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Gel Diffusion Test For A Specific Substance

Iowa 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?

$18.20

Typical negotiated rate. In Iowa, July 2026.

Insurers have agreed to pay about $18.20 for this service. The price depends on where it is billed: about $15.85 from a physician practice, and about $18.62 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$15.85$9.12 to $44.67
FacilityA hospital or hospital-owned outpatient department$18.62$12.02 to $31.62

How much rates vary

Facilitymedian $19 · 10th to 90th $9 to $91Professionalmedian $16 · 10th to 90th $8 to $79
$10$20$50$100facility $19professional $16

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
$9.12
Median
$22.91
Typical High
$91.20
Aetna
Setting
Professional
Modifier
Global
Typical Low
$9.12
Median
$44.67
Typical High
$79.43
Cigna
Setting
Professional
Modifier
Global
Typical Low
$14.79
Median
$22.91
Typical High
$28.18
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$12.02
Median
$29.51
Typical High
$51.29
Medica
Setting
Facility
Modifier
Global
Typical Low
$12.02
Median
$15.49
Typical High
$37.15
Medica
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$14.45
Typical High
$31.62
Midlands
Setting
Professional
Modifier
Global
Typical Low
$14.79
Median
$15.85
Typical High
$15.85
Midlands
Setting
Facility
Modifier
Global
Typical Low
$14.79
Median
$14.79
Typical High
$14.79
United
Setting
Facility
Modifier
Global
Typical Low
$12.02
Median
$12.02
Typical High
$27.54
United
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$10.00
Typical High
$30.20
Wellmark
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$12.02
Typical High
$12.02

Where Iowa 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.

Iowa· 6th of 51

$18.20

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.