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Darkfield Microscope Exam for Spirochetes

Nationwide 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.

Facilitymedian $19 · 10th–90th $10$580%10%20%10th90th$19Professionalmedian $10 · 10th–90th $6$240%20%10th90th$10$0.2$2.0$20.0$200.0$2.0K$20.0K

Distribution of negotiated rates across all payers (price axis is log-scale). Facility and professional rates are different services and are charted separately. Need provider-level prices? Contact us.

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$9.33
Median
$19.95
Typical High
$54.95
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.32
Median
$9.77
Typical High
$22.91
BCBS
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$16.98
Typical High
$51.29
BCBS
Setting
Professional
Modifier
Global
Typical Low
$5.62
Median
$6.92
Typical High
$22.91
Cigna
Setting
Facility
Modifier
Global
Typical Low
$9.12
Median
$22.39
Typical High
$52.48
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.76
Median
$13.49
Typical High
$27.54
United
Setting
Facility
Modifier
Global
Typical Low
$5.50
Median
$11.22
Typical High
$15.85
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$6.76
Typical High
$16.60