Juvenile osteochondrosis of hip and pelvis (M91) ICD-10-CM
The M91 code range covers juvenile osteochondrosis of hip and pelvis with 26 ICD-10-CM diagnosis codes. 19 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- slipped upper femoral epiphysis nontraumatic M93.0
Codes in the M91 Range 26 codes · 19 billable
- M91 Juvenile osteochondrosis of hip and pelvisNon-billable
- M91.0 Juvenile osteochondrosis of pelvis
- M91.1 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]Non-billable
- M91.10 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], unspecified leg
- M91.11 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], right leg
- M91.12 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], left leg
- M91.2 Coxa planaNon-billable
- M91.20 Coxa plana, unspecified hip
- M91.21 Coxa plana, right hip
- M91.22 Coxa plana, left hip
- M91.3 PseudocoxalgiaNon-billable
- M91.30 Pseudocoxalgia, unspecified hip
- M91.31 Pseudocoxalgia, right hip
- M91.32 Pseudocoxalgia, left hip
- M91.4 Coxa magnaNon-billable
- M91.40 Coxa magna, unspecified hip
- M91.41 Coxa magna, right hip
- M91.42 Coxa magna, left hip
- M91.8 Other juvenile osteochondrosis of hip and pelvisNon-billable
- M91.80 Other juvenile osteochondrosis of hip and pelvis, unspecified leg
- M91.81 Other juvenile osteochondrosis of hip and pelvis, right leg
- M91.82 Other juvenile osteochondrosis of hip and pelvis, left leg
- M91.9 Juvenile osteochondrosis of hip and pelvis, unspecifiedNon-billable
- M91.90 Juvenile osteochondrosis of hip and pelvis, unspecified, unspecified leg
- M91.91 Juvenile osteochondrosis of hip and pelvis, unspecified, right leg
- M91.92 Juvenile osteochondrosis of hip and pelvis, unspecified, left leg
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the M91 range.
Coxa Magna
Deformity of the hip characterized by enlargement and deformation of the FEMUR HEAD and FEMUR NECK, often with associated changes in the ACETABULUM. These changes may be secondary to other diseases (e.g. LEGG-PERTHES DISEASE; ARTHRITIS; HIP DISLOCATION, CONGENITAL) or TRAUMA.
About the M91 Code Range
Juvenile osteochondrosis of hip and pelvis (ICD-10 code M91) includes conditions affecting the growth and development of bones in children, specifically involving the hip and pelvic region. These codes cover several disorders such as Legg-Calve-Perthes disease and various types of osteochondrosis impacting different parts of the pelvis and femur.
This section details subcodes for specific forms like M91.0 for juvenile osteochondrosis of the pelvis, covering conditions known as juvenile osteochondrosis of acetabulum, ischiopubic synchondrosis, and others. The code M91.1 includes Legg-Calve-Perthes disease, a juvenile osteochondrosis of the femoral head, with further distinction by affected leg (M91.10–M91.12). Other notable codes include M91.2 for coxa plana and M91.4 for coxa magna, which denote specific hip deformities. Unspecified and other variant juvenile osteochondroses of the hip and pelvis also have dedicated codes (M91.8, M91.9). These codes are used primarily for diagnosing and documenting juvenile bone growth disorders in the hip/pelvic area with an emphasis on specifying location and laterality to guide treatment and insurance claims correctly.
Questions About This Page
How many billable codes are in the M91 range?
Of the 26 codes in this range, 19 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the M91 range classify?
The range classifies juvenile osteochondrosis of hip and pelvis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
