M90.56 Osteonecrosis in diseases classified elsewhere, lower leg

Non-billable header with 3 child codes.

Applies from M90 Osteopathies in diseases classified elsewhere

Excludes1 (never code together)

• 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)

Applies from M90.5 Osteonecrosis in diseases classified elsewhere

Code first

• underlying disease, such as:
• caisson disease (T70.3)
• hemoglobinopathy (D50-D64)

Codes under M90.56

• M90.561 Osteonecrosis in diseases classified elsewhere, right lower leg
• M90.562 Osteonecrosis in diseases classified elsewhere, left lower leg
• M90.569 Osteonecrosis in diseases classified elsewhere, unspecified lower leg

Code annotations containing back-references to M90.56

Back-references to M90

• Type 1 Excludes: M87 Osteonecrosis ("osteochondropathies (M90-M93)")

Diagnosis Index entries for M90.56

• Osteonecrosis › secondary NEC › due to › hemoglobinopathy NEC › fibula
• Osteonecrosis › secondary NEC › due to › hemoglobinopathy NEC › tibia
• Osteonecrosis › secondary NEC › in › caisson disease › fibula
• Osteonecrosis › secondary NEC › in › caisson disease › tibia

Nearby codes

• M90.549 Osteonecrosis in diseases classified elsewhere, unspecified hand
• M90.55 Osteonecrosis in diseases classified elsewhere, thigh
• M90.551 Osteonecrosis in diseases classified elsewhere, right thigh
• M90.552 Osteonecrosis in diseases classified elsewhere, left thigh
• M90.559 Osteonecrosis in diseases classified elsewhere, unspecified thigh
• M90.56 Osteonecrosis in diseases classified elsewhere, lower leg (this code)
• M90.561 Osteonecrosis in diseases classified elsewhere, right lower leg
• M90.562 Osteonecrosis in diseases classified elsewhere, left lower leg
• M90.569 Osteonecrosis in diseases classified elsewhere, unspecified lower leg
• M90.57 Osteonecrosis in diseases classified elsewhere, ankle and foot
• M90.571 Osteonecrosis in diseases classified elsewhere, right ankle and foot