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Darkfield Microscope Exam for Spirochetes

Massachusetts 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 $22 · 10th–90th $10$400%10%10th90th$22Professionalmedian $11 · 10th–90th $5$260%20%40%10th90th$11$5.0$20.0$100.0$500.0$2.0K$10.0K$50.0K

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
$5.50
Median
$16.22
Typical High
$33.11
Aetna
Setting
Professional
Modifier
Global
Typical Low
$5.50
Median
$10.23
Typical High
$25.70
AllWays Health Partners
Setting
Facility
Modifier
Global
Typical Low
$10.23
Median
$15.85
Typical High
$100.00
AllWays Health Partners
Setting
Professional
Modifier
Global
Typical Low
$4.90
Median
$11.22
Typical High
$27.54
BCBS
Setting
Facility
Modifier
Global
Typical Low
$22.39
Median
$28.18
Typical High
$39.81
BCBS
Setting
Professional
Modifier
Global
Typical Low
$7.41
Median
$10.72
Typical High
$10.72
Cigna
Setting
Facility
Modifier
Global
Typical Low
$7.41
Median
$17.78
Typical High
$29.51
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.92
Median
$13.18
Typical High
$29.51
Fallon Health
Setting
Facility
Modifier
Global
Typical Low
$6.61
Median
$45.71
Typical High
$7,079.46
Fallon Health
Setting
Professional
Modifier
Global
Typical Low
$16.22
Median
$16.22
Typical High
$19.05
Harvard Pilgrim
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$23.99
Mass General Brigham
Setting
Facility
Modifier
Global
Typical Low
$10.23
Median
$15.85
Typical High
$100.00
Mass General Brigham
Setting
Professional
Modifier
Global
Typical Low
$4.90
Median
$11.22
Typical High
$27.54
United
Setting
Facility
Modifier
Global
Typical Low
$5.62
Median
$11.22
Typical High
$18.62
United
Setting
Professional
Modifier
Global
Typical Low
$4.90
Median
$10.23
Typical High
$24.55