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Immunodiffusion Test

Washington rates for HCPCS 86329

A laboratory method in which a sample and a matching reagent spread toward each other through a soft gel and form a visible line where they meet, showing that a specific antibody or protein is present. It is reported for substances that do not have a standard named test of their own. It gives a present-or-absent style answer rather than a precise measured amount.

Rates data updated October 2026.

How much does Immunodiffusion Test cost?

$13.18

Typical negotiated rate. In Washington, October 2026.

Insurers have agreed to pay about $13.18 for this service. The price depends on where it is billed: about $12.59 from a physician practice, and about $20.89 from a hospital or other facility.

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 9 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$12.59$9.12 to $14.13
FacilityA hospital or hospital-owned outpatient department$20.89$15.49 to $28.18

How much rates vary

Facilitymedian $21 · 10th to 90th $14 to $39Professionalmedian $13 · 10th to 90th $6 to $17
$10$20$50facility $21professional $13

Distribution of negotiated rates across all payers (price axis is log-scale). Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$13.18
Median
$13.18
Typical High
$43.65
Aetna
Setting
Professional
Modifier
None
Typical Low
$13.18
Median
$13.18
Typical High
$16.98
Asuris Northwest Health
Setting
Facility
Modifier
None
Typical Low
$10.47
Median
$16.22
Typical High
$38.90
Asuris Northwest Health
Setting
Professional
Modifier
None
Typical Low
$10.47
Median
$12.59
Typical High
$14.13
Cigna
Setting
Facility
Modifier
None
Typical Low
$13.49
Median
$25.70
Typical High
$36.31
Cigna
Setting
Professional
Modifier
None
Typical Low
$8.71
Median
$14.79
Typical High
$20.42
Molina
Setting
Professional
Modifier
None
Typical Low
$8.91
Median
$12.30
Typical High
$12.30
Pacific Source
Setting
Facility
Modifier
None
Typical Low
$14.13
Median
$14.13
Typical High
$28.18
Premera BCBS
Setting
Facility
Modifier
None
Typical Low
$14.13
Median
$24.55
Typical High
$38.90
Premera BCBS
Setting
Professional
Modifier
None
Typical Low
$12.59
Median
$12.59
Typical High
$16.98
Regence BlueShield
Setting
Facility
Modifier
None
Typical Low
$14.13
Median
$23.44
Typical High
$38.90
Regence BlueShield
Setting
Professional
Modifier
None
Typical Low
$10.47
Median
$12.59
Typical High
$14.13
United
Setting
Facility
Modifier
None
Typical Low
$14.13
Median
$16.98
Typical High
$16.98
United
Setting
Professional
Modifier
None
Typical Low
$5.89
Median
$6.31
Typical High
$15.85
Wellpoint
Setting
Professional
Modifier
None
Typical Low
$6.31
Median
$14.13
Typical High
$25.12
2 more rates with less common billing modifiers

A modifier changes what was billed, for example a reduced or repeated service. Each of these modifiers carries under 10% of the published rates for this code. Modifier combinations, and modifiers with fewer than 30 rates for a carrier, are not listed.

Insurance Carrier
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$6.61
Median
$6.61
Typical High
$8.32
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$2.63
Median
$2.63
Typical High
$3.39

Where Washington sits

The same service costs 3.2 times more in Alaska than in Kentucky. 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.

Washington· 32nd of 51

$13.18

AK $31.62KY $9.77

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.