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Darkfield Microscope Exam for Spirochetes

Maryland 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 $7 · 10th–90th $5$150%10%20%10th90th$7Professionalmedian $9 · 10th–90th $7$440%20%10th90th$9$5.0$10.0$20.0$50.0

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

Insurance Carrier
Aetna
Setting
Professional
Modifier
Global
Typical Low
$7.41
Median
$8.51
Typical High
$43.65
CareFirst
Setting
Professional
Modifier
Global
Typical Low
$3.89
Median
$9.12
Typical High
$10.96
Cigna
Setting
Facility
Modifier
Global
Typical Low
$6.03
Median
$7.76
Typical High
$14.79
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.31
Median
$11.22
Typical High
$28.18
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$13.49
Typical High
$21.88
United
Setting
Facility
Modifier
Global
Typical Low
$3.16
Median
$4.79
Typical High
$8.51
United
Setting
Professional
Modifier
Global
Typical Low
$5.13
Median
$6.76
Typical High
$10.72
Wellpoint
Setting
Professional
Modifier
Global
Typical Low
$4.37
Median
$7.76
Typical High
$16.98