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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  • M84.758K—

    Complete oblique atypical femoral fracture, left leg, subsequent encounter for fracture with nonunion

  • M84.758P—

    Complete oblique atypical femoral fracture, left leg, subsequent encounter for fracture with malunion

  • M84.758S—

    Complete oblique atypical femoral fracture, left leg, sequela

  • M84.759—

    Complete oblique atypical femoral fracture, unspecified leg

  • M84.759A—

    Complete oblique atypical femoral fracture, unspecified leg, initial encounter for fracture

  • M84.759D—

    Complete oblique atypical femoral fracture, unspecified leg, subsequent encounter for fracture with routine healing

  • M84.759G—

    Complete oblique atypical femoral fracture, unspecified leg, subsequent encounter for fracture with delayed healing

  • M84.759K—

    Complete oblique atypical femoral fracture, unspecified leg, subsequent encounter for fracture with nonunion

  • M84.759P—

    Complete oblique atypical femoral fracture, unspecified leg, subsequent encounter for fracture with malunion

  • M84.759S—

    Complete oblique atypical femoral fracture, unspecified leg, sequela

  • M84.80—

    Other disorders of continuity of bone, unspecified site

  • M84.811—

    Other disorders of continuity of bone, right shoulder

  • M84.812—

    Other disorders of continuity of bone, left shoulder

  • M84.819—

    Other disorders of continuity of bone, unspecified shoulder

  • M84.821—

    Other disorders of continuity of bone, right humerus

  • M84.822—

    Other disorders of continuity of bone, left humerus

  • M84.829—

    Other disorders of continuity of bone, unspecified humerus

  • M84.831—

    Other disorders of continuity of bone, right ulna

  • M84.832—

    Other disorders of continuity of bone, left ulna

  • M84.833—

    Other disorders of continuity of bone, right radius

  • M84.834—

    Other disorders of continuity of bone, left radius

  • M84.839—

    Other disorders of continuity of bone, unspecified ulna and radius

  • M84.841—

    Other disorders of continuity of bone, right hand

  • M84.842—

    Other disorders of continuity of bone, left hand

  • M84.849—

    Other disorders of continuity of bone, unspecified hand

  • M84.851—

    Other disorders of continuity of bone, right pelvic region and thigh

  • M84.852—

    Other disorders of continuity of bone, left pelvic region and thigh

  • M84.859—

    Other disorders of continuity of bone, unspecified pelvic region and thigh

  • M84.861—

    Other disorders of continuity of bone, right tibia

  • M84.862—

    Other disorders of continuity of bone, left tibia

  • M84.863—

    Other disorders of continuity of bone, right fibula

  • M84.864—

    Other disorders of continuity of bone, left fibula

  • M84.869—

    Other disorders of continuity of bone, unspecified tibia and fibula

  • M84.871—

    Other disorders of continuity of bone, right ankle and foot

  • M84.872—

    Other disorders of continuity of bone, left ankle and foot

  • M84.879—

    Other disorders of continuity of bone, unspecified ankle and foot

  • M84.88—

    Other disorders of continuity of bone, other site

  • M84.9—

    Disorder of continuity of bone, unspecified

  • M85.00—

    Fibrous dysplasia (monostotic), unspecified site

  • M85.011—

    Fibrous dysplasia (monostotic), right shoulder

  • M85.012—

    Fibrous dysplasia (monostotic), left shoulder

  • M85.019—

    Fibrous dysplasia (monostotic), unspecified shoulder

  • M85.021—

    Fibrous dysplasia (monostotic), right upper arm

  • M85.022—

    Fibrous dysplasia (monostotic), left upper arm

  • M85.029—

    Fibrous dysplasia (monostotic), unspecified upper arm

  • M85.031—

    Fibrous dysplasia (monostotic), right forearm

  • M85.032—

    Fibrous dysplasia (monostotic), left forearm

  • M85.039—

    Fibrous dysplasia (monostotic), unspecified forearm

  • M85.041—

    Fibrous dysplasia (monostotic), right hand

  • M85.042—

    Fibrous dysplasia (monostotic), left hand

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