Where to Get a TB Test: Locations, Cost, and What to Expect

Where to Get a TB Test

Getting a TB test is one of those things you need to do quickly — usually because an employer needs the results before you can start working or a school requires it before you can attend classes. The good news: it's fast, widely available, and not expensive. The main decision is choosing between a skin test (cheaper, requires a return visit) and a blood test (more convenient, more expensive). This guide covers every place you can get tested, what it costs at each, and how to get results as quickly as possible.

TB testing — screening for tuberculosis infection — is required for many jobs, school enrolments, and immigration applications. If you need a TB test, the good news is that testing is widely available at multiple types of healthcare facilities: pharmacies, urgent care centres, local health departments, primary care doctors' offices, occupational health clinics, and community health centres. Most locations offer walk-in or same-day appointments, and the test itself takes only a few minutes (though results take 48–72 hours for the traditional skin test).

The two main types of TB tests are the tuberculin skin test (TST, also called the Mantoux test or PPD test) and the TB blood test (IGRA — Interferon-Gamma Release Assay, including QuantiFERON and T-SPOT). The skin test involves a small injection just under the skin of your forearm and requires you to return 48–72 hours later to have the injection site read by a healthcare provider.

The blood test requires a single blood draw with results available in 1–3 days — no return visit needed. Both tests detect latent TB infection (you've been exposed to TB bacteria but aren't sick and aren't contagious).

Choosing where to get tested depends on your budget, schedule, and what your employer or school requires. Some employers accept only specific TB test types or require testing from specific providers. Insurance coverage varies — many plans cover TB testing for free as preventive care, but some locations charge $20–$100+ depending on the test type. This guide covers all the major places to get a TB test, what each costs, and how to find the most convenient option near you.

Whether you need a TB test for a new healthcare job, a school requirement, a volunteer position, or an immigration medical exam, the process is straightforward once you know where to go and what to expect. Most people complete the entire process — from scheduling to receiving results — within a week.

TB Skin Test (TST/PPD): What to Expect

The tuberculin skin test — also called the TST, PPD test, or Mantoux test — is the most common TB screening method. It's been used for over a century and remains the standard test required by many employers and schools. Here's exactly what happens during the process.

During the test, a healthcare provider injects a tiny amount of purified protein derivative (PPD) — a substance made from TB bacteria — just under the skin on the inside of your forearm. The injection creates a small bump (called a wheal) that's about the size of a pencil eraser. The injection itself feels like a brief pinch — less uncomfortable than a flu shot because the needle is very small and the amount injected is minimal. The entire process takes about 2 minutes.

You return to the same facility 48–72 hours later to have the injection site read. The healthcare provider examines your forearm and measures any induration (firm swelling) at the injection site using a ruler. Redness alone doesn't count — only the firm bump is measured. The size of the induration determines whether the test is positive or negative, with the cutoff varying based on your risk factors (5mm, 10mm, or 15mm depending on your immune status and exposure history).

A negative result means no significant induration — you're unlikely to have latent TB infection. A positive result means you may have been exposed to TB bacteria. A positive skin test does NOT mean you have active tuberculosis disease — it means further evaluation is needed (typically a chest X-ray) to determine whether the infection is latent (asymptomatic, not contagious) or active (symptomatic, potentially contagious). Most people with positive skin tests have latent TB infection and are completely healthy.

Important timing considerations: if you miss the 48–72 hour reading window, the test is invalid and must be repeated. Don't scratch, rub, or cover the injection site with a bandage between the injection and the reading. Don't apply creams or lotions to the site. If the site itches (some people experience mild itching), place a cold washcloth over it rather than scratching.

Plan your schedule so both visits (injection and reading) fit within the required window — this often means getting the injection on Monday or Tuesday so the reading falls on Wednesday through Friday, avoiding weekends when many facilities are closed.

Who Needs a TB Test?

TB testing is required in specific professional, educational, and immigration contexts — and it's recommended for anyone at elevated risk of TB exposure. Understanding whether you need a test (and what type) prevents unnecessary testing while ensuring you meet requirements.

Healthcare workers are the largest group requiring routine TB testing. Hospitals, nursing homes, clinics, home health agencies, and other healthcare facilities typically require TB testing at hire and periodically thereafter (annually or with each new employment). This is because healthcare workers have regular exposure to patients who may have undiagnosed TB. Most healthcare employers require either a two-step skin test or a single blood test (IGRA) as baseline screening.

Students entering healthcare programmes (nursing, medical, dental, PA, PT, OT) need TB testing before clinical rotations — usually the same requirement as healthcare employees. Many universities also require TB testing for all incoming students, particularly those living in dormitories. The requirement exists because shared living spaces increase TB transmission risk if an infected student is present.

Childcare workers, teachers, and school staff in some states need TB testing as a condition of employment. Requirements vary by state — check your state's education department or childcare licensing agency for specific rules. Food handlers in certain jurisdictions may also need TB clearance, though this is less common than for healthcare and education workers.

Immigration applicants are required to undergo TB testing as part of the immigration medical examination (Form I-693). The USCIS-designated civil surgeon who performs your immigration physical administers or orders the TB test. The specific test type (skin test or blood test) and follow-up requirements are determined by CDC guidelines for immigration medical exams. If you're in the immigration process, your civil surgeon handles the TB testing — you don't need to arrange it separately.

People at elevated risk of TB exposure should get tested even without an employment or school requirement. Risk factors include: close contact with someone diagnosed with active TB, recent immigration from a country with high TB rates (most of sub-Saharan Africa, Southeast Asia, India, China, Russia), living or working in high-risk congregate settings (shelters, prisons, nursing homes), and immunocompromising conditions (HIV, organ transplant, certain medications). If any of these apply to you, ask your doctor about TB testing.

Understanding TB Test Results

TB test results require interpretation by a healthcare provider — they're not as simple as 'positive' or 'negative' in every context. Understanding what your results mean helps you respond appropriately and communicate with your employer or school.

A negative TB test (either skin or blood) means you're unlikely to have latent TB infection. For most employment and school requirements, a negative result is all you need — the provider documents the result on whatever form your employer or school requires, and you're cleared. Negative results don't need further follow-up unless you have symptoms of active TB (persistent cough lasting 3+ weeks, unexplained weight loss, night sweats, fever).

A positive TB test means you may have been exposed to TB bacteria at some point in your life. It does NOT mean you have active tuberculosis disease, and it does NOT mean you're contagious. The vast majority of people with positive TB tests have latent TB infection — the bacteria are present but dormant, you feel completely healthy, and you can't spread TB to others.

A positive result triggers follow-up: typically a chest X-ray to check for signs of active disease, and possibly a course of preventive treatment (antibiotics) to eliminate the latent infection and prevent it from becoming active in the future.

If your chest X-ray after a positive TB test is normal (no signs of active disease), you have latent TB infection. Your doctor may recommend preventive treatment — a course of isoniazid or rifampin taken for several months — to reduce the risk of the latent infection becoming active in the future.

Whether to take preventive treatment depends on your risk factors and is a discussion between you and your doctor. For employment purposes, a positive TB test with a normal chest X-ray typically satisfies the TB clearance requirement — you provide documentation of the positive test result plus the normal X-ray.

How to Find TB Testing Near You

Finding a convenient TB testing location takes a few minutes of searching — and the best option depends on your priorities (cost, speed, convenience, test type availability).

For the lowest cost, start with your local health department. Search '[your county] health department TB testing' or call your county health department directly. Many offer free or reduced-cost testing for residents. Hours are typically limited to weekday business hours, and appointments may be required.

For convenience, pharmacy clinics (CVS MinuteClinic, Walgreens) offer walk-in or easily scheduled appointments at locations you probably pass regularly. They're often open evenings and weekends, making them practical for people who can't take time off work during business hours. Costs without insurance are $35–$60 for the skin test.

For the blood test (IGRA), urgent care centres and primary care doctors' offices are your best options. Not all pharmacies offer the blood test — call ahead to confirm before visiting. Urgent care centres are walk-in friendly and can typically process the blood draw on the same day.

For employer-required testing, ask your employer whether they have a preferred provider or an existing contract with an occupational health clinic. Using the employer's designated provider often means the employer covers the cost directly (so you don't need to pay and wait for reimbursement) and the results are delivered in the format the employer needs.

Search tools: Google Maps ('TB test near me'), GoodRx (compares prices at nearby locations), and your insurance company's provider directory (find in-network locations where the test is covered) are all useful for identifying specific locations, comparing prices, and checking availability.

When calling ahead, ask specifically whether the location offers the test type you need (skin or blood), whether walk-ins are accepted, and whether they can complete the required paperwork on your employer's or school's specific form. Not all locations carry the supplies for blood tests, and some smaller pharmacies may not always have PPD vials in stock — confirming availability before you make the drive there prevents frustrating wasted trips and unnecessary delays in getting your required test results back on time.

TB Testing for Healthcare Workers

Healthcare workers undergo more TB testing than any other occupation because of their regular exposure to patients who may have undiagnosed tuberculosis. Understanding the specific requirements helps you navigate the employment and compliance process smoothly.

Baseline testing at hire is standard — most healthcare employers require either a two-step TB skin test or a single TB blood test (IGRA) before you start working. The two-step skin test involves two separate PPD injections 1–4 weeks apart, each with a 48–72 hour reading. The blood test replaces the two-step process with a single blood draw. If you have documentation of a negative TB test within the past 12 months from a previous employer, some facilities accept it instead of repeating baseline testing — ask your new employer whether prior results are accepted.

Annual screening is required at many healthcare facilities — either an annual skin test, annual blood test, or an annual symptom screening questionnaire (for workers with a documented history of positive TB tests who've already been evaluated with a chest X-ray). The method and frequency depend on your facility's infection control policies, your TB test history, and your state's regulations.

If you have a history of a positive TB test, you don't need to repeat the skin test — once positive, you'll always test positive, so repeated skin tests are unnecessary and potentially cause severe local reactions. Instead, your annual screening involves a symptom questionnaire and, if your employer requires it, periodic chest X-rays. Document your positive TB test history, the date of your last chest X-ray, and any treatment you received — you'll need to provide this documentation to every new healthcare employer.

Keep a personal file with copies of all TB-related documentation: the original positive test result, subsequent chest X-ray reports, treatment records if applicable, and any annual symptom screening questionnaires you've completed. Having this file ready saves significant time and confusion during employment onboarding — rather than scrambling to obtain records from previous employers or testing facilities each time you change jobs.