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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  • M79.661—

    Pain in right lower leg

  • M79.662—

    Pain in left lower leg

  • M79.669—

    Pain in unspecified lower leg

  • M79.671—

    Pain in right foot

  • M79.672—

    Pain in left foot

  • M79.673—

    Pain in unspecified foot

  • M79.674—

    Pain in right toe(s)

  • M79.675—

    Pain in left toe(s)

  • M79.676—

    Pain in unspecified toe(s)

  • M79.7—

    Fibromyalgia

  • M79.81—

    Nontraumatic hematoma of soft tissue

  • M79.89—

    Other specified soft tissue disorders

  • M79.9—

    Soft tissue disorder, unspecified

  • M79.A11—

    Nontraumatic compartment syndrome of right upper extremity

  • M79.A12—

    Nontraumatic compartment syndrome of left upper extremity

  • M79.A19—

    Nontraumatic compartment syndrome of unspecified upper extremity

  • M79.A21—

    Nontraumatic compartment syndrome of right lower extremity

  • M79.A22—

    Nontraumatic compartment syndrome of left lower extremity

  • M79.A29—

    Nontraumatic compartment syndrome of unspecified lower extremity

  • M79.A3—

    Nontraumatic compartment syndrome of abdomen

  • M79.A9—

    Nontraumatic compartment syndrome of other sites

  • M80.00—

    Age-related osteoporosis with current pathological fracture, unspecified site

  • M80.00XA—

    Age-related osteoporosis with current pathological fracture, unspecified site, initial encounter for fracture

  • M80.00XD—

    Age-related osteoporosis with current pathological fracture, unspecified site, subsequent encounter for fracture with routine healing

  • M80.00XG—

    Age-related osteoporosis with current pathological fracture, unspecified site, subsequent encounter for fracture with delayed healing

  • M80.00XK—

    Age-related osteoporosis with current pathological fracture, unspecified site, subsequent encounter for fracture with nonunion

  • M80.00XP—

    Age-related osteoporosis with current pathological fracture, unspecified site, subsequent encounter for fracture with malunion

  • M80.00XS—

    Age-related osteoporosis with current pathological fracture, unspecified site, sequela

  • M80.011—

    Age-related osteoporosis with current pathological fracture, right shoulder

  • M80.011A—

    Age-related osteoporosis with current pathological fracture, right shoulder, initial encounter for fracture

  • M80.011D—

    Age-related osteoporosis with current pathological fracture, right shoulder, subsequent encounter for fracture with routine healing

  • M80.011G—

    Age-related osteoporosis with current pathological fracture, right shoulder, subsequent encounter for fracture with delayed healing

  • M80.011K—

    Age-related osteoporosis with current pathological fracture, right shoulder, subsequent encounter for fracture with nonunion

  • M80.011P—

    Age-related osteoporosis with current pathological fracture, right shoulder, subsequent encounter for fracture with malunion

  • M80.011S—

    Age-related osteoporosis with current pathological fracture, right shoulder, sequela

  • M80.012—

    Age-related osteoporosis with current pathological fracture, left shoulder

  • M80.012A—

    Age-related osteoporosis with current pathological fracture, left shoulder, initial encounter for fracture

  • M80.012D—

    Age-related osteoporosis with current pathological fracture, left shoulder, subsequent encounter for fracture with routine healing

  • M80.012G—

    Age-related osteoporosis with current pathological fracture, left shoulder, subsequent encounter for fracture with delayed healing

  • M80.012K—

    Age-related osteoporosis with current pathological fracture, left shoulder, subsequent encounter for fracture with nonunion

  • M80.012P—

    Age-related osteoporosis with current pathological fracture, left shoulder, subsequent encounter for fracture with malunion

  • M80.012S—

    Age-related osteoporosis with current pathological fracture, left shoulder, sequela

  • M80.019—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder

  • M80.019A—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder, initial encounter for fracture

  • M80.019D—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder, subsequent encounter for fracture with routine healing

  • M80.019G—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder, subsequent encounter for fracture with delayed healing

  • M80.019K—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder, subsequent encounter for fracture with nonunion

  • M80.019P—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder, subsequent encounter for fracture with malunion

  • M80.019S—

    Age-related osteoporosis with current pathological fracture, unspecified shoulder, sequela

  • M80.021—

    Age-related osteoporosis with current pathological fracture, right humerus

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