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Blood Test Measuring Clot Formation Time

Massachusetts 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?

$11.22

Typical negotiated rate. In Massachusetts, October 2026.

Insurers have agreed to pay about $11.22 for this service. The price depends on where it is billed: about $9.77 from a physician practice, and about $13.80 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 9 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$9.77$8.71 to $15.85
FacilityA hospital or hospital-owned outpatient department$13.80$10.23 to $26.92

How much rates vary

Facilitymedian $14 · 10th to 90th $9 to $35Professionalmedian $10 · 10th to 90th $6 to $28
$10$100$1Kfacility $14professional $10

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
$9.33
Median
$26.30
Typical High
$43.65
Aetna
Setting
Professional
Modifier
None
Typical Low
$9.33
Median
$9.33
Typical High
$11.22
AllWays Health Partners
Setting
Facility
Modifier
None
Typical Low
$7.41
Median
$10.96
Typical High
$31.62
AllWays Health Partners
Setting
Professional
Modifier
None
Typical Low
$5.89
Median
$9.77
Typical High
$25.12
BCBS Massachusetts
Setting
Facility
Modifier
None
Typical Low
$13.80
Median
$24.55
Typical High
$42.66
BCBS Massachusetts
Setting
Professional
Modifier
None
Typical Low
$9.33
Median
$9.55
Typical High
$12.59
Cigna
Setting
Facility
Modifier
None
Typical Low
$6.46
Median
$14.13
Typical High
$25.70
Cigna
Setting
Professional
Modifier
None
Typical Low
$6.76
Median
$12.02
Typical High
$38.02
Fallon Health
Setting
Facility
Modifier
None
Typical Low
$13.80
Median
$16.22
Typical High
$4,897.79
Fallon Health
Setting
Professional
Modifier
None
Typical Low
$13.80
Median
$13.80
Typical High
$16.22
Harvard Pilgrim
Setting
Professional
Modifier
None
Typical Low
$4.90
Median
$9.77
Typical High
$38.02
Mass General Brigham
Setting
Facility
Modifier
None
Typical Low
$7.41
Median
$10.96
Typical High
$31.62
Mass General Brigham
Setting
Professional
Modifier
None
Typical Low
$5.89
Median
$9.77
Typical High
$25.12
United
Setting
Facility
Modifier
None
Typical Low
$9.77
Median
$9.77
Typical High
$33.11
United
Setting
Professional
Modifier
None
Typical Low
$3.98
Median
$7.59
Typical High
$20.89
Well Sense
Setting
Facility
Modifier
None
Typical Low
$8.71
Median
$10.96
Typical High
$17.38
Well Sense
Setting
Professional
Modifier
None
Typical Low
$10.23
Median
$10.23
Typical High
$12.30
3 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
Professional
Modifier
52 · Reduced service
Typical Low
$4.68
Median
$4.68
Typical High
$5.62
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$1.86
Median
$1.86
Typical High
$2.24
Fallon Health
Setting
Facility
Modifier
QW · Waived lab test
Typical Low
$9.77
Median
$12.88
Typical High
$15.14

Where Massachusetts 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.

Massachusetts· 21st of 51

$11.22

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.