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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  • M84.459A—

    Pathological fracture, hip, unspecified, initial encounter for fracture

  • M84.459D—

    Pathological fracture, hip, unspecified, subsequent encounter for fracture with routine healing

  • M84.459G—

    Pathological fracture, hip, unspecified, subsequent encounter for fracture with delayed healing

  • M84.459K—

    Pathological fracture, hip, unspecified, subsequent encounter for fracture with nonunion

  • M84.459P—

    Pathological fracture, hip, unspecified, subsequent encounter for fracture with malunion

  • M84.459S—

    Pathological fracture, hip, unspecified, sequela

  • M84.46—

    Pathological fracture, tibia and fibula

  • M84.461—

    Pathological fracture, right tibia

  • M84.461A—

    Pathological fracture, right tibia, initial encounter for fracture

  • M84.461D—

    Pathological fracture, right tibia, subsequent encounter for fracture with routine healing

  • M84.461G—

    Pathological fracture, right tibia, subsequent encounter for fracture with delayed healing

  • M84.461K—

    Pathological fracture, right tibia, subsequent encounter for fracture with nonunion

  • M84.461P—

    Pathological fracture, right tibia, subsequent encounter for fracture with malunion

  • M84.461S—

    Pathological fracture, right tibia, sequela

  • M84.462—

    Pathological fracture, left tibia

  • M84.462A—

    Pathological fracture, left tibia, initial encounter for fracture

  • M84.462D—

    Pathological fracture, left tibia, subsequent encounter for fracture with routine healing

  • M84.462G—

    Pathological fracture, left tibia, subsequent encounter for fracture with delayed healing

  • M84.462K—

    Pathological fracture, left tibia, subsequent encounter for fracture with nonunion

  • M84.462P—

    Pathological fracture, left tibia, subsequent encounter for fracture with malunion

  • M84.462S—

    Pathological fracture, left tibia, sequela

  • M84.463—

    Pathological fracture, right fibula

  • M84.463A—

    Pathological fracture, right fibula, initial encounter for fracture

  • M84.463D—

    Pathological fracture, right fibula, subsequent encounter for fracture with routine healing

  • M84.463G—

    Pathological fracture, right fibula, subsequent encounter for fracture with delayed healing

  • M84.463K—

    Pathological fracture, right fibula, subsequent encounter for fracture with nonunion

  • M84.463P—

    Pathological fracture, right fibula, subsequent encounter for fracture with malunion

  • M84.463S—

    Pathological fracture, right fibula, sequela

  • M84.464—

    Pathological fracture, left fibula

  • M84.464A—

    Pathological fracture, left fibula, initial encounter for fracture

  • M84.464D—

    Pathological fracture, left fibula, subsequent encounter for fracture with routine healing

  • M84.464G—

    Pathological fracture, left fibula, subsequent encounter for fracture with delayed healing

  • M84.464K—

    Pathological fracture, left fibula, subsequent encounter for fracture with nonunion

  • M84.464P—

    Pathological fracture, left fibula, subsequent encounter for fracture with malunion

  • M84.464S—

    Pathological fracture, left fibula, sequela

  • M84.469—

    Pathological fracture, unspecified tibia and fibula

  • M84.469A—

    Pathological fracture, unspecified tibia and fibula, initial encounter for fracture

  • M84.469D—

    Pathological fracture, unspecified tibia and fibula, subsequent encounter for fracture with routine healing

  • M84.469G—

    Pathological fracture, unspecified tibia and fibula, subsequent encounter for fracture with delayed healing

  • M84.469K—

    Pathological fracture, unspecified tibia and fibula, subsequent encounter for fracture with nonunion

  • M84.469P—

    Pathological fracture, unspecified tibia and fibula, subsequent encounter for fracture with malunion

  • M84.469S—

    Pathological fracture, unspecified tibia and fibula, sequela

  • M84.47—

    Pathological fracture, ankle, foot and toes

  • M84.471—

    Pathological fracture, right ankle

  • M84.471A—

    Pathological fracture, right ankle, initial encounter for fracture

  • M84.471D—

    Pathological fracture, right ankle, subsequent encounter for fracture with routine healing

  • M84.471G—

    Pathological fracture, right ankle, subsequent encounter for fracture with delayed healing

  • M84.471K—

    Pathological fracture, right ankle, subsequent encounter for fracture with nonunion

  • M84.471P—

    Pathological fracture, right ankle, subsequent encounter for fracture with malunion

  • M84.471S—

    Pathological fracture, right ankle, sequela

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