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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  • M84.419G—

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

  • M84.419K—

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

  • M84.419P—

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

  • M84.419S—

    Pathological fracture, unspecified shoulder, sequela

  • M84.421—

    Pathological fracture, right humerus

  • M84.421A—

    Pathological fracture, right humerus, initial encounter for fracture

  • M84.421D—

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

  • M84.421G—

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

  • M84.421K—

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

  • M84.421P—

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

  • M84.421S—

    Pathological fracture, right humerus, sequela

  • M84.422—

    Pathological fracture, left humerus

  • M84.422A—

    Pathological fracture, left humerus, initial encounter for fracture

  • M84.422D—

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

  • M84.422G—

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

  • M84.422K—

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

  • M84.422P—

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

  • M84.422S—

    Pathological fracture, left humerus, sequela

  • M84.429—

    Pathological fracture, unspecified humerus

  • M84.429A—

    Pathological fracture, unspecified humerus, initial encounter for fracture

  • M84.429D—

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

  • M84.429G—

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

  • M84.429K—

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

  • M84.429P—

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

  • M84.429S—

    Pathological fracture, unspecified humerus, sequela

  • M84.431—

    Pathological fracture, right ulna

  • M84.431A—

    Pathological fracture, right ulna, initial encounter for fracture

  • M84.431D—

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

  • M84.431G—

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

  • M84.431K—

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

  • M84.431P—

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

  • M84.431S—

    Pathological fracture, right ulna, sequela

  • M84.432—

    Pathological fracture, left ulna

  • M84.432A—

    Pathological fracture, left ulna, initial encounter for fracture

  • M84.432D—

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

  • M84.432G—

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

  • M84.432K—

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

  • M84.432P—

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

  • M84.432S—

    Pathological fracture, left ulna, sequela

  • M84.433—

    Pathological fracture, right radius

  • M84.433A—

    Pathological fracture, right radius, initial encounter for fracture

  • M84.433D—

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

  • M84.433G—

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

  • M84.433K—

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

  • M84.433P—

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

  • M84.433S—

    Pathological fracture, right radius, sequela

  • M84.434—

    Pathological fracture, left radius

  • M84.434A—

    Pathological fracture, left radius, initial encounter for fracture

  • M84.434D—

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

  • M84.434G—

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

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