Greetings.
A vulvar biopsy can cost $750 to $1500 depending on the facility.
Since you do not have insurance, you can also visit one of the centers run by the Health Resources and Services Administration, they offer affordable quality healthcare to people without insurance like you. You can find a health center near you by clicking here : http://www.hrsa.gov/
That way cost would be far low.
Please feel free for your follow up questions.
Dr. Arun
Doctor (MD)
MBBS, MS (General Surgery), Post-doctoral Fellowship in Sports Medicine