M91.2
Non-billableCoxa plana
Coxa plana
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Hip deformity due to previous juvenile osteochondrosis
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •arthropathic psoriasisL40.5
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •compartment syndrome (traumatic)A-)T79
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
Child Codes (3)
Related Codes(6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(4)
Frequently Asked Questions
What is the ICD-10 code for coxa plana?
The ICD-10-CM code for coxa plana is M91.2. The full clinical description is "Coxa plana". M91.2 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code M91.2 mean?
ICD-10-CM code M91.2 represents “Coxa plana”. It is classified under Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue and is a non-billable header code. Use a more specific child code for billing purposes.
Is M91.2 a billable code?
No, M91.2 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 3 child codes under M91.2.
What chapter is M91.2 in?
M91.2 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What codes cannot be used with M91.2?
M91.2 has Excludes1 notes indicating codes that cannot be used together with it, including: postprocedural chondropathies (M96.-); slipped upper femoral epiphysis (nontraumatic) (M93.0-).
What are the subcategories under M91.2?
M91.2 has 3 child codes, including: M91.20 (Coxa plana, unspecified hip), M91.21 (Coxa plana, right hip), M91.22 (Coxa plana, left hip).
What are the UMLS CUIs for M91.2?
M91.2 is linked to 2 UMLS Concept Unique Identifiers: C0023234, C1399653. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does M91.2 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like coxa plana affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of M91.2?
M91.2 maps to the ICD-11 code: FB82.1 (Osteochondrosis or osteochondritis dissecans).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.