Osteonecrosis due to drugs, ankle, foot and toes

avascular necrosis of bone

• juvenile osteonecrosis (M91-M92)
• osteochondropathies (M90-M93)

code to identify major osseous defect, if applicable (M89.7-)

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

• 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)

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

postprocedural osteopathies (M96.-)