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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  • M81.6—

    Localized osteoporosis [Lequesne]

  • M81.8—

    Other osteoporosis without current pathological fracture

  • M83.0—

    Puerperal osteomalacia

  • M83.1—

    Senile osteomalacia

  • M83.2—

    Adult osteomalacia due to malabsorption

  • M83.3—

    Adult osteomalacia due to malnutrition

  • M83.4—

    Aluminum bone disease

  • M83.5—

    Other drug-induced osteomalacia in adults

  • M83.8—

    Other adult osteomalacia

  • M83.9—

    Adult osteomalacia, unspecified

  • M84.30—

    Stress fracture, unspecified site

  • M84.30XA—

    Stress fracture, unspecified site, initial encounter for fracture

  • M84.30XD—

    Stress fracture, unspecified site, subsequent encounter for fracture with routine healing

  • M84.30XG—

    Stress fracture, unspecified site, subsequent encounter for fracture with delayed healing

  • M84.30XK—

    Stress fracture, unspecified site, subsequent encounter for fracture with nonunion

  • M84.30XP—

    Stress fracture, unspecified site, subsequent encounter for fracture with malunion

  • M84.30XS—

    Stress fracture, unspecified site, sequela

  • M84.311—

    Stress fracture, right shoulder

  • M84.311A—

    Stress fracture, right shoulder, initial encounter for fracture

  • M84.311D—

    Stress fracture, right shoulder, subsequent encounter for fracture with routine healing

  • M84.311G—

    Stress fracture, right shoulder, subsequent encounter for fracture with delayed healing

  • M84.311K—

    Stress fracture, right shoulder, subsequent encounter for fracture with nonunion

  • M84.311P—

    Stress fracture, right shoulder, subsequent encounter for fracture with malunion

  • M84.311S—

    Stress fracture, right shoulder, sequela

  • M84.312—

    Stress fracture, left shoulder

  • M84.312A—

    Stress fracture, left shoulder, initial encounter for fracture

  • M84.312D—

    Stress fracture, left shoulder, subsequent encounter for fracture with routine healing

  • M84.312G—

    Stress fracture, left shoulder, subsequent encounter for fracture with delayed healing

  • M84.312K—

    Stress fracture, left shoulder, subsequent encounter for fracture with nonunion

  • M84.312P—

    Stress fracture, left shoulder, subsequent encounter for fracture with malunion

  • M84.312S—

    Stress fracture, left shoulder, sequela

  • M84.319—

    Stress fracture, unspecified shoulder

  • M84.319A—

    Stress fracture, unspecified shoulder, initial encounter for fracture

  • M84.319D—

    Stress fracture, unspecified shoulder, subsequent encounter for fracture with routine healing

  • M84.319G—

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

  • M84.319K—

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

  • M84.319P—

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

  • M84.319S—

    Stress fracture, unspecified shoulder, sequela

  • M84.321—

    Stress fracture, right humerus

  • M84.321A—

    Stress fracture, right humerus, initial encounter for fracture

  • M84.321D—

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

  • M84.321G—

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

  • M84.321K—

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

  • M84.321P—

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

  • M84.321S—

    Stress fracture, right humerus, sequela

  • M84.322—

    Stress fracture, left humerus

  • M84.322A—

    Stress fracture, left humerus, initial encounter for fracture

  • M84.322D—

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

  • M84.322G—

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

  • M84.322K—

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

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