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
  • M60.073

    Infective myositis, right foot

  • M60.074

    Infective myositis, left foot

  • M60.075

    Infective myositis, unspecified foot

  • M60.076

    Infective myositis, right toe(s)

  • M60.077

    Infective myositis, left toe(s)

  • M60.078

    Infective myositis, unspecified toe(s)

  • M60.08

    Infective myositis, other site

  • M60.09

    Infective myositis, multiple sites

  • M60.10

    Interstitial myositis of unspecified site

  • M60.111

    Interstitial myositis, right shoulder

  • M60.112

    Interstitial myositis, left shoulder

  • M60.119

    Interstitial myositis, unspecified shoulder

  • M60.121

    Interstitial myositis, right upper arm

  • M60.122

    Interstitial myositis, left upper arm

  • M60.129

    Interstitial myositis, unspecified upper arm

  • M60.131

    Interstitial myositis, right forearm

  • M60.132

    Interstitial myositis, left forearm

  • M60.139

    Interstitial myositis, unspecified forearm

  • M60.141

    Interstitial myositis, right hand

  • M60.142

    Interstitial myositis, left hand

  • M60.149

    Interstitial myositis, unspecified hand

  • M60.151

    Interstitial myositis, right thigh

  • M60.152

    Interstitial myositis, left thigh

  • M60.159

    Interstitial myositis, unspecified thigh

  • M60.161

    Interstitial myositis, right lower leg

  • M60.162

    Interstitial myositis, left lower leg

  • M60.169

    Interstitial myositis, unspecified lower leg

  • M60.171

    Interstitial myositis, right ankle and foot

  • M60.172

    Interstitial myositis, left ankle and foot

  • M60.179

    Interstitial myositis, unspecified ankle and foot

  • M60.18

    Interstitial myositis, other site

  • M60.19

    Interstitial myositis, multiple sites

  • M60.20

    Foreign body granuloma of soft tissue, not elsewhere classified, unspecified site

  • M60.211

    Foreign body granuloma of soft tissue, not elsewhere classified, right shoulder

  • M60.212

    Foreign body granuloma of soft tissue, not elsewhere classified, left shoulder

  • M60.219

    Foreign body granuloma of soft tissue, not elsewhere classified, unspecified shoulder

  • M60.221

    Foreign body granuloma of soft tissue, not elsewhere classified, right upper arm

  • M60.222

    Foreign body granuloma of soft tissue, not elsewhere classified, left upper arm

  • M60.229

    Foreign body granuloma of soft tissue, not elsewhere classified, unspecified upper arm

  • M60.231

    Foreign body granuloma of soft tissue, not elsewhere classified, right forearm

  • M60.232

    Foreign body granuloma of soft tissue, not elsewhere classified, left forearm

  • M60.239

    Foreign body granuloma of soft tissue, not elsewhere classified, unspecified forearm

  • M60.241

    Foreign body granuloma of soft tissue, not elsewhere classified, right hand

  • M60.242

    Foreign body granuloma of soft tissue, not elsewhere classified, left hand

  • M60.249

    Foreign body granuloma of soft tissue, not elsewhere classified, unspecified hand

  • M60.251

    Foreign body granuloma of soft tissue, not elsewhere classified, right thigh

  • M60.252

    Foreign body granuloma of soft tissue, not elsewhere classified, left thigh

  • M60.259

    Foreign body granuloma of soft tissue, not elsewhere classified, unspecified thigh

  • M60.261

    Foreign body granuloma of soft tissue, not elsewhere classified, right lower leg

  • M60.262

    Foreign body granuloma of soft tissue, not elsewhere classified, left lower leg

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