MLT certification is a professional credential that verifies a medical laboratory technician has met national education and competency standards to perform clinical lab testing. The two main certifying bodies in the United States are the American Society for Clinical Pathology Board of Certification (ASCP BOC) and American Medical Technologists (AMT). Earning either credential, often written as MLT(ASCP) or MLT(AMT) after your name, signals to employers that you’re qualified to work in a clinical laboratory running the tests that help doctors diagnose disease.
What MLT Certification Actually Proves
A certified medical laboratory technician handles routine clinical lab tests: preparing blood and tissue specimens, operating automated analyzers, running standardized procedures, and documenting results that clinicians use to make treatment decisions. The certification exam tests your knowledge across four core disciplines: blood banking (immunohematology), chemistry, hematology, and microbiology. Passing it tells employers you can work competently across all of these areas, not just one.
MLT certification is distinct from MLS (Medical Laboratory Scientist) certification, which requires a bachelor’s degree. MLTs typically hold an associate degree and perform routine testing under the supervision of MLS professionals or lab managers. MLS professionals handle more complex and manual procedures, validate unusual results, investigate irregular findings, and often supervise MLTs. Think of the MLT credential as the entry point into clinical lab work, with MLS as the next step up in autonomy and complexity.
Education Requirements
Both ASCP and AMT require, at minimum, an associate degree or equivalent coursework. The specifics vary depending on which route you take.
For the ASCP’s standard route, you need an associate degree (or at least 60 semester hours of college credit) plus completion of an accredited MLT program. These programs are typically accredited by the National Accrediting Agency for Clinical Laboratory Sciences (NAACLS) and include clinical rotations covering all four core disciplines. NAACLS standards require that students achieve entry-level competency in each major discipline before graduating, though unlike phlebotomy programs, there’s no single mandated hour count for clinical rotations. Programs design their own clinical experiences to meet competency benchmarks.
AMT offers a similar education route requiring an associate degree from a NAACLS-accredited or otherwise approved MLT program. If you graduated more than five years ago, AMT requires at least 1,040 hours (roughly six months) of recent clinical lab experience. AMT also has an alternate education route for people who hold an associate degree or 60 semester hours with at least 24 semester hours in lab science or clinical lab courses, combined with 1,040 hours of clinical lab work experience within the past five years. The specific science breakdown for that alternate route is 6 semester hours of chemistry, 6 of biology, and 12 additional hours in chemistry, biology, or medical laboratory technology in any combination.
Military Route
Both ASCP and AMT recognize completion of a 50-week U.S. military medical laboratory training course. ASCP requires this plus an associate degree or 60 semester hours (including 6 hours each in chemistry and biology) and completion within the last 10 years. AMT requires the same military training completed within the last five years, with the same experience requirement applying if you finished the program more than five years ago.
The Certification Exam
The ASCP MLT exam is scored on a scale of 100 to 999, and you need a 400 to pass. The application fee is $235. Questions cover all four core disciplines plus general lab knowledge like quality control and safety practices. The exam is computer-based and administered at testing centers around the country.
AMT offers its own MLT certification exam with a similar scope across blood banking, chemistry, hematology, and microbiology. Both credentials are widely accepted by employers, though ASCP certification tends to be more commonly requested in job postings. Some people hold both.
Keeping Your Certification Current
ASCP certification requires ongoing maintenance through their Credential Maintenance Program. Every three years, you need to earn 36 continuing education points. The breakdown is specific: 2 points each in blood banking, chemistry, hematology, and microbiology (8 points total across the four disciplines), 1 point in laboratory or patient safety (covering topics like quality control and quality assurance), 1 point in medical ethics (covering HIPAA, compliance, confidentiality, and similar topics), and 26 points in lab specialty areas or related professional development of your choosing. All continuing education must be completed within your current three-year cycle.
State Licensure Requirements
National certification and state licensure are two different things. Most states accept ASCP or AMT certification as sufficient to work in a lab, but several states require their own state-issued license on top of national certification. These currently include California, Florida, Hawaii, Louisiana, Montana, Nevada, North Dakota, New York, Tennessee, and West Virginia, plus Puerto Rico.
California and New York are notable because they offer state-licensure-only exams administered through the ASCP BOC. Passing one of these state-specific exams does not grant you ASCP BOC certification. If you plan to work in one of these states, you’ll want to confirm whether you need the national credential, the state license, or both.
Salary and Job Outlook
The median annual wage for clinical laboratory technologists and technicians was $61,890 as of May 2024, according to the Bureau of Labor Statistics. That figure combines both MLTs (associate-level) and MLS professionals (bachelor’s-level), so entry-level MLT salaries typically fall below that median. Employment in the field is projected to grow 2 percent from 2024 to 2034, which is slower than average. That said, lab staffing shortages in many regions mean certified MLTs often find steady demand for their skills, particularly in hospitals, reference laboratories, and clinics.
MLT Certification as a Career Starting Point
Many MLTs use the credential as a launchpad. After working for a few years, some pursue a bachelor’s degree and sit for the MLS certification exam, which opens the door to higher pay, more complex testing responsibilities, and supervisory roles. Others specialize in a particular discipline like microbiology or blood banking. The associate-level entry point makes MLT certification one of the faster paths into healthcare. Most accredited programs take about two years to complete, meaning you can go from enrollment to a certified, working lab professional in roughly that time frame.