Pathology/Lab Coding Alert

Question: Our lab is performing a multiplex amplified probe technique for multiple influenza virus sub-types. Is new code 87502 the appropriate code even though the definition doesn't indicate multiplex, or should we use a non-specific multiplex code?

California Subscriber

Answer: Leaving "multiplex" out of the 87502 code definition was an error, as indicated in the AMA's "Corrections in CPT® 2011" document. The most recent update, as of printing time, was May 26, 2011.

Here's the corrected code, with the change underlined: 87502 (Infectious agent detection by nucleic acid [DNA or RNA]; influenza virus, for multiple types or sub-types, multiplex reverse transcription and amplified probe technique, first 2 types of sub-types).

You should report 87502 for the first two influenza types or subtypes your lab identifies using a multiplex reaction (involving more than one nucleic acid sequence in a single tube) and amplified probe methodology.

For any additional influenza types or subtypes identified beyond the first two, you should additionally report the appropriate number of units of +87503 (... influenza virus, for multiple types or sub-types, multiplex reverse transcription and amplified probe technique, each additional influenza virus type or sub-type beyond 2 [List separately in addition to code for primary procedure]).

Check the Corrections document regularly for updates at the AMA Web site, at www.ama-assn.org/ama/pub/physicianresources/solutions-managing-your-practice/coding-billinginsurance/cpt/about-cpt/errata.page. Other current corrections involve a note following 82013 (Acetylcholinesterase) directing coders to use 82930 (Gastric acid analysis, includes pH if performed, each specimen) for gastric acid analysis.