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Blood Test Measuring Clot Formation Time

Illinois rates for HCPCS 85635

This blood test measures how long it takes a blood sample to clot after a specific clot-triggering substance is added to the sample. It's used to help evaluate bleeding or clotting problems by focusing on a particular step in the clotting process. It's a simple blood draw, often ordered alongside other clotting tests.

Rates data updated October 2026.

How much does Blood Test Measuring Clot Formation Time cost?

$8.13

Typical negotiated rate. In Illinois, October 2026.

Insurers have agreed to pay about $8.13 for this service. The price depends on where it is billed: about $7.59 from a physician practice, and about $18.20 from a hospital or other facility.

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.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$7.59$7.59 to $9.77
FacilityA hospital or hospital-owned outpatient department$18.20$11.75 to $29.51

How much rates vary

Facilitymedian $18 · 10th to 90th $9 to $52Professionalmedian $8 · 10th to 90th $4 to $16
$5$10$20$50$100facility $18professional $8

Distribution of negotiated rates across all payers (price axis is log-scale). Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$8.13
Median
$15.14
Typical High
$29.51
Aetna
Setting
Professional
Modifier
None
Typical Low
$7.76
Median
$8.13
Typical High
$9.77
Ambetter
Setting
Professional
Modifier
None
Typical Low
$6.03
Median
$6.03
Typical High
$6.03
BCBS Illinois
Setting
Facility
Modifier
None
Typical Low
$8.71
Median
$13.18
Typical High
$102.33
BCBS Illinois
Setting
Professional
Modifier
None
Typical Low
$3.63
Median
$7.59
Typical High
$7.59
Cigna
Setting
Facility
Modifier
None
Typical Low
$10.96
Median
$22.39
Typical High
$40.74
Cigna
Setting
Professional
Modifier
None
Typical Low
$5.13
Median
$11.48
Typical High
$17.38
Hally Health
Setting
Professional
Modifier
None
Typical Low
$9.77
Median
$15.85
Typical High
$120.23
Hally Health
Setting
Facility
Modifier
None
Typical Low
$100.00
Median
$100.00
Typical High
$100.00
Hally Health
Setting
Professional
Modifier
None
Typical Low
$12.88
Median
$12.88
Typical High
$12.88
Molina
Setting
Professional
Modifier
None
Typical Low
$5.37
Median
$6.92
Typical High
$12.30
United
Setting
Facility
Modifier
None
Typical Low
$9.77
Median
$11.75
Typical High
$25.12
United
Setting
Professional
Modifier
None
Typical Low
$3.31
Median
$6.31
Typical High
$10.72
4 more rates with less common billing modifiers

A modifier changes what was billed, for example a reduced or repeated service. Each of these modifiers carries under 10% of the published rates for this code. Modifier combinations, and modifiers with fewer than 30 rates for a carrier, are not listed.

Insurance Carrier
Aetna
Setting
Facility
Modifier
52 · Reduced service
Typical Low
$4.07
Median
$7.08
Typical High
$14.79
Aetna
Setting
Facility
Modifier
53 · Discontinued
Typical Low
$1.62
Median
$2.88
Typical High
$6.03
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$4.07
Median
$4.07
Typical High
$4.90
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$1.62
Median
$1.62
Typical High
$1.95

Where Illinois sits

The same service costs 4.1 times more in Kansas than in Nebraska. 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· 39th of 51

$8.13

KS $26.92NE $6.61

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.