M91.1

Non-billable

Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]

M91.1 is the ICD-10-CM code for Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]. It is a non-billable category code — use a more specific child code such as M91.10 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M91
Subcodes
3
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code M91.1?
M91.1 is the ICD-10-CM code for "Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M91.1 a billable code?
No — M91.1 is a non-billable header code. Use a more specific child code (such as M91.10) for billing.
What are the subcodes of M91.1?
M91.1 has 3 more specific child codes, including M91.10, M91.11, M91.12.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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