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Gel Diffusion Test For A Specific Substance

Tennessee 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?

$9.55

Typical negotiated rate. In Tennessee, July 2026.

Insurers have agreed to pay about $9.55 for this service. The price depends on where it is billed: about $9.33 from a physician practice, and about $29.51 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 6 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$9.33$8.91 to $11.48
FacilityA hospital or hospital-owned outpatient department$29.51$10.72 to $43.65

How much rates vary

Facilitymedian $30 · 10th to 90th $9 to $85Professionalmedian $9 · 10th to 90th $8 to $16
$5$10$20$50$100$200facility $30professional $9

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
$9.33
Median
$38.90
Typical High
$61.66
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$8.91
Typical High
$13.80
Ambetter
Setting
Professional
Modifier
Global
Typical Low
$7.41
Median
$8.32
Typical High
$31.62
BCBS
Setting
Professional
Modifier
Global
Typical Low
$12.02
Median
$16.22
Typical High
$16.22
Cigna
Setting
Facility
Modifier
Global
Typical Low
$8.91
Median
$25.12
Typical High
$48.98
Cigna
Setting
Professional
Modifier
Global
Typical Low
$5.50
Median
$9.12
Typical High
$18.20
Lucent Health
Setting
Facility
Modifier
Global
Typical Low
$194.98
Median
$194.98
Typical High
$194.98
United
Setting
Facility
Modifier
Global
Typical Low
$5.01
Median
$12.02
Typical High
$12.02
United
Setting
Professional
Modifier
Global
Typical Low
$5.01
Median
$9.33
Typical High
$16.60

Where Tennessee 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.

Tennessee· 50th of 51

$9.55

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.