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Gel Diffusion Test For A Specific Substance

South Dakota 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?

$22.91

Typical negotiated rate. In South Dakota, July 2026.

Insurers have agreed to pay about $22.91 for this service. The price depends on where it is billed: about $19.50 from a physician practice, and about $30.90 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 7 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$19.50$9.33 to $32.36
FacilityA hospital or hospital-owned outpatient department$30.90$22.91 to $57.54

How much rates vary

Facilitymedian $31 · 10th to 90th $13 to $58Professionalmedian $19 · 10th to 90th $8 to $32
$10$20$50facility $31professional $19

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
$30.90
Median
$30.90
Typical High
$57.54
Aetna
Setting
Professional
Modifier
Global
Typical Low
$7.76
Median
$10.72
Typical High
$32.36
Avera
Setting
Facility
Modifier
Global
Typical Low
$10.96
Median
$12.02
Typical High
$17.78
Cigna
Setting
Facility
Modifier
Global
Typical Low
$22.91
Median
$22.91
Typical High
$22.91
Cigna
Setting
Professional
Modifier
Global
Typical Low
$13.49
Median
$22.91
Typical High
$28.18
Medica
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$18.62
Typical High
$66.07
Medica
Setting
Professional
Modifier
Global
Typical Low
$5.01
Median
$8.32
Typical High
$16.60
Sanford Health Plan
Setting
Professional
Modifier
Global
Typical Low
$16.98
Median
$28.84
Typical High
$33.11
United
Setting
Facility
Modifier
Global
Typical Low
$14.45
Median
$14.45
Typical High
$14.45
United
Setting
Professional
Modifier
Global
Typical Low
$5.01
Median
$10.72
Typical High
$16.60
Wellmark
Setting
Professional
Modifier
Global
Typical Low
$12.02
Median
$12.02
Typical High
$12.02

Where South Dakota 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.

South Dakota· 1st of 51

$22.91

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.