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
  • M24.232

    Disorder of ligament, left wrist

  • M24.239

    Disorder of ligament, unspecified wrist

  • M24.24

    Disorder of ligament, hand

  • M24.241

    Disorder of ligament, right hand

  • M24.242

    Disorder of ligament, left hand

  • M24.249

    Disorder of ligament, unspecified hand

  • M24.25

    Disorder of ligament, hip

  • M24.251

    Disorder of ligament, right hip

  • M24.252

    Disorder of ligament, left hip

  • M24.259

    Disorder of ligament, unspecified hip

  • M24.27

    Disorder of ligament, ankle and foot

  • M24.271

    Disorder of ligament, right ankle

  • M24.272

    Disorder of ligament, left ankle

  • M24.273

    Disorder of ligament, unspecified ankle

  • M24.274

    Disorder of ligament, right foot

  • M24.275

    Disorder of ligament, left foot

  • M24.276

    Disorder of ligament, unspecified foot

  • M24.28

    Disorder of ligament, vertebrae

  • M24.29

    Disorder of ligament, other specified site

  • M24.3

    Pathological dislocation of joint, not elsewhere classified

  • M24.30

    Pathological dislocation of unspecified joint, not elsewhere classified

  • M24.31

    Pathological dislocation of shoulder, not elsewhere classified

  • M24.311

    Pathological dislocation of right shoulder, not elsewhere classified

  • M24.312

    Pathological dislocation of left shoulder, not elsewhere classified

  • M24.319

    Pathological dislocation of unspecified shoulder, not elsewhere classified

  • M24.32

    Pathological dislocation of elbow, not elsewhere classified

  • M24.321

    Pathological dislocation of right elbow, not elsewhere classified

  • M24.322

    Pathological dislocation of left elbow, not elsewhere classified

  • M24.329

    Pathological dislocation of unspecified elbow, not elsewhere classified

  • M24.33

    Pathological dislocation of wrist, not elsewhere classified

  • M24.331

    Pathological dislocation of right wrist, not elsewhere classified

  • M24.332

    Pathological dislocation of left wrist, not elsewhere classified

  • M24.339

    Pathological dislocation of unspecified wrist, not elsewhere classified

  • M24.34

    Pathological dislocation of hand, not elsewhere classified

  • M24.341

    Pathological dislocation of right hand, not elsewhere classified

  • M24.342

    Pathological dislocation of left hand, not elsewhere classified

  • M24.349

    Pathological dislocation of unspecified hand, not elsewhere classified

  • M24.35

    Pathological dislocation of hip, not elsewhere classified

  • M24.351

    Pathological dislocation of right hip, not elsewhere classified

  • M24.352

    Pathological dislocation of left hip, not elsewhere classified

  • M24.359

    Pathological dislocation of unspecified hip, not elsewhere classified

  • M24.36

    Pathological dislocation of knee, not elsewhere classified

  • M24.361

    Pathological dislocation of right knee, not elsewhere classified

  • M24.362

    Pathological dislocation of left knee, not elsewhere classified

  • M24.369

    Pathological dislocation of unspecified knee, not elsewhere classified

  • M24.37

    Pathological dislocation of ankle and foot, not elsewhere classified

  • M24.371

    Pathological dislocation of right ankle, not elsewhere classified

  • M24.372

    Pathological dislocation of left ankle, not elsewhere classified

  • M24.373

    Pathological dislocation of unspecified ankle, not elsewhere classified

  • M24.374

    Pathological dislocation of right foot, not elsewhere classified

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