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Gel Diffusion Test For A Specific Substance

Rhode Island rates for HCPCS 86331

A laboratory test in which the sample and a matching testing solution are placed in separate wells cut into a gel and left to spread slowly toward each other. If the substance being looked for is present, a visible line forms in the gel where the two meet. The result is a present or absent answer, reported once for each substance the laboratory checks for.

Rates data updated July 2026.

How much does Gel Diffusion Test For A Specific Substance cost?

$12.59

Typical negotiated rate. In Rhode Island, July 2026.

Insurers have agreed to pay about $12.59 for this service. The price depends on where it is billed: about $12.59 from a physician practice, and about $36.31 from a hospital or other facility. The two figures are alternatives, not parts of one bill.

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 4 insurance carriers under federal price transparency rules.

Where it's billed changes the price

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$12.59$8.91 to $12.59
FacilityA hospital or hospital-owned outpatient department$36.31$15.49 to $69.18

How much rates vary

Facilitymedian $36 · 10th to 90th $14 to $76Professionalmedian $13 · 10th to 90th $7 to $20
$10$20$50facility $36professional $13

Distribution of negotiated rates across all payers (price axis is log-scale). Each curve is scaled to its own total: facility and professional rates are different services, shown together to compare where they cluster. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$19.50
Median
$48.98
Typical High
$75.86
Aetna
Setting
Professional
Modifier
Global
Typical Low
$7.76
Median
$12.59
Typical High
$12.59
BCBS
Setting
Facility
Modifier
Global
Typical Low
$13.80
Median
$14.45
Typical High
$24.55
BCBS
Setting
Professional
Modifier
Global
Typical Low
$6.76
Median
$8.91
Typical High
$17.78
Cigna
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$28.84
Typical High
$50.12
Cigna
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$13.18
Typical High
$18.20
United
Setting
Facility
Modifier
Global
Typical Low
$14.45
Median
$14.45
Typical High
$23.99
United
Setting
Professional
Modifier
Global
Typical Low
$6.76
Median
$11.48
Typical High
$23.44

Where Rhode Island sits

The same service costs 2.6 times more in South Dakota than in Washington, DC. 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.

Rhode Island· 30th of 51

$12.59

SD $22.91DC $8.91

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.