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Gel Diffusion Test For A Specific Substance

North Carolina 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?

$10.72

Typical negotiated rate. In North Carolina, July 2026.

Insurers have agreed to pay about $10.72 for this service. The price depends on where it is billed: about $9.55 from a physician practice, and about $23.99 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$9.55$9.55 to $14.45
FacilityA hospital or hospital-owned outpatient department$23.99$10.47 to $38.02

How much rates vary

Facilitymedian $24 · 10th to 90th $10 to $49Professionalmedian $10 · 10th to 90th $8 to $35
$10$20$50$100facility $24professional $10

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
$9.55
Median
$28.18
Typical High
$39.81
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$9.55
Typical High
$34.67
Ambetter
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$8.32
Typical High
$8.32
BCBS
Setting
Facility
Modifier
Global
Typical Low
$27.54
Median
$48.98
Typical High
$48.98
BCBS
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$8.32
Typical High
$10.23
Cigna
Setting
Facility
Modifier
Global
Typical Low
$8.32
Median
$23.44
Typical High
$54.95
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.17
Median
$8.32
Typical High
$18.20
Medcost
Setting
Professional
Modifier
Global
Typical Low
$10.00
Median
$29.51
Typical High
$44.67
Medcost
Setting
Facility
Modifier
Global
Typical Low
$9.55
Median
$10.96
Typical High
$22.39
Medcost
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$20.89
Typical High
$23.44
United
Setting
Facility
Modifier
Global
Typical Low
$6.31
Median
$15.85
Typical High
$20.89
United
Setting
Professional
Modifier
Global
Typical Low
$6.03
Median
$7.94
Typical High
$16.60
Wellcare
Setting
Facility
Modifier
Global
Typical Low
$194.98
Median
$194.98
Typical High
$194.98

Where North Carolina 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.

North Carolina· 45th of 51

$10.72

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.