CPC Exam Dumps : Certified Professional Coder (CPC) Exam

Procedure Coding (CPT®):

69910 – Labyrinthectomy, complete; transmastoid approach

Provider performed:

Mastoidectomy

Complete destruction/removal of semicircular canals, utricle, and saccule

This is a complete labyrinthectomy, not partial

69990 – Microsurgical techniques, requiring use of operating microscope

Separately reportable with otologic procedures

Modifier -51 not required (add-on code)

Diagnosis Coding (ICD-10-CM):

H81.391 – Peripheral vertigo, right ear

Correct laterality and condition

Why Other Options Are Incorrect:

69905 – Partial labyrinthectomy

R42 – Symptom code (dizziness), not used when definitive diagnosis exists

In CPT, a code labeled“separate procedure”is typically a service that isnormally includedas part of a more comprehensive procedure andshould not be reported separatelywhen performed as an integral component. However, itmaybe reported when performedindependentlyorunrelatedto the primary procedure—this supports options A, B, and C as true. The false statement isDbecause CPT doesnotinstruct that modifier79is specifically required to report a separate procedure with an unrelated primary service. Modifier selection depends on the actual circumstances and payer rules, and “separate procedure” logic is about whether the service isdistinct and not integral, often supported by documentation of a different site/session or separate clinical intent; when a modifier is needed, it is commonly adistinct procedural servicemodifier (e.g., 59 or X{EPSU}) rather than automatically 79. Modifier79is a global surgery modifier used for anunrelated procedure during the postoperative period, which is a different concept than “separate procedure” designation.