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Clotting-regulation Protein Blood Test, Protein S

Maryland 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?

$13.80

Typical negotiated rate. In Maryland, July 2026.

Insurers have agreed to pay about $13.80 for this service. The price depends on where it is billed: about $13.80 from a physician practice, and about $112 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 6 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$13.80$11.48 to $14.13
FacilityA hospital or hospital-owned outpatient department$112$13.80 to $155

How much rates vary

Facilitymedian $112 · 10th to 90th $11 to $166Professionalmedian $14 · 10th to 90th $10 to $30
$10$20$50$100facility $112professional $14

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
$11.22
Median
$112.20
Typical High
$173.78
Aetna
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$13.80
Typical High
$60.26
CareFirst
Setting
Professional
Modifier
Global
Typical Low
$5.37
Median
$12.30
Typical High
$15.14
Cigna
Setting
Facility
Modifier
Global
Typical Low
$8.13
Median
$10.72
Typical High
$19.95
Cigna
Setting
Professional
Modifier
Global
Typical Low
$8.32
Median
$15.14
Typical High
$38.02
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$15.49
Median
$18.20
Typical High
$29.51
United
Setting
Facility
Modifier
Global
Typical Low
$6.46
Median
$7.24
Typical High
$13.80
United
Setting
Professional
Modifier
Global
Typical Low
$6.92
Median
$9.12
Typical High
$14.45
Wellpoint
Setting
Professional
Modifier
Global
Typical Low
$6.03
Median
$10.47
Typical High
$22.91

Where Maryland 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.

Maryland· 47th of 51

$13.80

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.