Is a combined flu and COVID test covered by insurance?
Often yes. When you have a fever and a cough, most plans treat the two in one swab as a diagnostic test and pay it. Code 87428 checks the same sample for COVID and for flu A and B. It usually costs more than either test alone, and the whole amount lands on your deductible if that is not met.
Often
Covered as one diagnostic test
One code, not two
The combined test replaces the separate COVID and flu lines. Billing 87428 plus 87426 or 87804 for the same swab usually gets one line denied.
Priciest swab
The combined panel usually prices above a flu or strep test, so a deductible patient feels it. Show the deductible left before the swab, not at checkout.
Two results
One line reports both answers, so do not add units for COVID and for flu the way a flu only test allows a second line.
Before the swab
Combined tests get run on instinct in respiratory season. A check at scheduling shows plan status, deductible left and copay so the desk can set expectations.
What would a real check show for this patient's 87428?
Pick a sample plan and type your fee. This is the visibility a real-time check gives the desk for every actual patient, in under a second.
Eligibility readout · 87428
Sample- Coverage
- Active, deductible met, plan pays 80 percent
- Frequency
- No limit when symptoms are charted
- Patient share
- Type your fee to see it
Estimate from a sample plan. A real check reads the actual plan in under a second.
When 87428 is the right code
- One swab tested for COVID and flu together
- Patient has respiratory symptoms, not a clearance request
- Antigen test run and read in your clinic
- No separate COVID or flu antigen line billed
Documentation payers expect
Chart the symptoms, the onset date and the single specimen collected. Payers look for one combined result in the record, so an order that reads like two separate tests invites a duplicate denial.
Why 87428 gets denied
What happens after the combined test
A positive line, either one, usually ends in a prescription the pharmacy bills on the drug side, sometimes after a prior authorization. A negative result in a patient who still feels awful often turns into a PCR at 87635 or a mono test at 86308, and the outside lab sends its own bill weeks later. Some plans then deny that follow up as duplicate testing. Knowing plan status and deductible before the swab is what keeps that conversation off the front desk.
87428, quick answers
Why is the combined test more expensive than a flu test?
It is one test looking for two different infections, and payers usually price it above a single antigen test. On a plan with a deductible, the higher amount is what applies.
Can the clinic bill a flu test and a COVID test instead?
Only if two separate tests were actually run. When one combined kit was used, most plans expect the single combined line and deny the extra one as a duplicate.
Does Medicare cover the combined COVID and flu test?
Part B covers provider ordered lab testing when you have symptoms, and clinical lab tests generally carry no coinsurance. The visit and any x-ray that day still follow normal Part B cost sharing.
Will my plan pay if I only had an exposure and feel fine?
Often not. Plans usually want symptoms documented, and testing after an exposure alone can be treated as screening and left to the patient.
What if the test is negative and I still feel sick?
The clinic may order more testing, and each added test is billed on its own line. Ask the front desk what your plan shows before those extra tests are run.
More questions? Schedule 15 minutes with us and bring your toughest plan.
Combined swab, combined bill. Verify the plan before you run it.
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Related: 87426 · 87804 · 87635
CPT is a registered trademark of the American Medical Association. This page is Valian's own plain-English summary for front-desk teams, not official CPT descriptor text, and is not billing or clinical advice. Coverage patterns are common plan behaviors; every plan differs. Verify benefits before the visit.