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Exam CPC Topic 17 Question 196 Discussion

Actual exam question for AAPC's CPC exam
Question #: 196
Topic #: 17
A patient with coronary artery disease due to lipid-rich plaque undergoes coronary artery bypass grafting. The surgeon performs a left internal mammary artery graft to the left anterior descending artery. Then performs saphenous vein grafts to the obtuse marginal artery, ramus intermedius, and posterior descending artery. An endoscopic saphenous vein harvest is performed.
What CPT coding is reported for the surgical procedure?

Suggested Answer: D Vote an answer

Procedure Coding (CPT):
33533 - CABG, arterial graft; single arterial graft (LIMA to LAD)
Correct for left internal mammary artery # LAD
33519 - CABG, venous grafts; three coronary venous grafts
Saphenous vein grafts placed to:
Obtuse marginal
Ramus intermedius
Posterior descending artery
Total = 3 venous grafts
33508 - Endoscopic harvest of saphenous vein
Separately reportable only when endoscopic
Add-on code (no modifier required)
Why Other Options Are Incorrect:
A / C - Incorrect arterial graft code (33536 = multiple arterial grafts) B - Incorrect venous graft count (33512 = two grafts) CPT Guideline Reference:
CABG codes are selected based on:
Type of conduit (arterial vs venous)
Number of distal anastomoses
Endoscopic harvest is add-on and separately reportable

by Prescott at Jun 01, 2026, 04:13 PM

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