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Darkfield Microscope Exam for Spirochetes

Missouri 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?

$12.59

Typical negotiated rate. In Missouri, July 2026.

Insurers have agreed to pay about $12.59 for this service. The price depends on where it is billed: about $10.96 from a physician practice, and about $15.49 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 6 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$10.96$6.92 to $19.05
FacilityA hospital or hospital-owned outpatient department$15.49$11.22 to $19.95

How much rates vary

Facilitymedian $15 · 10th to 90th $11 to $27Professionalmedian $11 · 10th to 90th $6 to $27
$5.0$10.0$20.0$50.0$100.0facility $15professional $11

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
$10.96
Median
$19.05
Typical High
$26.30
Aetna
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$10.96
Typical High
$26.92
Anthem BCBS
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$39.81
Anthem BCBS
Setting
Professional
Modifier
Global
Typical Low
$5.62
Median
$9.12
Typical High
$28.84
BCBS
Setting
Facility
Modifier
Global
Typical Low
$21.38
Median
$22.39
Typical High
$25.70
Cigna
Setting
Facility
Modifier
Global
Typical Low
$15.14
Median
$21.88
Typical High
$63.10
Cigna
Setting
Professional
Modifier
Global
Typical Low
$5.89
Median
$10.72
Typical High
$29.51
Medica
Setting
Facility
Modifier
Global
Typical Low
$10.23
Median
$22.91
Typical High
$100.00
Medica
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$6.76
Typical High
$14.13
United
Setting
Facility
Modifier
Global
Typical Low
$6.46
Median
$11.22
Typical High
$13.80
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$8.32
Typical High
$15.14

Where Missouri 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.

Missouri $12.59 · 19th 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.