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
  • M02.122

    Postdysenteric arthropathy, left elbow

  • M02.129

    Postdysenteric arthropathy, unspecified elbow

  • M02.131

    Postdysenteric arthropathy, right wrist

  • M02.132

    Postdysenteric arthropathy, left wrist

  • M02.139

    Postdysenteric arthropathy, unspecified wrist

  • M02.141

    Postdysenteric arthropathy, right hand

  • M02.142

    Postdysenteric arthropathy, left hand

  • M02.149

    Postdysenteric arthropathy, unspecified hand

  • M02.151

    Postdysenteric arthropathy, right hip

  • M02.152

    Postdysenteric arthropathy, left hip

  • M02.159

    Postdysenteric arthropathy, unspecified hip

  • M02.161

    Postdysenteric arthropathy, right knee

  • M02.162

    Postdysenteric arthropathy, left knee

  • M02.169

    Postdysenteric arthropathy, unspecified knee

  • M02.171

    Postdysenteric arthropathy, right ankle and foot

  • M02.172

    Postdysenteric arthropathy, left ankle and foot

  • M02.179

    Postdysenteric arthropathy, unspecified ankle and foot

  • M02.18

    Postdysenteric arthropathy, vertebrae

  • M02.19

    Postdysenteric arthropathy, multiple sites

  • M02.20

    Postimmunization arthropathy, unspecified site

  • M02.211

    Postimmunization arthropathy, right shoulder

  • M02.212

    Postimmunization arthropathy, left shoulder

  • M02.219

    Postimmunization arthropathy, unspecified shoulder

  • M02.221

    Postimmunization arthropathy, right elbow

  • M02.222

    Postimmunization arthropathy, left elbow

  • M02.229

    Postimmunization arthropathy, unspecified elbow

  • M02.231

    Postimmunization arthropathy, right wrist

  • M02.232

    Postimmunization arthropathy, left wrist

  • M02.239

    Postimmunization arthropathy, unspecified wrist

  • M02.241

    Postimmunization arthropathy, right hand

  • M02.242

    Postimmunization arthropathy, left hand

  • M02.249

    Postimmunization arthropathy, unspecified hand

  • M02.251

    Postimmunization arthropathy, right hip

  • M02.252

    Postimmunization arthropathy, left hip

  • M02.259

    Postimmunization arthropathy, unspecified hip

  • M02.261

    Postimmunization arthropathy, right knee

  • M02.262

    Postimmunization arthropathy, left knee

  • M02.269

    Postimmunization arthropathy, unspecified knee

  • M02.271

    Postimmunization arthropathy, right ankle and foot

  • M02.272

    Postimmunization arthropathy, left ankle and foot

  • M02.279

    Postimmunization arthropathy, unspecified ankle and foot

  • M02.28

    Postimmunization arthropathy, vertebrae

  • M02.29

    Postimmunization arthropathy, multiple sites

  • M02.30

    Reiter's disease, unspecified site

  • M02.311

    Reiter's disease, right shoulder

  • M02.312

    Reiter's disease, left shoulder

  • M02.319

    Reiter's disease, unspecified shoulder

  • M02.321

    Reiter's disease, right elbow

  • M02.322

    Reiter's disease, left elbow

  • M02.329

    Reiter's disease, unspecified elbow

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