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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  • M86.379—

    Chronic multifocal osteomyelitis, unspecified ankle and foot

  • M86.38—

    Chronic multifocal osteomyelitis, other site

  • M86.39—

    Chronic multifocal osteomyelitis, multiple sites

  • M86.40—

    Chronic osteomyelitis with draining sinus, unspecified site

  • M86.411—

    Chronic osteomyelitis with draining sinus, right shoulder

  • M86.412—

    Chronic osteomyelitis with draining sinus, left shoulder

  • M86.419—

    Chronic osteomyelitis with draining sinus, unspecified shoulder

  • M86.421—

    Chronic osteomyelitis with draining sinus, right humerus

  • M86.422—

    Chronic osteomyelitis with draining sinus, left humerus

  • M86.429—

    Chronic osteomyelitis with draining sinus, unspecified humerus

  • M86.431—

    Chronic osteomyelitis with draining sinus, right radius and ulna

  • M86.432—

    Chronic osteomyelitis with draining sinus, left radius and ulna

  • M86.439—

    Chronic osteomyelitis with draining sinus, unspecified radius and ulna

  • M86.441—

    Chronic osteomyelitis with draining sinus, right hand

  • M86.442—

    Chronic osteomyelitis with draining sinus, left hand

  • M86.449—

    Chronic osteomyelitis with draining sinus, unspecified hand

  • M86.451—

    Chronic osteomyelitis with draining sinus, right femur

  • M86.452—

    Chronic osteomyelitis with draining sinus, left femur

  • M86.459—

    Chronic osteomyelitis with draining sinus, unspecified femur

  • M86.461—

    Chronic osteomyelitis with draining sinus, right tibia and fibula

  • M86.462—

    Chronic osteomyelitis with draining sinus, left tibia and fibula

  • M86.469—

    Chronic osteomyelitis with draining sinus, unspecified tibia and fibula

  • M86.471—

    Chronic osteomyelitis with draining sinus, right ankle and foot

  • M86.472—

    Chronic osteomyelitis with draining sinus, left ankle and foot

  • M86.479—

    Chronic osteomyelitis with draining sinus, unspecified ankle and foot

  • M86.48—

    Chronic osteomyelitis with draining sinus, other site

  • M86.49—

    Chronic osteomyelitis with draining sinus, multiple sites

  • M86.50—

    Other chronic hematogenous osteomyelitis, unspecified site

  • M86.511—

    Other chronic hematogenous osteomyelitis, right shoulder

  • M86.512—

    Other chronic hematogenous osteomyelitis, left shoulder

  • M86.519—

    Other chronic hematogenous osteomyelitis, unspecified shoulder

  • M86.521—

    Other chronic hematogenous osteomyelitis, right humerus

  • M86.522—

    Other chronic hematogenous osteomyelitis, left humerus

  • M86.529—

    Other chronic hematogenous osteomyelitis, unspecified humerus

  • M86.531—

    Other chronic hematogenous osteomyelitis, right radius and ulna

  • M86.532—

    Other chronic hematogenous osteomyelitis, left radius and ulna

  • M86.539—

    Other chronic hematogenous osteomyelitis, unspecified radius and ulna

  • M86.541—

    Other chronic hematogenous osteomyelitis, right hand

  • M86.542—

    Other chronic hematogenous osteomyelitis, left hand

  • M86.549—

    Other chronic hematogenous osteomyelitis, unspecified hand

  • M86.551—

    Other chronic hematogenous osteomyelitis, right femur

  • M86.552—

    Other chronic hematogenous osteomyelitis, left femur

  • M86.559—

    Other chronic hematogenous osteomyelitis, unspecified femur

  • M86.561—

    Other chronic hematogenous osteomyelitis, right tibia and fibula

  • M86.562—

    Other chronic hematogenous osteomyelitis, left tibia and fibula

  • M86.569—

    Other chronic hematogenous osteomyelitis, unspecified tibia and fibula

  • M86.571—

    Other chronic hematogenous osteomyelitis, right ankle and foot

  • M86.572—

    Other chronic hematogenous osteomyelitis, left ankle and foot

  • M86.579—

    Other chronic hematogenous osteomyelitis, unspecified ankle and foot

  • M86.58—

    Other chronic hematogenous osteomyelitis, other site

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