All ICD10 Codes
Chapter 13

M00–M99: Diseases of the Musculoskeletal System and Connective Tissue

Diseases of the Musculoskeletal System and Connective Tissue diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)
All CodesBillable Only
Internal Codes
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  • M87.373—

    Other secondary osteonecrosis, unspecified ankle

  • M87.374—

    Other secondary osteonecrosis, right foot

  • M87.375—

    Other secondary osteonecrosis, left foot

  • M87.376—

    Other secondary osteonecrosis, unspecified foot

  • M87.377—

    Other secondary osteonecrosis, right toe(s)

  • M87.378—

    Other secondary osteonecrosis, left toe(s)

  • M87.379—

    Other secondary osteonecrosis, unspecified toe(s)

  • M87.38—

    Other secondary osteonecrosis, other site

  • M87.39—

    Other secondary osteonecrosis, multiple sites

  • M87.80—

    Other osteonecrosis, unspecified bone

  • M87.811—

    Other osteonecrosis, right shoulder

  • M87.812—

    Other osteonecrosis, left shoulder

  • M87.819—

    Other osteonecrosis, unspecified shoulder

  • M87.821—

    Other osteonecrosis, right humerus

  • M87.822—

    Other osteonecrosis, left humerus

  • M87.829—

    Other osteonecrosis, unspecified humerus

  • M87.831—

    Other osteonecrosis of right radius

  • M87.832—

    Other osteonecrosis of left radius

  • M87.833—

    Other osteonecrosis of unspecified radius

  • M87.834—

    Other osteonecrosis of right ulna

  • M87.835—

    Other osteonecrosis of left ulna

  • M87.836—

    Other osteonecrosis of unspecified ulna

  • M87.837—

    Other osteonecrosis of right carpus

  • M87.838—

    Other osteonecrosis of left carpus

  • M87.839—

    Other osteonecrosis of unspecified carpus

  • M87.841—

    Other osteonecrosis, right hand

  • M87.842—

    Other osteonecrosis, left hand

  • M87.843—

    Other osteonecrosis, unspecified hand

  • M87.844—

    Other osteonecrosis, right finger(s)

  • M87.845—

    Other osteonecrosis, left finger(s)

  • M87.849—

    Other osteonecrosis, unspecified finger(s)

  • M87.850—

    Other osteonecrosis, pelvis

  • M87.851—

    Other osteonecrosis, right femur

  • M87.852—

    Other osteonecrosis, left femur

  • M87.859—

    Other osteonecrosis, unspecified femur

  • M87.861—

    Other osteonecrosis, right tibia

  • M87.862—

    Other osteonecrosis, left tibia

  • M87.863—

    Other osteonecrosis, unspecified tibia

  • M87.864—

    Other osteonecrosis, right fibula

  • M87.865—

    Other osteonecrosis, left fibula

  • M87.869—

    Other osteonecrosis, unspecified fibula

  • M87.871—

    Other osteonecrosis, right ankle

  • M87.872—

    Other osteonecrosis, left ankle

  • M87.873—

    Other osteonecrosis, unspecified ankle

  • M87.874—

    Other osteonecrosis, right foot

  • M87.875—

    Other osteonecrosis, left foot

  • M87.876—

    Other osteonecrosis, unspecified foot

  • M87.877—

    Other osteonecrosis, right toe(s)

  • M87.878—

    Other osteonecrosis, left toe(s)

  • M87.879—

    Other osteonecrosis, unspecified toe(s)

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