Every billing code / CPT 83521 / University of Washington Medical Ctr
CPT 83521 at University of Washington Medical Ctr
Immunoassay
University of Washington Medical Ctr, Seattle
This name is the CMS category the code belongs to (CMS's Restructured BETOS Classification System), shared with similar codes. The official CPT description belongs to the American Medical Association and isn't shown.
What University of Washington Medical Ctr publishes for this code: as an outpatient
University of Washington Medical Ctr’s prices for CPT 83521, as an outpatient| Who pays | Hospital’s fee (lowest – highest) | Doctor’s fee the hospital lists |
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| Commercial insuranceInsurer rates | $20.72 – $54.166 plans | — |
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| Medicare AdvantageInsurer rates | $17.27 – $19.005 plans | — |
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| Cash pricePaying yourself, without insurance | $42.49 – $89.79 | — |
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| List priceBefore any discount; few people pay it | $60.70 – $128 | — |
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Lowest and highest amounts University of Washington Medical Ctr lists for this code as an outpatient, including lines it lists for both settings or without saying which. Its price file is dated 2026-04-01. This is one line of a bill; most care brings several.
Bills to expect
The hospital’s fee is the price above. Doctors usually send their own bills. Their amounts here are what original Medicare allows in Seattle (King County) for 2026, and a private-plan estimate of 118% to 179% of that (the range found across studies of what insurers pay doctors). Those are estimates, not quotes.
Bills to expect for CPT 83521 at University of Washington Medical Ctr| Bill | What it’s for | Original Medicare allows | Private plan estimate |
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| Hospital's feeThe hospital | The lab test, including drawing the sample | — | The price above |
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A lab test usually comes as one bill from the lab that runs it.
Original Medicare amounts are only for people on original Medicare. Your share depends on your plan’s deductible, copay and coinsurance.
Compare CPT 83521 at every Washington hospital, with Medicare’s reference amounts.