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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  • M87.875—

    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)

  • M87.88—

    Other osteonecrosis, other site

  • M87.89—

    Other osteonecrosis, multiple sites

  • M87.9—

    Osteonecrosis, unspecified

  • M88—

    Osteitis deformans [Paget's disease of bone]

  • M88.0—

    Osteitis deformans of skull

  • M88.1—

    Osteitis deformans of vertebrae

  • M88.8—

    Osteitis deformans of other bones

  • M88.81—

    Osteitis deformans of shoulder

  • M88.811—

    Osteitis deformans of right shoulder

  • M88.812—

    Osteitis deformans of left shoulder

  • M88.819—

    Osteitis deformans of unspecified shoulder

  • M88.82—

    Osteitis deformans of upper arm

  • M88.821—

    Osteitis deformans of right upper arm

  • M88.822—

    Osteitis deformans of left upper arm

  • M88.829—

    Osteitis deformans of unspecified upper arm

  • M88.83—

    Osteitis deformans of forearm

  • M88.831—

    Osteitis deformans of right forearm

  • M88.832—

    Osteitis deformans of left forearm

  • M88.839—

    Osteitis deformans of unspecified forearm

  • M88.84—

    Osteitis deformans of hand

  • M88.841—

    Osteitis deformans of right hand

  • M88.842—

    Osteitis deformans of left hand

  • M88.849—

    Osteitis deformans of unspecified hand

  • M88.85—

    Osteitis deformans of thigh

  • M88.851—

    Osteitis deformans of right thigh

  • M88.852—

    Osteitis deformans of left thigh

  • M88.859—

    Osteitis deformans of unspecified thigh

  • M88.86—

    Osteitis deformans of lower leg

  • M88.861—

    Osteitis deformans of right lower leg

  • M88.862—

    Osteitis deformans of left lower leg

  • M88.869—

    Osteitis deformans of unspecified lower leg

  • M88.87—

    Osteitis deformans of ankle and foot

  • M88.871—

    Osteitis deformans of right ankle and foot

  • M88.872—

    Osteitis deformans of left ankle and foot

  • M88.879—

    Osteitis deformans of unspecified ankle and foot

  • M88.88—

    Osteitis deformans of other bones

  • M88.89—

    Osteitis deformans of multiple sites

  • M88.9—

    Osteitis deformans of unspecified bone

  • M89—

    Other disorders of bone

  • M89.0—

    Algoneurodystrophy

  • M89.00—

    Algoneurodystrophy, unspecified site

  • M89.01—

    Algoneurodystrophy, shoulder

  • M89.011—

    Algoneurodystrophy, right shoulder

  • M89.012—

    Algoneurodystrophy, left shoulder

  • M89.019—

    Algoneurodystrophy, unspecified shoulder

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