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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  • M90.552—

    Osteonecrosis in diseases classified elsewhere, left thigh

  • M90.559—

    Osteonecrosis in diseases classified elsewhere, unspecified thigh

  • M90.56—

    Osteonecrosis in diseases classified elsewhere, lower leg

  • M90.561—

    Osteonecrosis in diseases classified elsewhere, right lower leg

  • M90.562—

    Osteonecrosis in diseases classified elsewhere, left lower leg

  • M90.569—

    Osteonecrosis in diseases classified elsewhere, unspecified lower leg

  • M90.57—

    Osteonecrosis in diseases classified elsewhere, ankle and foot

  • M90.571—

    Osteonecrosis in diseases classified elsewhere, right ankle and foot

  • M90.572—

    Osteonecrosis in diseases classified elsewhere, left ankle and foot

  • M90.579—

    Osteonecrosis in diseases classified elsewhere, unspecified ankle and foot

  • M90.58—

    Osteonecrosis in diseases classified elsewhere, other site

  • M90.59—

    Osteonecrosis in diseases classified elsewhere, multiple sites

  • M90.6—

    Osteitis deformans in neoplastic diseases

  • M90.60—

    Osteitis deformans in neoplastic diseases, unspecified site

  • M90.61—

    Osteitis deformans in neoplastic diseases, shoulder

  • M90.611—

    Osteitis deformans in neoplastic diseases, right shoulder

  • M90.612—

    Osteitis deformans in neoplastic diseases, left shoulder

  • M90.619—

    Osteitis deformans in neoplastic diseases, unspecified shoulder

  • M90.62—

    Osteitis deformans in neoplastic diseases, upper arm

  • M90.621—

    Osteitis deformans in neoplastic diseases, right upper arm

  • M90.622—

    Osteitis deformans in neoplastic diseases, left upper arm

  • M90.629—

    Osteitis deformans in neoplastic diseases, unspecified upper arm

  • M90.63—

    Osteitis deformans in neoplastic diseases, forearm

  • M90.631—

    Osteitis deformans in neoplastic diseases, right forearm

  • M90.632—

    Osteitis deformans in neoplastic diseases, left forearm

  • M90.639—

    Osteitis deformans in neoplastic diseases, unspecified forearm

  • M90.64—

    Osteitis deformans in neoplastic diseases, hand

  • M90.641—

    Osteitis deformans in neoplastic diseases, right hand

  • M90.642—

    Osteitis deformans in neoplastic diseases, left hand

  • M90.649—

    Osteitis deformans in neoplastic diseases, unspecified hand

  • M90.65—

    Osteitis deformans in neoplastic diseases, thigh

  • M90.651—

    Osteitis deformans in neoplastic diseases, right thigh

  • M90.652—

    Osteitis deformans in neoplastic diseases, left thigh

  • M90.659—

    Osteitis deformans in neoplastic diseases, unspecified thigh

  • M90.66—

    Osteitis deformans in neoplastic diseases, lower leg

  • M90.661—

    Osteitis deformans in neoplastic diseases, right lower leg

  • M90.662—

    Osteitis deformans in neoplastic diseases, left lower leg

  • M90.669—

    Osteitis deformans in neoplastic diseases, unspecified lower leg

  • M90.67—

    Osteitis deformans in neoplastic diseases, ankle and foot

  • M90.671—

    Osteitis deformans in neoplastic diseases, right ankle and foot

  • M90.672—

    Osteitis deformans in neoplastic diseases, left ankle and foot

  • M90.679—

    Osteitis deformans in neoplastic diseases, unspecified ankle and foot

  • M90.68—

    Osteitis deformans in neoplastic diseases, other site

  • M90.69—

    Osteitis deformans in neoplastic diseases, multiple sites

  • M90.8—

    Osteopathy in diseases classified elsewhere

  • M90.80—

    Osteopathy in diseases classified elsewhere, unspecified site

  • M90.81—

    Osteopathy in diseases classified elsewhere, shoulder

  • M90.811—

    Osteopathy in diseases classified elsewhere, right shoulder

  • M90.812—

    Osteopathy in diseases classified elsewhere, left shoulder

  • M90.819—

    Osteopathy in diseases classified elsewhere, unspecified shoulder

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