TB tests for work or school are available at urgent care clinics, retail pharmacy clinics, county health departments, and your doctor's office - typically $20 to $100 cash without insurance. The skin test (PPD) requires two visits: placement, then a reading 48 to 72 hours later.
The options: urgent care - the commonest route, walk-ins, $25 to $80 for the skin test plus the return reading (some charge for both visits; ask). Retail pharmacy clinics (CVS MinuteClinic and similar) - same test, similar prices, evening hours. County health departments - usually the cheapest, sometimes $20 or free for employment requirements. The test types: the PPD skin test (a small injection in the forearm, then you MUST return 48 to 72 hours later for the reading - miss the window and you start over), or the blood test (IGRA - QuantiFERON or T-SPOT) - one visit, no return, $50 to $150, preferred if you have had the BCG vaccine (common outside the US) since the skin test cross-reacts with it. Check which one your employer accepts. A positive result does not mean active TB - usually it means latent TB (dormant, not contagious, treatable), and the next step is a chest X-ray to confirm. Emergencies skip this list: chest pain, trouble breathing, stroke signs, severe bleeding, or thoughts of self-harm mean call 911, or 988 for a mental health crisis in the US.
What to do
Common questions
How much does a TB test cost without insurance?
Skin test (PPD): $25 to $80 at urgent care and pharmacy clinics - ask whether the price includes the return reading visit, since some clinics bill both. Blood test (IGRA): $50 to $150. County health departments frequently beat both, especially for employment or school requirements - call yours. For a one-time employment requirement, the skin test at a health department is usually the cheapest complete route.
What happens if I don't go back for the reading?
The test is void - the PPD reaction must be measured 48 to 72 hours after placement, and outside that window the result is unreadable. You will need to pay for and place a new test. This is the most common way TB testing goes wrong for busy people, so book the reading when you book the placement - or choose the IGRA blood test, which has no return visit at all.
Does a positive TB test mean I have tuberculosis?
Almost never in the scary sense. A positive skin or blood test usually means latent TB infection: you were exposed at some point, the bacteria are dormant, you have no symptoms and are not contagious. About 5-10% of latent infections ever activate. The follow-up is a chest X-ray to rule out active disease, then typically a preventive antibiotic course (3 to 4 months) to clear the dormant bacteria - which employers and schools fully accept.
I had the BCG vaccine as a kid - will my TB test be positive?
The skin test may show a false positive, because BCG (given routinely in many countries) cross-reacts with it. The IGRA blood test does not cross-react with BCG, which is exactly why it exists - if you were vaccinated, ask for the blood test from the start and skip the ambiguity. Bring your vaccination history to the visit. Emergencies skip this list: chest pain, trouble breathing, stroke signs, severe bleeding, or thoughts of self-harm mean call 911, or 988 for a mental health crisis in the US.