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Darkfield Microscope Exam for Spirochetes

New Mexico 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.

How much does Darkfield Microscope Exam for Spirochetes cost?

$10.72

Typical negotiated rate. In New Mexico, July 2026.

Insurers have agreed to pay about $10.72 for this service. The price depends on where it is billed: about $9.33 from a physician practice, and about $16.60 from a hospital or other facility. The two figures are alternatives, not parts of one bill.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 5 insurance carriers under federal price transparency rules.

Where it's billed changes the price

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$9.33$8.51 to $13.49
FacilityA hospital or hospital-owned outpatient department$16.60$10.23 to $33.88

How much rates vary

Facilitymedian $17 · 10th to 90th $8 to $36Professionalmedian $9 · 10th to 90th $7 to $74
$5.0$10.0$20.0$50.0facility $17professional $9

Distribution of negotiated rates across all payers (price axis is log-scale). Each curve is scaled to its own total: facility and professional rates are different services, shown together to compare where they cluster. Small sample; interpret with caution. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$16.98
Median
$33.88
Typical High
$36.31
Aetna
Setting
Professional
Modifier
Global
Typical Low
$8.51
Median
$11.22
Typical High
$74.13
BCBS
Setting
Professional
Modifier
Global
Typical Low
$6.92
Median
$9.33
Typical High
$9.33
Cigna
Setting
Facility
Modifier
Global
Typical Low
$7.41
Median
$7.41
Typical High
$7.41
Cigna
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$16.60
Typical High
$24.55
Providence
Setting
Facility
Modifier
Global
Typical Low
$10.00
Median
$13.49
Typical High
$19.95
Providence
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$17.38
Typical High
$28.18
United
Setting
Facility
Modifier
Global
Typical Low
$4.27
Median
$10.23
Typical High
$16.98
United
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$6.61
Typical High
$8.51

Where New Mexico sits

The same service costs 2.4 times more in Hawaii than in Washington, DC. Every bar is a state, most expensive first. Pick one to see its carriers and full range.

New Mexico $10.72 · 32nd of 51
HI $20.42DC $8.51

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.