M91.10
✓ BillableJuvenile osteochondrosis of head of femur [Legg-Calvé-Perthes], unspecified leg
Diseases of the musculoskeletal system and connective tissue (M00-M99)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • slipped upper femoral epiphysis (nontraumatic) (M93.0-)
Clinical Description
ICD-10-CM code M91.10 represents juvenile osteochondrosis of head of femur [legg-calvé-perthes], unspecified leg. This code falls under the Diseases of the musculoskeletal system and connective tissue (M00-M99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory. Coders should note that M91.10 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code M91.10?
ICD-10-CM code M91.10 is "Juvenile osteochondrosis of head of femur [Legg-Calvé-Perthes], unspecified leg". It belongs to the category: Diseases of the musculoskeletal system and connective tissue (M00-M99).
Is M91.10 a billable ICD-10 code?
Yes, M91.10 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with M91.10?
M91.10 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in M91.1
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)