What does a medical lab technician do?
Medical laboratory technicians test samples of blood, urine, body fluids and tissue. Doctors rely on these results to diagnose illness, choose treatments and track how patients are doing. The work is important even though most patients never meet the people who do it.
MLTs run tests in several areas of the lab. In chemistry, they measure things like blood sugar and cholesterol. In hematology, they count blood cells and look for signs of infection or anemia. In microbiology, they grow and identify bacteria. In blood banking, they type blood and make sure transfusions are safe.
Much of the testing is done on automated analyzers, so MLTs set up, run, calibrate and troubleshoot the machines. They also run quality control checks, look at slides under a microscope and flag results that are far outside normal.
Accuracy and organization are essential. A mislabeled sample or missed error could affect a patient’s care.
Lab work suits people who like science, solving problems and following careful procedures. You need good eyesight and color vision for microscope work, steady hands for pipetting, and the patience to troubleshoot an analyzer when results do not look right. You also need to stay calm when the emergency department needs results fast. Communication still matters, since you will call critical results to nurses and doctors.
Tools of the job include automated analyzers, microscopes, centrifuges, pipettes, incubators and laboratory information systems.
Medical lab technicians work in:
- Hospital laboratories
- Commercial and reference labs
- Doctors’ offices and clinics
- Blood banks and donor centers
- Public health and research labs
A typical day
- Run quality control checks on analyzers
- Receive, sort and prepare patient samples
- Perform tests and review results for errors
- Report critical results to doctors or nurses quickly
- Maintain equipment and document your work
Medical lab technician pay and job outlook
BLS reports medical lab technicians and technologists together as clinical laboratory technologists and technicians. According to the U.S. Bureau of Labor Statistics, this group earns a median of $62,930 a year, or $30.26 an hour. Because the figure includes technologists, who usually have a bachelor’s degree, starting pay for technicians may be lower.
The BLS counts about 343,000 jobs in this group. Employment is projected to grow 3% from 2025 to 2035, with about 20,800 openings each year.
Pros
- A two-year degree leads to a professional healthcare career.
- Good fit if you like science and prefer limited patient contact.
- Hospitals run labs around the clock, so jobs exist in most areas.
- Clear path to advance to a medical laboratory scientist.
Cons
- Hospital labs often need night, weekend and holiday coverage.
- Growth is slower than some other healthcare jobs.
- Handling infectious samples requires strict safety habits.
- The work is detailed and can feel repetitive.
Training options: school is the main path
Associate degree. Most MLTs complete a two-year associate degree program. Look for programs accredited by the National Accrediting Agency for Clinical Laboratory Sciences (NAACLS), since graduating from one is the most direct route to ASCP certification. Programs include classroom courses, student lab work and a clinical practicum in a working lab.
Costs vary, from a few thousand dollars at some public community colleges to $25,000 or more at private schools.
Other routes. ASCP and AMT also allow some people to qualify through combinations of college coursework, military training and lab experience. These routes have specific rules, so check the certifying body’s current eligibility requirements.
Related, shorter options. If you want a faster start in the lab, phlebotomy or lab assistant roles can give you experience while you go to school.
Certification and licensing by state
Most states do not license medical lab personnel, but a minority do, including California, Florida and New York. Licensed states set their own rules for education, exams and continuing education, and some have different license types for different lab areas.
In states without licensing, employers usually require national certification. The main options are:
- MLT(ASCP): from the ASCP Board of Certification, the most widely recognized.
- MLT(AMT): from American Medical Technologists.
Both require continuing education to keep your credential current. Federal lab rules (CLIA) also set personnel standards for labs based on the complexity of the tests they run.
Specializations and where they lead
- Blood bank technician. Type and crossmatch blood for transfusions. Specialist credentials are available with more experience and education.
- Microbiology technician. Identify bacteria, fungi and other organisms that cause infection.
- Hematology or chemistry technician. Focus on blood cells or body chemistry.
- Medical laboratory scientist. With a bachelor’s degree, you can perform more complex testing and earn the MLS credential.
- Lab supervisor or quality specialist. Experienced lab professionals can manage teams, run quality programs or work for equipment makers.
How to choose a medical lab technician school
The right program prepares you for certification and real lab work. Ask these questions:
- Is the program accredited by NAACLS? This is the most direct route to ASCP eligibility.
- What are your certification exam pass rates? NAACLS programs track graduate outcomes.
- Where is the clinical practicum, and how long is it? Ask about hospital and reference lab partners.
- Does the program meet licensing rules in my state? This matters in states like California, Florida and New York.
- What is the total cost? Include lab fees, books and exam fees.
- Do you have an MLT-to-MLS pathway or transfer agreements? This helps if you plan to keep going.
- What job placement help do you offer? Ask where recent graduates work.
