AAPC Certified Professional Coder (CPC) — All Questions

The same surgeon performs several distinct surgical procedures through separate incisions during one operative session. Which modifier identifies the second and subsequent procedures so the payer can apply the multiple-procedure fee reduction?

• a.Modifier -51 (Multiple procedures)✓
• b.Modifier -50 (Bilateral procedure)
• c.Modifier -59 (Distinct procedural service)
• d.Modifier -22 (Increased procedural services)

Modifier -51 tells the payer that more than one procedure was performed in the same session by the same provider, so payment ranking (100% for the highest-valued, reduced for the rest) can be applied. -50 is only for mirror-image bilateral procedures, -59 unbundles services that are normally packaged together, and -22 signals substantially greater work than usual. Do not confuse the multiple-procedure concept (-51) with unbundling (-59).

When selecting a CPT code for excision of a benign skin lesion, how is the size determined?

• a.The greatest clinical diameter of the lesion plus the narrowest margin required, measured before excision✓
• b.The diameter of the specimen as measured by pathology after fixation
• c.The diameter of the lesion alone, ignoring surgical margins
• d.The total surface area of skin removed, including the repair

Excised diameter equals the lesion's greatest clinical diameter plus the most narrow margins needed on each side, and it must be measured before removal because formalin fixation shrinks tissue. Coding from the pathology report understates the true size. Margins are part of excision sizing, and the closure (repair) is coded separately when it rises to intermediate/complex.

A CPT surgical code carries the parenthetical designation '(separate procedure).' What does this tell the coder?

• a.The procedure is always billed separately in addition to any other service
• b.It is bundled when performed as an integral part of a larger procedure, but may be reported when it is the only service or is unrelated/distinct✓
• c.It always requires modifier -50
• d.It is never reimbursable under any circumstance

'Separate procedure' means the service is considered an inherent component of a more comprehensive procedure and is not billed when performed at the same site/session as that larger procedure. It becomes reportable only when performed alone or on a different site/session — often supported by modifier -59 or an appropriate X{EPSU} modifier.

For a major surgery with a 90-day global period, which of the following is INCLUDED in the global surgical package and NOT separately reportable?

• a.The operation, the related preoperative E/M on the day before or day of surgery, and routine postoperative care during the 90 days✓
• b.Treatment of an unrelated new illness during the postoperative period
• c.A staged or planned return to the operating room decided in advance
• d.Diagnostic tests and studies needed to establish the surgical diagnosis

The global package bundles the procedure itself, the related pre-op visit the day before/of surgery, intraoperative work, and normal follow-up care through the global window. Unrelated care (modifier -24/-79), staged procedures (-58), and the diagnostic work-up that led to the decision for surgery fall outside the package and are separately payable.