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Darkfield Microscope Exam for Spirochetes

Oregon rates for HCPCS 87166

Examination of fluid or scrapings under a microscope arranged so that light strikes the sample from the side, making extremely thin corkscrew-shaped bacteria stand out bright against a dark background. It is used mainly to look for the organism that causes syphilis in fluid taken from a sore, and it can give an answer straight away.

Rates data updated July 2026.

How much does Darkfield Microscope Exam for Spirochetes cost?

$13.49

Typical negotiated rate. In Oregon, July 2026.

Insurers have agreed to pay about $13.49 for this service. The price depends on where it is billed: about $14.13 from a physician practice, and about $12.30 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 8 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$14.13$11.22 to $16.22
FacilityA hospital or hospital-owned outpatient department$12.30$11.22 to $20.89

How much rates vary

Facilitymedian $12 · 10th to 90th $11 to $30Professionalmedian $14 · 10th to 90th $11 to $24
$5.0$20.0$100.0$500.0facility $12professional $14

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
$14.79
Median
$20.89
Typical High
$51.29
Aetna
Setting
Professional
Modifier
Global
Typical Low
$10.96
Median
$14.45
Typical High
$74.13
Cigna
Setting
Facility
Modifier
Global
Typical Low
$18.20
Median
$29.51
Typical High
$40.74
Cigna
Setting
Professional
Modifier
Global
Typical Low
$7.76
Median
$12.88
Typical High
$21.38
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$23.44
Median
$25.12
Typical High
$28.84
Moda Health
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$14.13
Moda Health
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$14.13
Typical High
$22.91
Pacific Source
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$22.91
Pacific Source
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$13.49
Providence
Setting
Facility
Modifier
Global
Typical Low
$10.96
Median
$15.85
Typical High
$33.88
Providence
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$13.49
Typical High
$79.43
Regence BlueShield
Setting
Facility
Modifier
Global
Typical Low
$16.98
Median
$33.88
Typical High
$44.67
Regence BlueShield
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$11.48
Typical High
$14.45
United
Setting
Facility
Modifier
Global
Typical Low
$7.08
Median
$16.98
Typical High
$16.98
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$6.46
Typical High
$15.85

Where Oregon sits

The same service costs 2.4 times more in Hawaii than in Washington, DC. Every bar is a state, most expensive first. Pick one to see its carriers and full range.

Oregon $13.49 · 16th of 51
HI $20.42DC $8.51

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.