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Darkfield Microscope Exam for Spirochetes

Montana 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 October 2026.

How much does Darkfield Microscope Exam for Spirochetes cost?

$16.22

Typical negotiated rate. In Montana, October 2026.

Insurers have agreed to pay about $16.22 for this service. The price depends on where it is billed: about $15.14 from a physician practice, and about $19.50 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 5 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$15.14$6.76 to $16.22
FacilityA hospital or hospital-owned outpatient department$19.50$16.98 to $21.88

How much rates vary

Facilitymedian $19 · 10th to 90th $16 to $26Professionalmedian $15 · 10th to 90th $5 to $20
$5$10$20$50facility $19professional $15

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
Professional
Modifier
None
Typical Low
$12.88
Median
$12.88
Typical High
$12.88
Cigna
Setting
Facility
Modifier
None
Typical Low
$16.22
Median
$16.98
Typical High
$33.11
Cigna
Setting
Professional
Modifier
None
Typical Low
$13.18
Median
$16.22
Typical High
$16.22
MountainHealth Co-op
Setting
Facility
Modifier
None
Typical Low
$14.13
Median
$19.50
Typical High
$26.30
MountainHealth Co-op
Setting
Professional
Modifier
None
Typical Low
$15.14
Median
$16.98
Typical High
$20.89
Providence
Setting
Facility
Modifier
None
Typical Low
$16.22
Median
$16.60
Typical High
$33.11
Providence
Setting
Professional
Modifier
None
Typical Low
$10.23
Median
$10.23
Typical High
$16.22
United
Setting
Professional
Modifier
None
Typical Low
$4.79
Median
$4.79
Typical High
$11.22

Where Montana sits

The same service costs 3.5 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.

Montana· 8th of 51

$16.22

AK $25.70KY $7.24

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.