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Giardia Stool Antigen Test

Illinois rates for HCPCS 87329

This laboratory test checks a stool sample for antigens from Giardia lamblia, a parasite that can cause diarrhea and digestive symptoms after being picked up from contaminated water or food. It offers a faster and often more sensitive way to detect this parasite than examining the stool under a microscope.

Rates data updated October 2026.

How much does Giardia Stool Antigen Test cost?

$9.12

Typical negotiated rate. In Illinois, October 2026.

Insurers have agreed to pay about $9.12 for this service. The price depends on where it is billed: about $9.12 from a physician practice, and about $25.70 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$9.12$7.24 to $9.77
FacilityA hospital or hospital-owned outpatient department$25.70$15.85 to $39.81

How much rates vary

Facilitymedian $26 · 10th to 90th $13 to $69Professionalmedian $9 · 10th to 90th $3 to $16
$5$10$20$50$100facility $26professional $9

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
$10.00
Median
$14.45
Typical High
$36.31
Aetna
Setting
Professional
Modifier
None
Typical Low
$9.77
Median
$10.23
Typical High
$15.49
Ambetter
Setting
Professional
Modifier
None
Typical Low
$7.41
Median
$15.85
Typical High
$15.85
BCBS Illinois
Setting
Facility
Modifier
None
Typical Low
$15.14
Median
$25.70
Typical High
$123.03
BCBS Illinois
Setting
Professional
Modifier
None
Typical Low
$3.47
Median
$9.12
Typical High
$9.12
Cigna
Setting
Facility
Modifier
None
Typical Low
$13.49
Median
$28.18
Typical High
$50.12
Cigna
Setting
Professional
Modifier
None
Typical Low
$6.31
Median
$14.13
Typical High
$21.38
Hally Health
Setting
Professional
Modifier
None
Typical Low
$12.59
Median
$19.05
Typical High
$100.00
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
$15.49
Median
$15.49
Typical High
$15.49
Molina
Setting
Professional
Modifier
None
Typical Low
$6.61
Median
$8.32
Typical High
$15.14
United
Setting
Facility
Modifier
None
Typical Low
$12.02
Median
$14.45
Typical High
$15.14
United
Setting
Professional
Modifier
None
Typical Low
$5.01
Median
$9.12
Typical High
$14.13
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
$4.90
Median
$8.71
Typical High
$18.20
Aetna
Setting
Facility
Modifier
53 · Discontinued
Typical Low
$1.95
Median
$3.47
Typical High
$7.24
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$4.90
Median
$4.90
Typical High
$6.03
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$1.95
Median
$1.95
Typical High
$2.40

Where Illinois sits

The same service costs 4.7 times more in Alaska than in New Jersey. 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· 49th of 51

$9.12

AK $39.81NJ $8.51

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.