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Chemistry Test For A Specific Substance

Illinois rates for HCPCS 84285

A laboratory chemistry test that measures how much of one particular substance is present in a sample sent to the lab. It is ordered when the amount of that substance is expected to answer a specific question about a person's health, and the result is read together with the rest of the picture.

Rates data updated October 2026.

How much does Chemistry Test For A Specific Substance cost?

$20.89

Typical negotiated rate. In Illinois, October 2026.

Insurers have agreed to pay about $20.89 for this service. The price depends on where it is billed: about $19.50 from a physician practice, and about $46.77 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 6 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$19.50$19.50 to $26.30
FacilityA hospital or hospital-owned outpatient department$46.77$28.18 to $75.86

How much rates vary

Facilitymedian $47 · 10th to 90th $19 to $126Professionalmedian $19 · 10th to 90th $13 to $46
$5$10$20$50$100$200facility $47professional $19

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
$20.89
Median
$39.81
Typical High
$75.86
Aetna
Setting
Professional
Modifier
None
Typical Low
$19.50
Median
$20.89
Typical High
$22.91
BCBS Illinois
Setting
Facility
Modifier
None
Typical Low
$16.98
Median
$33.88
Typical High
$257.04
BCBS Illinois
Setting
Professional
Modifier
None
Typical Low
$19.50
Median
$19.50
Typical High
$19.50
Cigna
Setting
Facility
Modifier
None
Typical Low
$28.18
Median
$54.95
Typical High
$104.71
Cigna
Setting
Professional
Modifier
None
Typical Low
$13.18
Median
$29.51
Typical High
$44.67
Hally Health
Setting
Professional
Modifier
None
Typical Low
$25.12
Median
$40.74
Typical High
$125.89
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
$33.11
Median
$33.11
Typical High
$33.11
Molina
Setting
Professional
Modifier
None
Typical Low
$13.80
Median
$13.80
Typical High
$31.62
United
Setting
Facility
Modifier
None
Typical Low
$25.12
Median
$30.20
Typical High
$64.57
United
Setting
Professional
Modifier
None
Typical Low
$6.46
Median
$15.14
Typical High
$26.92
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
$10.23
Median
$18.20
Typical High
$38.02
Aetna
Setting
Facility
Modifier
53 · Discontinued
Typical Low
$4.17
Median
$7.24
Typical High
$15.14
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$10.23
Median
$10.23
Typical High
$12.59
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$4.17
Median
$4.17
Typical High
$5.01

Where Illinois sits

The same service costs 3.5 times more in Kansas than in Alabama. 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· 36th of 51

$20.89

KS $57.54AL $16.22

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.