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

Note:
Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Excludes 2:
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)

Other osteopathies (M86-M90)

Excludes 1:
postprocedural osteopathies (M96.-)
M86 Osteomyelitis [+]
Use additional code (B95-B97) to identify infectious agent
Use additional code to identify major osseous defect, if applicable (M89.7-)
Excludes 1: osteomyelitis due to:
echinococcus (B67.2)
gonococcus (A54.43)
salmonella (A02.24)
Excludes 2: ostemyelitis of:
orbit (H05.0-)
petrous bone (H70.2-)
vertebra (M46.2-)
M87 Osteonecrosis [+]
Includes: avascular necrosis of bone
Use additional code to identify major osseous defect, if applicable (M89.7-)
Excludes 1: juvenile osteonecrosis (M91-M92)
osteochondropathies (M90-M93)
M88 Osteitis deformans [Paget's disease of bone] [+]
Excludes 1: osteitis deformans in neoplastic disease (M90.6)
M89 Other disorders of bone [+]
M90 Osteopathies in diseases classified elsewhere [+]
Excludes 1: osteochondritis, osteomyelitis, and osteopathy (in):
cryptococcosis (B45.3)
diabetes mellitus (E08-E13 with .69-)
gonococcal (A54.43)
neurogenic syphilis (A52.11)
renal osteodystrophy (N25.0)
salmonellosis (A02.24)
secondary syphilis (A51.46)
syphilis (late) (A52.77)

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