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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  • M67.20—

    Synovial hypertrophy, not elsewhere classified, unspecified site

  • M67.21—

    Synovial hypertrophy, not elsewhere classified, shoulder

  • M67.211—

    Synovial hypertrophy, not elsewhere classified, right shoulder

  • M67.212—

    Synovial hypertrophy, not elsewhere classified, left shoulder

  • M67.219—

    Synovial hypertrophy, not elsewhere classified, unspecified shoulder

  • M67.22—

    Synovial hypertrophy, not elsewhere classified, upper arm

  • M67.221—

    Synovial hypertrophy, not elsewhere classified, right upper arm

  • M67.222—

    Synovial hypertrophy, not elsewhere classified, left upper arm

  • M67.229—

    Synovial hypertrophy, not elsewhere classified, unspecified upper arm

  • M67.23—

    Synovial hypertrophy, not elsewhere classified, forearm

  • M67.231—

    Synovial hypertrophy, not elsewhere classified, right forearm

  • M67.232—

    Synovial hypertrophy, not elsewhere classified, left forearm

  • M67.239—

    Synovial hypertrophy, not elsewhere classified, unspecified forearm

  • M67.24—

    Synovial hypertrophy, not elsewhere classified, hand

  • M67.241—

    Synovial hypertrophy, not elsewhere classified, right hand

  • M67.242—

    Synovial hypertrophy, not elsewhere classified, left hand

  • M67.249—

    Synovial hypertrophy, not elsewhere classified, unspecified hand

  • M67.25—

    Synovial hypertrophy, not elsewhere classified, thigh

  • M67.251—

    Synovial hypertrophy, not elsewhere classified, right thigh

  • M67.252—

    Synovial hypertrophy, not elsewhere classified, left thigh

  • M67.259—

    Synovial hypertrophy, not elsewhere classified, unspecified thigh

  • M67.26—

    Synovial hypertrophy, not elsewhere classified, lower leg

  • M67.261—

    Synovial hypertrophy, not elsewhere classified, right lower leg

  • M67.262—

    Synovial hypertrophy, not elsewhere classified, left lower leg

  • M67.269—

    Synovial hypertrophy, not elsewhere classified, unspecified lower leg

  • M67.27—

    Synovial hypertrophy, not elsewhere classified, ankle and foot

  • M67.271—

    Synovial hypertrophy, not elsewhere classified, right ankle and foot

  • M67.272—

    Synovial hypertrophy, not elsewhere classified, left ankle and foot

  • M67.279—

    Synovial hypertrophy, not elsewhere classified, unspecified ankle and foot

  • M67.28—

    Synovial hypertrophy, not elsewhere classified, other site

  • M67.29—

    Synovial hypertrophy, not elsewhere classified, multiple sites

  • M67.3—

    Transient synovitis

  • M67.30—

    Transient synovitis, unspecified site

  • M67.31—

    Transient synovitis, shoulder

  • M67.311—

    Transient synovitis, right shoulder

  • M67.312—

    Transient synovitis, left shoulder

  • M67.319—

    Transient synovitis, unspecified shoulder

  • M67.32—

    Transient synovitis, elbow

  • M67.321—

    Transient synovitis, right elbow

  • M67.322—

    Transient synovitis, left elbow

  • M67.329—

    Transient synovitis, unspecified elbow

  • M67.33—

    Transient synovitis, wrist

  • M67.331—

    Transient synovitis, right wrist

  • M67.332—

    Transient synovitis, left wrist

  • M67.339—

    Transient synovitis, unspecified wrist

  • M67.34—

    Transient synovitis, hand

  • M67.341—

    Transient synovitis, right hand

  • M67.342—

    Transient synovitis, left hand

  • M67.349—

    Transient synovitis, unspecified hand

  • M67.35—

    Transient synovitis, hip

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