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Darkfield Microscope Exam for Spirochetes

Illinois 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$490%10%10th90th$19Professionalmedian $10 · 10th–90th $7$260%20%10th90th$10$5.0$10.0$20.0$50.0$100.0$200.0

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
$9.33
Median
$17.78
Typical High
$30.90
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.71
Median
$9.77
Typical High
$23.99
BCBS
Setting
Facility
Modifier
Global
Typical Low
$14.79
Median
$30.20
Typical High
$117.49
BCBS
Setting
Professional
Modifier
Global
Typical Low
$3.47
Median
$7.41
Typical High
$8.71
Cigna
Setting
Facility
Modifier
Global
Typical Low
$12.59
Median
$26.30
Typical High
$52.48
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.03
Median
$13.49
Typical High
$20.42
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$12.30
Median
$22.39
Typical High
$117.49
Hally Health
Setting
Facility
Modifier
Global
Typical Low
$100.00
Median
$100.00
Typical High
$100.00
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$14.79
Median
$14.79
Typical High
$14.79
Molina
Setting
Professional
Modifier
Global
Typical Low
$6.17
Median
$6.17
Typical High
$6.17
United
Setting
Facility
Modifier
Global
Typical Low
$6.76
Median
$11.22
Typical High
$22.39
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$7.24
Typical High
$11.22