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Clotting-regulation Protein Blood Test, Protein S

Illinois 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?

$26.30

Typical negotiated rate. In Illinois, July 2026.

Insurers have agreed to pay about $26.30 for this service. The price depends on where it is billed: about $12.88 from a physician practice, and about $74.13 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 7 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$12.88$11.75 to $16.98
FacilityA hospital or hospital-owned outpatient department$74.13$25.70 to $224

How much rates vary

Facilitymedian $74 · 10th to 90th $16 to $295Professionalmedian $13 · 10th to 90th $3 to $32
$5$10$20$50$100$200facility $74professional $13

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
$15.85
Median
$83.18
Typical High
$295.12
Aetna
Setting
Professional
Modifier
Global
Typical Low
$12.30
Median
$13.80
Typical High
$31.62
Ambetter
Setting
Professional
Modifier
Global
Typical Low
$7.59
Median
$9.33
Typical High
$9.33
BCBS
Setting
Facility
Modifier
Global
Typical Low
$20.42
Median
$41.69
Typical High
$158.49
BCBS
Setting
Professional
Modifier
Global
Typical Low
$3.47
Median
$10.47
Typical High
$11.75
Cigna
Setting
Facility
Modifier
Global
Typical Low
$17.38
Median
$35.48
Typical High
$69.18
Cigna
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$17.38
Typical High
$27.54
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$16.98
Median
$30.20
Typical High
$309.03
Hally Health
Setting
Facility
Modifier
Global
Typical Low
$100.00
Median
$100.00
Typical High
$100.00
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$19.95
Median
$19.95
Typical High
$19.95
Molina
Setting
Professional
Modifier
Global
Typical Low
$19.05
Median
$19.05
Typical High
$19.05
United
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$15.49
Typical High
$30.90
United
Setting
Professional
Modifier
Global
Typical Low
$6.46
Median
$11.48
Typical High
$15.49

Where Illinois 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.

Illinois· 14th of 51

$26.30

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.