CPC - CPT Surgery and Modifiers (36% of the exam) - Section 1.2

Assign CPT surgery codes from the respiratory and cardiovascular (30000), digestive (40000), and urinary, reproductive, and endocrine (50000) sections for a documented operative scenario.

Select codes for respiratory, cardiovascular, hemic and lymphatic procedures (30000 series), digestive system procedures from the mouth through the intestines and accessory organs (40000 series), and urinary, male and female reproductive, and endocrine procedures (50000 series). Distinguish diagnostic from therapeutic endoscopy, apply the bundling rules that surface in these sections, and read the operative note for the approach and extent that drive code choice.

Respiratory and cardiovascular 30000Digestive 40000 seriesUrinary and reproductive 50000Endoscopy coding

Practice question for this objective

Free sampleCPT Surgery and Modifiersmedium

Operative note: a 52-year-old man with an L4 to L5 disc herniation undergoes an open posterior approach. The surgeon performs a unilateral laminotomy (hemilaminectomy) with decompression of the nerve root and excision of the herniated disc at a single lumbar interspace. No facetectomy at additional segments and no prior surgery at this level are documented. Which code best reports this procedure?

63020 laminotomy/decompression, single cervical interspace
63030 laminotomy/decompression + discectomy, single lumbar interspace
63042 laminotomy re-exploration, single lumbar interspace
63047 laminectomy + facetectomy/foraminotomy, single lumbar segment

ACPT 63020, laminotomy with decompression, single cervical interspace
BCPT 63047, laminectomy with facetectomy and foraminotomy, single lumbar segment
CCPT 63042, laminotomy re-exploration, single lumbar interspace
DCPT 63030, laminotomy with decompression and discectomy, single lumbar interspace Correct

Select a spinal decompression code by matching the documented approach, procedure, and spinal region to the code descriptor. Spinal decompression codes are stratified by region (cervical, thoracic, lumbar), by technique (laminotomy versus laminectomy with facetectomy), and by whether it is an initial or a re-exploration procedure, so the note must satisfy all three axes before a code is keyed.

Why A is wrong: This is the correct family of decompression code but the wrong spinal region; the note describes a lumbar interspace, not a cervical one.

Why B is wrong: It is tempting because it is a lumbar decompression, but the note documents a laminotomy with discectomy, not a laminectomy with facetectomy and foraminotomy.

Why C is wrong: Re-exploration codes require documented prior surgery at the same interspace, which the note explicitly rules out, so this overstates the service.

Why D is correct: This matches the documentation exactly: a unilateral lumbar laminotomy with nerve root decompression and excision of a herniated disc at one interspace.

See more CPC practice questions, answers explained.

Exam traps in CPT Surgery and Modifiers

Answers that look right on this material and are not. Each one is a distractor from a different question in the CPC bank for this domain.

50230, radical nephrectomy with regional lymphadenectomy performed through an open flank incision
Why it is wrong: Matches the radical extent and node dissection but codes an open approach, whereas the note documents a laparoscopic operation.
60240, thyroidectomy, total or complete, without neck dissection
Why it is wrong: Removes the whole gland but includes no lymph node dissection, so it fails to capture the limited nodal work documented for the cancer.
52204, cystourethroscopy with biopsy of the bladder lesion
Why it is wrong: A biopsy-only code that merely samples tissue; the surgeon fully resected and fulgurated the tumour, so a treatment code is required instead.

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