CPCA Coding for Laser Treatments 4

Question 1

A dermatologist uses a CO2 laser to resurface two anatomical areas: full face and bilateral hands. How should this be coded?

Accepted Answer

Report a separate code for each distinct anatomical area

Answer

Laser resurfacing CPT codes (15780–15783) are area-specific; each treated anatomical region is coded separately, with modifier 51 appended to the lower-valued procedure when payer rules require it.

Question 2

Which laser resurfacing CPT code is reported for treatment of the perioral region (lips and mouth area)?

Accepted Answer

15782

Answer

CPT 15782 reports laser skin resurfacing of the perioral area (around the mouth), which is one of the defined facial subunits with its own specific CPT code.

Question 3

During the global period of a laser procedure, a patient returns for a complication requiring additional laser treatment. Which modifier indicates the repeat procedure is for a different condition?

Accepted Answer

Modifier 79

Answer

Modifier 79 indicates an unrelated procedure or service by the same physician during the postoperative period, signaling that the return visit is not a complication of the original procedure.

Question 4

A laser treatment is performed for port-wine stain covering the cheek. What ICD-10-CM code supports medical necessity?

Accepted Answer

Q82.5

Answer

ICD-10-CM Q82.5 (Congenital non-neoplastic nevus) is the code that includes port-wine stain (nevus flammeus), a vascular birthmark treated with pulsed dye laser.

Question 5

Which documentation element is most critical when selecting between CPT 17106, 17107, and 17108 for laser vascular lesion destruction?

Accepted Answer

Total surface area in square centimeters

Answer

CPT codes 17106, 17107, and 17108 are differentiated solely by the total surface area treated (<10 sq cm, 10–50 sq cm, >50 sq cm), so precise area measurement in the operative note is essential.

CPCA Exam Practice Test

CPCA Exam Practice Test

CPCA Coding for Laser Treatments 4