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Darkfield Microscope Exam for Spirochetes

Delaware 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?

$9.33

Typical negotiated rate. In Delaware, July 2026.

Insurers have agreed to pay about $9.33 for this service. Most negotiated rates run $8.91 to $16.60.

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 3 insurance carriers under federal price transparency rules.

How much rates vary

Facilitymedian $13 · 10th to 90th $13 to $13Professionalmedian $9 · 10th to 90th $9 to $34
$5.0$10.0$20.0facility $13professional $9

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. Small sample; interpret with caution. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$12.88
Median
$12.88
Typical High
$12.88
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$9.33
Typical High
$33.88
Cigna
Setting
Facility
Modifier
Global
Typical Low
$7.41
Median
$7.41
Typical High
$7.41
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.92
Median
$8.13
Typical High
$20.89
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$7.59
Typical High
$15.85

Where Delaware 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.

Delaware $9.33 · 43rd 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.