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Darkfield Microscope Exam for Spirochetes

California 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 $35 · 10th–90th $13$1230%10%10th90th$35Professionalmedian $12 · 10th–90th $7$490%10%20%10th90th$12$5.0$20.0$100.0$500.0$2.0K

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
$19.50
Median
$48.98
Typical High
$131.83
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.32
Median
$13.18
Typical High
$74.13
Anthem BCBS
Setting
Facility
Modifier
Global
Typical Low
$6.46
Median
$28.84
Typical High
$56.23
Anthem BCBS
Setting
Professional
Modifier
Global
Typical Low
$5.62
Median
$9.33
Typical High
$40.74
Blue Shield
Setting
Facility
Modifier
Global
Typical Low
$26.92
Median
$75.86
Typical High
$158.49
Blue Shield
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$12.88
Typical High
$32.36
Cigna
Setting
Facility
Modifier
Global
Typical Low
$8.51
Median
$19.95
Typical High
$41.69
Cigna
Setting
Professional
Modifier
Global
Typical Low
$6.76
Median
$13.18
Typical High
$28.84
Contra Costa Health
Setting
Professional
Modifier
Global
Typical Low
$10.00
Median
$11.22
Typical High
$18.20
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$9.12
Median
$11.22
Typical High
$25.70
Lucent Health
Setting
Facility
Modifier
Global
Typical Low
$70.79
Median
$70.79
Typical High
$100.00
Molina
Setting
Professional
Modifier
Global
Typical Low
$5.62
Median
$5.62
Typical High
$11.22
Providence
Setting
Facility
Modifier
Global
Typical Low
$9.12
Median
$13.49
Typical High
$32.36
Providence
Setting
Professional
Modifier
Global
Typical Low
$6.76
Median
$10.47
Typical High
$28.84
Sutter Health Plus
Setting
Professional
Modifier
Global
Typical Low
$39.81
Median
$39.81
Typical High
$39.81
The Alliance
Setting
Professional
Modifier
Global
Typical Low
$9.12
Median
$11.48
Typical High
$19.05
United
Setting
Facility
Modifier
Global
Typical Low
$4.79
Median
$8.32
Typical High
$12.88
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$6.76
Typical High
$23.44