go back

Darkfield Microscope Exam for Spirochetes

Rhode Island 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?

$10.47

Typical negotiated rate. In Rhode Island, October 2026.

Insurers have agreed to pay about $10.47 for this service. The price depends on where it is billed: about $9.12 from a physician practice, and about $13.49 from a hospital or other facility.

Few insurers publish rates for this combination, so treat this figure as a rough guide.

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 4 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$9.12$6.92 to $16.60
FacilityA hospital or hospital-owned outpatient department$13.49$12.02 to $17.78

How much rates vary

Facilitymedian $13 · 10th to 90th $11 to $35Professionalmedian $9 · 10th to 90th $6 to $19
$5$10$20$50facility $13professional $9

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

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Professional
Modifier
None
Typical Low
$9.12
Median
$9.12
Typical High
$10.23
BCBS Rhode Island
Setting
Facility
Modifier
None
Typical Low
$10.72
Median
$12.88
Typical High
$17.78
BCBS Rhode Island
Setting
Professional
Modifier
None
Typical Low
$6.31
Median
$8.51
Typical High
$22.39
Cigna
Setting
Facility
Modifier
None
Typical Low
$10.47
Median
$26.92
Typical High
$47.86
Cigna
Setting
Professional
Modifier
None
Typical Low
$6.46
Median
$13.18
Typical High
$17.38
United
Setting
Facility
Modifier
None
Typical Low
$13.49
Median
$13.49
Typical High
$13.49
United
Setting
Professional
Modifier
None
Typical Low
$3.16
Median
$6.92
Typical High
$18.62

Where Rhode Island 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.

Rhode Island· 30th of 51

$10.47

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.