Medical laboratory technologists and clinical laboratory scientists run the tests that drive most clinical decisions, from basic blood counts to blood bank crossmatching. Because their work touches specimens and results for every patient in a hospital or clinic, the people who hire them tend to screen carefully. That screening comes from two different directions: a state licensing board, if the state regulates the profession, and the hiring laboratory or health system itself, which has its own duties under federal lab rules and under the Fair Credit Reporting Act (FCRA).
This post explains what each piece actually checks, where the rules come from, and what to expect if you are applying for a medical laboratory technologist (MLT) or medical laboratory scientist (MLS) role.
Does every state require a background check to get licensed?
No. Only a subset of states license or certify clinical laboratory personnel at all, and the rule varies state by state. States that do license the profession generally require fingerprinting and a criminal history review as part of the licensure application, similar to nursing or pharmacy licensing. States that do not license the role leave screening entirely to the employer.
New York is one example of a state that licenses clinical laboratory technology as a profession, with its own application, education, and exam requirements administered through the state education department’s licensing office. You can review the current requirements directly from the New York State Education Department’s Clinical Laboratory Technology profession page. California regulates clinical laboratory personnel through its Laboratory Field Services program, which licenses clinical laboratory scientists, technicians, and specialists and requires background clearance as part of licensure; details are on the California Department of Public Health’s Laboratory Field Services page.
Not every state takes this approach. Some states have no laboratory personnel licensing law at all, and in those states a lab job applicant will not face a state licensing background check, only whatever screening the employer chooses to run. If you are not sure whether your state licenses the role, check your state health department or professional licensing board directly rather than assuming either way, since enumerating every state’s rule here would go stale and some boards change requirements without much notice.
What does federal law (CLIA) actually require for lab personnel?
The Clinical Laboratory Improvement Amendments (CLIA) set federal quality standards for virtually every laboratory that tests human specimens in the United States. The personnel qualification rules for testing staff are codified in federal regulation at 42 CFR Part 493, Subpart M, which spells out the education, training, and experience a person needs to perform high complexity, moderate complexity, or waived testing. You can read the current text of that subpart on the Electronic Code of Federal Regulations, Title 42 Part 493 Subpart M.
It is important to be precise here: CLIA’s personnel standards are about qualifications, not about criminal background. The regulation does not require a criminal history check as a condition of being qualified lab testing personnel. CMS maintains a general overview of the CLIA program, including links to the regulatory structure, on its Clinical Laboratory Improvement Amendments page. Because CLIA itself is silent on background screening, that responsibility shifts entirely to the state licensing board (where one exists) and to the employer.
What does the employer typically screen for?
Hospitals, reference labs, and clinics that employ laboratory technologists generally run their own screening on top of, or in place of, any state licensing check. This typically includes:
- Criminal history at the county, state, and sometimes federal level, consistent with the FCRA and applicable state and local fair chance laws.
- Federal exclusion screening against the Department of Health and Human Services Office of Inspector General’s List of Excluded Individuals/Entities (LEIE). A healthcare employer that knowingly employs or bills for the work of an excluded individual can face civil penalties, so checking the LEIE before hire, and periodically afterward, is standard practice. The list and search tool are maintained by the HHS Office of Inspector General Exclusions Program.
- Drug screening, since lab staff frequently have access to controlled substances used as reagents or standards and work in safety sensitive clinical environments.
- State abuse and neglect registry checks for roles that involve direct contact with patients, particularly in long term care, pediatric, or home health settings, where state law may require a registry check in addition to a criminal background check.
- License and certification verification, confirming an active state license where one is required, and any voluntary certification such as ASCP certification, directly with the issuing body rather than relying on the applicant’s documents alone.
State licensing check versus employer background check
| Step | Who runs it | What it typically covers | Required everywhere? |
|---|---|---|---|
| State licensure application | State board (where one exists) | Education verification, exam, fingerprint based criminal history | No, only in states that license the role |
| CLIA personnel qualification review | Employer / lab director, per 42 CFR 493 Subpart M | Education, training, experience to perform testing at the required complexity level | Yes, for any CLIA certified lab |
| OIG LEIE exclusion check | Employer | Whether the applicant is excluded from federal health care programs | Expected for any employer billing Medicare or Medicaid |
| FCRA background check | Employer, through a consumer reporting agency | Criminal history, employment and education verification, and other consumer report items | Required to follow FCRA rules whenever a third party report is used, regardless of state licensing |
What are the employer’s duties under the FCRA?
When a hospital, lab, or staffing agency uses a third party consumer reporting agency to run a background check on a medical laboratory technologist applicant, the employer has specific obligations under the FCRA. These include providing a clear, standalone disclosure that a background check will be conducted, obtaining the applicant’s written authorization, and, if the employer intends to take an adverse action such as not hiring based on the report, sending a pre-adverse action notice with a copy of the report and a copy of the Summary of Rights, followed by a final adverse action notice if the decision stands. The Federal Trade Commission publishes plain language guidance for employers on these obligations, available on its Using Consumer Reports: What Employers Need to Know page. A background check does not automatically disqualify an applicant, and it will not necessarily surface every past record, since reporting depends on state law, the age of the record, and what the search actually covers. Employers should not assume a report “will show” a given record; the result depends on the specific jurisdictions searched.
What could show up and affect eligibility?
Because lab technologists work with patient specimens, results that affect treatment, and sometimes controlled substances, employers and state boards generally pay close attention to convictions involving fraud, theft, drug diversion, or patient abuse or neglect. Whether a particular conviction is disqualifying depends on the specific state licensing statute, the employer’s own policy, and in many states, an individualized assessment of the nature of the offense, how long ago it occurred, and its relevance to the job, consistent with EEOC guidance on the use of criminal records in employment decisions. There is no universal list of automatically disqualifying offenses that applies in every state, so applicants with a record should check with the specific state board, where one exists, rather than assume the worst or assume a clean path.
Frequently asked questions
Do all medical laboratory technologists need a state license?
No. Only the states that have adopted a clinical laboratory personnel licensing law require it. Where no such law exists, there is no state licensing background check, though employers still run their own screening.
Does CLIA require a criminal background check?
No. CLIA personnel qualification rules under 42 CFR Part 493 Subpart M govern education, training, and experience for testing personnel. They do not impose a criminal background check requirement; that comes from state licensing law, where it exists, or from the employer’s own hiring policy.
Why would a lab employer check the OIG exclusion list?
A health care employer that bills Medicare or Medicaid can face penalties for employing someone who is excluded from federal health care programs. Checking the HHS OIG List of Excluded Individuals/Entities before hire, and periodically during employment, is a standard compliance step.
Can a past conviction automatically disqualify someone from a lab technologist job?
It depends on the state and the employer. Some state licensing boards weigh the nature and age of an offense against the duties of the role rather than applying an automatic bar. There is no single rule that applies nationwide, so the specific state board or employer policy controls.
What notices must an employer send before deciding not to hire based on a background check?
Under the FCRA, an employer intending to take adverse action based on a consumer report generally must send a pre-adverse action notice with a copy of the report and the Summary of Rights, give the applicant an opportunity to respond, and then send a final adverse action notice if the decision stands.
Does a background check always show every past criminal record?
Not necessarily. What a report surfaces depends on which jurisdictions are searched and what state law allows to be reported. Applicants and employers should not assume a single check is exhaustive.
Employers building a laboratory hiring program can review background screening options at Reveal Background, and related roles are covered in our posts on nurse background check requirements and medical assistant background check requirements.
This article is general information, not legal advice. Employers should consult qualified counsel about screening obligations in their specific states.
