M87.079 Idiopathic aseptic necrosis of unspecified toe(s)

Instructional Notes:

M87.079
Description: Idiopathic aseptic necrosis of unspecified toe(s)
↓
M87.07
Description: Idiopathic aseptic necrosis of ankle, foot and toes
Inclusion Term:
- Idiopathic aseptic necrosis of metatarsus, tarsus, and phalanges of toes
↓
M87.0
Description: Idiopathic aseptic necrosis of bone
↓
M87
Description: Osteonecrosis
Exclude1:
- juvenile osteonecrosis (M91-M92)
- osteochondropathies (M90-M93)
Use Additional Code:
- code to identify major osseous defect, if applicable (M89.7-)
Include:
- avascular necrosis of bone
↓
M86-M90
Description: Other osteopathies (M86-M90)
Exclude1:
- postprocedural osteopathies (M96.-)
↓
M00-M99
Description: Diseases of the musculoskeletal system and connective tissue
Exclude2:
- 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)
Notes:
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition