M91.4 – Coxa magna
ICD-10-CM 2027 diagnosis code · Chondropathies
ICD-10-CM code
M91.4
- Code
M91.4(claims format:M914)- Description
- Coxa magna
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M91-M94 Chondropathies
- Parent codes
- M91
Billable codes under M91.4
M91.4 is a header code and cannot be used on claims. Choose the most specific code:
- M91.40 – Coxa magna, unspecified hipBillable
- M91.41 – Coxa magna, right hipBillable
- M91.42 – Coxa magna, left hipBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M91 – Juvenile osteochondrosis of hip and pelvis
Excludes1 (not coded here):
- slipped upper femoral epiphysis (nontraumatic) (M93.0-)
Block M91-M94
Excludes1 (not coded here):
- postprocedural chondropathies (M96.-)
Index terms for M91.4
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M91
- M91.0 – Juvenile osteochondrosis of pelvisBillable
- M91.1 – Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]Header
- M91.2 – Coxa planaHeader
- M91.3 – PseudocoxalgiaHeader
- M91.8 – Other juvenile osteochondrosis of hip and pelvisHeader
- M91.9 – Juvenile osteochondrosis of hip and pelvis, unspecifiedHeader
Frequently asked questions
What is ICD-10 code M91.4?
M91.4 is the ICD-10-CM code for coxa magna, in the block M91-M94 (Chondropathies).
Is M91.4 a billable code?
No. M91.4 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M91.4 belong to?
It belongs to category M91 – Juvenile osteochondrosis of hip and pelvis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.