M00-M99 - Diseases of the musculoskeletal system and connective tissue

ICD-10-CM Chapter 13 · 24 sections · 79 categories · 8,707 codes · FY2027

Covers diseases of the musculoskeletal system and connective tissue including arthropathies, dorsopathies, and osteoporosis.

Chapter Notes

Excludes 2 — Not Included HereFrom Chapter M00-M99

Not part of this code; report both codes when the patient has both conditions.

  • 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)
NotesFrom Chapter M00-M99

Instructional notes from the ICD-10-CM tabular list.

  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Categories in this Chapter (79)

M00-M02Infectious arthropathies (M00-M02)(3)

M04Autoinflammatory syndromes (M04)(1)

M05-M14Inflammatory polyarthropathies (M05-M14)(10)

M15-M19Osteoarthritis (M15-M19)(5)

M20-M25Other joint disorders (M20-M25)(6)

M26-M27Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)(2)

M30-M36Systemic connective tissue disorders (M30-M36)(7)

M40-M43Deforming dorsopathies (M40-M43)(4)

M45-M49Spondylopathies (M45-M49)(5)

M50-M54Other dorsopathies (M50-M54)(4)

M60-M63Disorders of muscles (M60-M63)(4)

M65-M67Disorders of synovium and tendon (M65-M67)(3)

M70-M79Other soft tissue disorders (M70-M79)(7)

M80-M85Disorders of bone density and structure (M80-M85)(5)

M86-M90Other osteopathies (M86-M90)(5)

M91-M94Chondropathies (M91-M94)(4)

M95Other disorders of the musculoskeletal system and connective tissue (M95)(1)

M96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified (M96)(1)

M97Periprosthetic fracture around internal prosthetic joint (M97)(1)

M99Biomechanical lesions, not elsewhere classified (M99)(1)