Neurosurgery Coding Alert

Reader Questions:

Use This Advice on Sequestrectomy

Question: When the surgeon removes diseased bone and tissue from the brain, should I report one of the foreign body removal (FBR) codes?

Louisiana Subscriber

Answer: No, you should choose a different code for removal of diseased bone and tissue, also known as sequestrectomy. On the claim, you’d report 61501 (Craniectomy; for osteomyelitis) for the surgery. Since the bone and tissue removed were already there—i.e., they weren’t foreign bodies—then the surgeon didn’t perform an FBR.

Dx clues: You might be able to tell whether the surgery is a sequestrectomy based on the diagnosis codes present in the report. Here are some ICD-10 codes you might see on a 61501 claim:

  • M46.21 (Osteomyelitis of vertebra, occipito-atlanto-axial region)
  • M85.00 (Fibrous dysplasia (monostotic), unspecified site)
  • M85.2 (Hyperostosis of skull)
  • M85.40 (Solitary bone cyst, unspecified site)
  • M86.38 (Chronic multifocal osteomyelitis, other site)
  • M86.48 (Chronic osteomyelitis with draining sinus, other site)

Brain FBR explained: While you’ll report 61501 for the removal of diseased tissue or bone from the brain, you’ll report these codes for a brain FBR:

  • 61570 (Craniectomy or craniotomy with excision of foreign body from brain)
  • 61571 (… with treatment of penetrating wound of brain)

Dx clues: You might be able to tell whether the surgery is a brain FBR based on the diagnosis codes present on the report. Here are some ICD-10 codes you might see on a 61570/61571 claim:

  • Z18.09 (Other retained radioactive fragments)
  • Z18.10 (Retained metal fragments, unspecified)
  • Z18.11 (Retained magnetic metal fragments)
  • Z18.2 (Retained plastic fragments).