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)
Internal Codes
  • M89.079

    Algoneurodystrophy, unspecified ankle and foot

  • M89.08

    Algoneurodystrophy, other site

  • M89.09

    Algoneurodystrophy, multiple sites

  • M89.121

    Complete physeal arrest, right proximal humerus

  • M89.122

    Complete physeal arrest, left proximal humerus

  • M89.123

    Partial physeal arrest, right proximal humerus

  • M89.124

    Partial physeal arrest, left proximal humerus

  • M89.125

    Complete physeal arrest, right distal humerus

  • M89.126

    Complete physeal arrest, left distal humerus

  • M89.127

    Partial physeal arrest, right distal humerus

  • M89.128

    Partial physeal arrest, left distal humerus

  • M89.129

    Physeal arrest, humerus, unspecified

  • M89.131

    Complete physeal arrest, right distal radius

  • M89.132

    Complete physeal arrest, left distal radius

  • M89.133

    Partial physeal arrest, right distal radius

  • M89.134

    Partial physeal arrest, left distal radius

  • M89.138

    Other physeal arrest of forearm

  • M89.139

    Physeal arrest, forearm, unspecified

  • M89.151

    Complete physeal arrest, right proximal femur

  • M89.152

    Complete physeal arrest, left proximal femur

  • M89.153

    Partial physeal arrest, right proximal femur

  • M89.154

    Partial physeal arrest, left proximal femur

  • M89.155

    Complete physeal arrest, right distal femur

  • M89.156

    Complete physeal arrest, left distal femur

  • M89.157

    Partial physeal arrest, right distal femur

  • M89.158

    Partial physeal arrest, left distal femur

  • M89.159

    Physeal arrest, femur, unspecified

  • M89.160

    Complete physeal arrest, right proximal tibia

  • M89.161

    Complete physeal arrest, left proximal tibia

  • M89.162

    Partial physeal arrest, right proximal tibia

  • M89.163

    Partial physeal arrest, left proximal tibia

  • M89.164

    Complete physeal arrest, right distal tibia

  • M89.165

    Complete physeal arrest, left distal tibia

  • M89.166

    Partial physeal arrest, right distal tibia

  • M89.167

    Partial physeal arrest, left distal tibia

  • M89.168

    Other physeal arrest of lower leg

  • M89.169

    Physeal arrest, lower leg, unspecified

  • M89.18

    Physeal arrest, other site

  • M89.20

    Other disorders of bone development and growth, unspecified site

  • M89.211

    Other disorders of bone development and growth, right shoulder

  • M89.212

    Other disorders of bone development and growth, left shoulder

  • M89.219

    Other disorders of bone development and growth, unspecified shoulder

  • M89.221

    Other disorders of bone development and growth, right humerus

  • M89.222

    Other disorders of bone development and growth, left humerus

  • M89.229

    Other disorders of bone development and growth, unspecified humerus

  • M89.231

    Other disorders of bone development and growth, right ulna

  • M89.232

    Other disorders of bone development and growth, left ulna

  • M89.233

    Other disorders of bone development and growth, right radius

  • M89.234

    Other disorders of bone development and growth, left radius

  • M89.239

    Other disorders of bone development and growth, unspecified ulna and radius

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