICD-10-CM 2027 diagnosis code

M91Juvenile osteochondrosis of hip and pelvis

Not billable — use a more specific code

M91 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M91

M91 is the ICD-10-CM diagnosis code for juvenile osteochondrosis of hip and pelvis. It belongs to block M91-M94 (Chondropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: M91.0 (pelvis), M91.1 ([Legg-Calve-Perthes]), M91.2 (plana), M91.3 (Pseudocoxalgia), M91.4 (magna), M91.8 (pelvis) and M91.9 (unspecified).

Don't report M91 together with the conditions in its Excludes1 note: slipped upper femoral epiphysis (nontraumatic) (M93.0-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under M91

Coding notes

Excludes1Not coded here — never report together with this code

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

Notes that apply from higher levels

Instructions written at a parent level also apply to M91.

Broader instructions also apply from M91-M94 Chondropathies and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Codes whose notes reference M91

M87Excludes1

Code history

2016
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2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about M91

Is M91 billable?: No. M91 is a header code. Report one of its more specific subcodes instead.