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Darkfield Microscope Exam for Spirochetes

Washington 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 $17 · 10th–90th $11$470%10%20%10th90th$17Professionalmedian $11 · 10th–90th $7$200%20%40%10th90th$11$5.0$10.0$20.0$50.0$100.0

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
$10.72
Median
$20.89
Typical High
$61.66
Aetna
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$10.72
Typical High
$74.13
Asuris Northwest Health
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$14.13
Typical High
$30.90
Asuris Northwest Health
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$10.23
Typical High
$11.48
Cigna
Setting
Facility
Modifier
Global
Typical Low
$11.75
Median
$23.99
Typical High
$36.31
Cigna
Setting
Professional
Modifier
Global
Typical Low
$7.08
Median
$12.02
Typical High
$17.78
Molina
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$10.00
Typical High
$64.57
Pacific Source
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$22.91
Pacific Source
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$11.22
Typical High
$15.14
Premera BCBS
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$18.20
Typical High
$30.90
Premera BCBS
Setting
Professional
Modifier
Global
Typical Low
$10.23
Median
$10.23
Typical High
$13.49
Regence BlueShield
Setting
Facility
Modifier
Global
Typical Low
$11.22
Median
$16.98
Typical High
$30.20
Regence BlueShield
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$10.23
Typical High
$11.22
United
Setting
Facility
Modifier
Global
Typical Low
$10.72
Median
$13.49
Typical High
$13.49
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$5.62
Typical High
$12.59
Wellpoint
Setting
Professional
Modifier
Global
Typical Low
$5.13
Median
$5.89
Typical High
$20.42