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Darkfield Microscope Exam for Spirochetes

Maine 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 $18 · 10th–90th $11$540%20%10th90th$18Professionalmedian $9 · 10th–90th $6$130%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. Need provider-level prices? Contact us.

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$50.12
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$9.12
Typical High
$11.22
Anthem BCBS
Setting
Facility
Modifier
Global
Typical Low
$13.18
Median
$53.70
Typical High
$58.88
Anthem BCBS
Setting
Professional
Modifier
Global
Typical Low
$4.47
Median
$6.46
Typical High
$7.94
Cigna
Setting
Facility
Modifier
Global
Typical Low
$7.94
Median
$15.85
Typical High
$25.70
Cigna
Setting
Professional
Modifier
Global
Typical Low
$7.94
Median
$11.48
Typical High
$16.60
Harvard Pilgrim
Setting
Professional
Modifier
Global
Typical Low
$7.94
Median
$11.22
Typical High
$13.80
Martin's Point
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$50.12
Martin's Point
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$11.22
Typical High
$27.54
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$11.22
Typical High
$21.38