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Clotting-regulation Protein Blood Test, Protein S

Rhode Island rates for HCPCS 85306

This is a blood test that measures protein S, one of the body's natural proteins that helps keep blood clotting properly balanced. It's typically ordered as part of a work-up after an unexplained or recurrent blood clot, to check whether a deficiency in this protein might be a contributing factor. It's usually run together with a small set of related clot-regulation tests.

Rates data updated July 2026.

How much does Clotting-regulation Protein Blood Test, Protein S cost?

$18.62

Typical negotiated rate. In Rhode Island, July 2026.

Insurers have agreed to pay about $18.62 for this service. The price depends on where it is billed: about $14.79 from a physician practice, and about $67.61 from a hospital or other facility. The two figures are alternatives, not parts of one bill.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 4 insurance carriers under federal price transparency rules.

Where it's billed changes the price

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$14.79$11.48 to $14.79
FacilityA hospital or hospital-owned outpatient department$67.61$30.20 to $89.13

How much rates vary

Facilitymedian $68 · 10th to 90th $18 to $138Professionalmedian $15 · 10th to 90th $9 to $28
$10$20$50$100facility $68professional $15

Distribution of negotiated rates across all payers (price axis is log-scale). Each curve is scaled to its own total: facility and professional rates are different services, shown together to compare where they cluster. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$42.66
Median
$67.61
Typical High
$138.04
Aetna
Setting
Professional
Modifier
Global
Typical Low
$13.49
Median
$14.79
Typical High
$14.79
BCBS
Setting
Facility
Modifier
Global
Typical Low
$17.38
Median
$18.20
Typical High
$28.84
BCBS
Setting
Professional
Modifier
Global
Typical Low
$8.71
Median
$11.48
Typical High
$22.91
Cigna
Setting
Facility
Modifier
Global
Typical Low
$14.13
Median
$36.31
Typical High
$64.57
Cigna
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$15.85
Typical High
$22.91
United
Setting
Facility
Modifier
Global
Typical Low
$18.20
Median
$18.20
Typical High
$30.20
United
Setting
Professional
Modifier
Global
Typical Low
$8.71
Median
$13.80
Typical High
$28.18

Where Rhode Island sits

The same service costs 3.6 times more in West Virginia than in Kentucky. Every bar is a state, most expensive first. Touch or drag across it to read any state, then open that state for its carriers and full range.

Rhode Island· 26th of 51

$18.62

WV $50.12KY $13.80

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.