Replacing the flap made during this craniotomy

Read an original fictional chart, identify the supported facts, and explain your coding workflow.

Chart gym · Original fictional record

Service date: 2026-09-09 · Professional operative service; cited Medicare NCCI relationship

Use your code books and write your reasoning before opening the walkthrough. This exercise contains no real patient information.

Operative purpose

Fictional adult undergoes a right frontal craniotomy for a physician-documented intracranial lesion. The procedure report identifies the planned intracranial work and the access site. No preexisting skull defect requiring separate repair is documented.

Access and treatment

The surgeon creates a right frontal bone flap to perform the operation. The planned intracranial treatment is completed through that opening. The report does not describe a contralateral operation or a separately necessary access hole at an unrelated location.

Closure

The same bone flap created at the beginning of this operation is returned to its original position and secured. No defect larger than the current flap is repaired. The fixation hardware is documented as part of completing the craniotomy.

Review issue

A draft adds cranioplasty because the note says the bone flap was replaced. Apply the NCCI distinction between routine replacement of the current flap and other qualifying defect repairs. Exact selection of the intracranial operation still requires its full operative details and authorized entry.

Your coding worksheet

Identify when the skull defect was created.
Compare the repaired area with the current flap.
Evaluate the additional cranioplasty proposal.
State what different history would require another review.

In your notebook, record the supported facts, your index route, the instructions you checked, and any missing detail that limits your answer.

Compare with the worked explanation

The defect was created for the current craniotomy.
Only the current flap is replaced; no older or larger defect is supplied.
NCCI C.4 includes this flap replacement in the craniotomy.
A prior-encounter defect or a larger repaired defect would require its own complete factual and entry review, not an assumption based on fixation hardware.

Reference sections: C.4

Practice the linked chart questions