ICD-10-CM

Non-billable

M91

Classification

Category:Diseases of the musculoskeletal system and connective tissue

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Coding Guidance

M91 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Excludes 1

M93.0

slipped upper femoral epiphysis (nontraumatic)

Excludes 2

L40.5

arthropathic psoriasis

P04-P96

certain conditions originating in the perinatal period

A00-B99

certain infectious and parasitic diseases

T79.A

compartment syndrome (traumatic)

O00-O9A

complications of pregnancy, childbirth and the puerperium

Q00-Q99

congenital malformations, deformations, and chromosomal abnormalities

E00-E88

endocrine, nutritional and metabolic diseases

S00-T88

injury, poisoning and certain other consequences of external causes

C00-D49

neoplasms

R00-R94

symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Use Additional Code

From M00-M99

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

More Specific Codes

M91.0

Juvenile osteochondrosis of pelvis

M91.1

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

Other juvenile osteochondrosis of hip and pelvis

M91.9

Juvenile osteochondrosis of hip and pelvis, unspecified

External Resources

2025 ICD-10 guidelines from CMS.gov