M87.37

Other secondary osteonecrosis, ankle and foot

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This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from M87Osteonecrosis
Includes

avascular necrosis of bone

Excludes 1

juvenile osteonecrosis (M91-M92) osteochondropathies (M90-M93)

Use additional

code to identify major osseous defect, if applicable (M89.7-)

Inherited from M86-M90Other osteopathies
Excludes 1

postprocedural osteopathies (M96.-)

Inherited from chapter 13Diseases of the musculoskeletal system and connective tissue
Excludes 2

arthropathic psoriasis (L40.5-) certain conditions originating in the perinatal period (P04-P96) certain infectious and parasitic diseases (A00-B99) compartment syndrome (traumatic) (T79.A-) complications of pregnancy, childbirth and the puerperium (O00-O9A) congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Note

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition (M00-M25) Arthropathies (M00-M25) Includes: Disorders affecting predominantly peripheral (limb) joints (M40-M54) Dorsopathies (M40-M54) (M60-M79) Soft tissue disorders (M60-M79) (M80-M94) Osteopathies and chondropathies (M80-M94)

Official Guidelines for M87.37

FY 2026 ›
I.C.13Chapter-specific guidanceChapter 13: Diseases of the Musculoskeletal System and Connective

Subsections

Sections that reference M87.37

Sections whose FY 2026 text names M87.37, its M87 category, or a range containing it — the chapter guidance above is the authoritative source.