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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  • M61.369—

    Calcification and ossification of muscles associated with burns, unspecified lower leg

  • M61.37—

    Calcification and ossification of muscles associated with burns, ankle and foot

  • M61.371—

    Calcification and ossification of muscles associated with burns, right ankle and foot

  • M61.372—

    Calcification and ossification of muscles associated with burns, left ankle and foot

  • M61.379—

    Calcification and ossification of muscles associated with burns, unspecified ankle and foot

  • M61.38—

    Calcification and ossification of muscles associated with burns, other site

  • M61.39—

    Calcification and ossification of muscles associated with burns, multiple sites

  • M61.4—

    Other calcification of muscle

  • M61.40—

    Other calcification of muscle, unspecified site

  • M61.41—

    Other calcification of muscle, shoulder

  • M61.411—

    Other calcification of muscle, right shoulder

  • M61.412—

    Other calcification of muscle, left shoulder

  • M61.419—

    Other calcification of muscle, unspecified shoulder

  • M61.42—

    Other calcification of muscle, upper arm

  • M61.421—

    Other calcification of muscle, right upper arm

  • M61.422—

    Other calcification of muscle, left upper arm

  • M61.429—

    Other calcification of muscle, unspecified upper arm

  • M61.43—

    Other calcification of muscle, forearm

  • M61.431—

    Other calcification of muscle, right forearm

  • M61.432—

    Other calcification of muscle, left forearm

  • M61.439—

    Other calcification of muscle, unspecified forearm

  • M61.44—

    Other calcification of muscle, hand

  • M61.441—

    Other calcification of muscle, right hand

  • M61.442—

    Other calcification of muscle, left hand

  • M61.449—

    Other calcification of muscle, unspecified hand

  • M61.45—

    Other calcification of muscle, thigh

  • M61.451—

    Other calcification of muscle, right thigh

  • M61.452—

    Other calcification of muscle, left thigh

  • M61.459—

    Other calcification of muscle, unspecified thigh

  • M61.46—

    Other calcification of muscle, lower leg

  • M61.461—

    Other calcification of muscle, right lower leg

  • M61.462—

    Other calcification of muscle, left lower leg

  • M61.469—

    Other calcification of muscle, unspecified lower leg

  • M61.47—

    Other calcification of muscle, ankle and foot

  • M61.471—

    Other calcification of muscle, right ankle and foot

  • M61.472—

    Other calcification of muscle, left ankle and foot

  • M61.479—

    Other calcification of muscle, unspecified ankle and foot

  • M61.48—

    Other calcification of muscle, other site

  • M61.49—

    Other calcification of muscle, multiple sites

  • M61.5—

    Other ossification of muscle

  • M61.50—

    Other ossification of muscle, unspecified site

  • M61.51—

    Other ossification of muscle, shoulder

  • M61.511—

    Other ossification of muscle, right shoulder

  • M61.512—

    Other ossification of muscle, left shoulder

  • M61.519—

    Other ossification of muscle, unspecified shoulder

  • M61.52—

    Other ossification of muscle, upper arm

  • M61.521—

    Other ossification of muscle, right upper arm

  • M61.522—

    Other ossification of muscle, left upper arm

  • M61.529—

    Other ossification of muscle, unspecified upper arm

  • M61.53—

    Other ossification of muscle, forearm

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