If the Pt presents for a PCR test and you are ONLY performing the swab in the office/UC/ER but sending the swab to a lab you would code a level 1 or 2 EM and append -CS mod. That is only if the Physician performs the key components of an EM. If only the swab was performed by an NPP then you can't bill for the EM at all.
The only instance
CPT 87635 can be billed outside of a clinical lab is if the PCR swab is performed and results processed in office via the
ID NOW Molecular SARS Cov2 RNA device owned by your office, in a non-clinical lab POS. This is because the code descriptor for 87635 specifically states, "amplified probe technique" which can only be performed by a clinical lab or the ID NOW device. Your practice's CLIA certification would need to be updated to authorize billing 87635 due to owning an ID NOW device. If your CLIA certification is not updated then it will deny.
CPT 87426 is the correct code for a
POCT Rapid SARS-CoV-2 swab collected and performed on site/in office.
Infectious agent antigen detection by immunoassay technique, (eg, enzyme immunoassay [EIA], enzyme-linked immunosorbent assay [ELISA], fluorescence immunoassay [FIA], immunochemiluminometric assay [IMCA]) qualitative or semiquantitative; severe acute respiratory syndrome coronavirus (eg, SARS-CoV, SARS-CoV-2 [COVID-19])
CPT 87428 is the correct code for when
POCT Rapid SARS-CoV-2 AND POCT Rapid Influenza A/B are BOTH performed
Infectious agent antigen detection by immunoassay technique, (eg, enzyme immunoassay [EIA], enzyme-linked immunosorbent assay [ELISA], fluorescence immunoassay [FIA], immunochemiluminometric assay [IMCA]) qualitative or semiquantitative; severe acute respiratory syndrome coronavirus (eg, SARS-CoV, SARS-CoV-2 [COVID-
19]) and influenza virus types A and B
Hope this helps clarify!