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Chemistry Test For A Specific Substance

Washington 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?

$23.44

Typical negotiated rate. In Washington, October 2026.

Insurers have agreed to pay about $23.44 for this service. The price depends on where it is billed: about $22.91 from a physician practice, and about $38.02 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$22.91$16.22 to $25.12
FacilityA hospital or hospital-owned outpatient department$38.02$27.54 to $50.12

How much rates vary

Facilitymedian $38 · 10th to 90th $25 to $69Professionalmedian $23 · 10th to 90th $10 to $30
$10$20$50$100facility $38professional $23

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
$23.44
Median
$23.44
Typical High
$77.62
Aetna
Setting
Professional
Modifier
None
Typical Low
$23.44
Median
$23.44
Typical High
$28.18
Asuris Northwest Health
Setting
Facility
Modifier
None
Typical Low
$19.05
Median
$27.54
Typical High
$69.18
Asuris Northwest Health
Setting
Professional
Modifier
None
Typical Low
$19.05
Median
$22.91
Typical High
$25.12
Cigna
Setting
Facility
Modifier
None
Typical Low
$26.30
Median
$42.66
Typical High
$64.57
Cigna
Setting
Professional
Modifier
None
Typical Low
$14.79
Median
$26.92
Typical High
$36.31
Molina
Setting
Professional
Modifier
None
Typical Low
$16.22
Median
$22.39
Typical High
$22.39
Pacific Source
Setting
Facility
Modifier
None
Typical Low
$25.12
Median
$28.18
Typical High
$51.29
Premera BCBS
Setting
Facility
Modifier
None
Typical Low
$25.12
Median
$43.65
Typical High
$69.18
Premera BCBS
Setting
Professional
Modifier
None
Typical Low
$22.91
Median
$22.91
Typical High
$30.20
Regence BlueShield
Setting
Facility
Modifier
None
Typical Low
$25.12
Median
$41.69
Typical High
$69.18
Regence BlueShield
Setting
Professional
Modifier
None
Typical Low
$19.05
Median
$22.91
Typical High
$25.12
United
Setting
Facility
Modifier
None
Typical Low
$25.12
Median
$30.20
Typical High
$30.20
United
Setting
Professional
Modifier
None
Typical Low
$10.47
Median
$11.22
Typical High
$28.18
Wellpoint
Setting
Professional
Modifier
None
Typical Low
$11.22
Median
$25.12
Typical High
$45.71
2 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
$11.75
Median
$11.75
Typical High
$14.13
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$4.79
Median
$4.79
Typical High
$5.62

Where Washington 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.

Washington· 30th of 51

$23.44

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.