Juvenile osteochondrosis of hip and pelvis (M91)
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.
Diseases of the musculoskeletal system and connective tissue (M00–M99)
Chondropathies (M91-M94)
M91 Juvenile osteochondrosis of hip and pelvis
- M91.0 Juvenile osteochondrosis of pelvis
M91.1 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]
- 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 plana
- M91.20 Coxa plana, unspecified hip
- M91.21 Coxa plana, right hip
- M91.22 Coxa plana, left hip
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
- 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
- M91.82 Other juvenile osteochondrosis of hip and pelvis, left leg
M91.9 Juvenile osteochondrosis of hip and pelvis, unspecified
- 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
Juvenile osteochondrosis of hip and pelvis (M91)
Instructional Notations
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
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
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.
