The authoritative source for the current list of laboratories certified by the Substance Abuse and Mental Health Services Administration (SAMHSA) is the official SAMHSA Certified Lab List. Certification status, laboratory names, addresses, contacts, and testing capabilities can change. Confirm the information directly on that page before ordering a test, selecting a vendor, or relying on a laboratory for a workplace program.
SAMHSA-certified laboratories perform an important quality-control function in federally regulated drug testing. A certified laboratory must meet federal requirements for analytical procedures, quality assurance, personnel, equipment, reporting, and security. Certification does not mean that every laboratory offers every testing service, accepts every specimen type, or handles every type of employment test.
This guide explains how to use the official list, distinguish laboratory certification from other credentials, and coordinate testing with medical review officers, collectors, employers, and, where applicable, Department of Transportation requirements. It is general information, not legal, medical, employment, or compliance advice for a particular situation.
What Is a SAMHSA-Certified Laboratory?
A SAMHSA-certified laboratory is a laboratory approved under the federal workplace drug-testing framework to conduct specified drug tests according to applicable federal standards. The laboratory analyzes specimens and reports results through the required process. It does not usually make the final employment decision, and it is not the same organization as the collection site or medical review officer.
Certification is tied to the laboratory and the federal testing authority under which it operates. A facility may advertise many forms of toxicology testing, but that marketing alone does not establish that the facility is certified for federally regulated testing. Employers should verify the laboratory in the official SAMHSA list and confirm that the planned test is within the laboratory’s current scope.
Why Does SAMHSA Certification Matter?
Federal workplace testing depends on consistent laboratory methods and documented controls. Certification helps create a common baseline for specimen handling, analytical testing, quality control, recordkeeping, and reporting. It also helps employers avoid relying on an unverified provider for a test that must follow federal procedures.
Certification is especially important when a result may affect a safety-sensitive position, a regulated employment program, or an employee’s ability to perform regulated duties. A laboratory’s use of advanced equipment or its claim of high accuracy is not a substitute for verifying the applicable federal certification.
Where Can You Find the Current SAMHSA Lab List?
Use the official SAMHSA Certified Lab List. This is the source to check when identifying laboratories that currently hold the relevant certification. Do not rely solely on an old vendor brochure, a search-engine result, a copied directory, or a third-party list.
To confirm the list:
- Open the official SAMHSA page immediately before making a selection.
- Review the laboratories shown on the current page or document.
- Match the laboratory’s legal or listed name and location to the information supplied by the testing vendor.
- Check whether the laboratory’s listed status and scope fit the test being ordered.
- Save a dated copy or internal record of the verification for your compliance file.
- Recheck the list when a contract is renewed, a vendor changes, or a compliance question arises.
A list checked today may not answer what was certified on an earlier date. If a dispute concerns historical status, ask the relevant parties for contemporaneous records and obtain professional compliance advice.
What Information Should You Confirm on the List?
Start with the laboratory’s exact name and physical location. A parent company, collection network, call center, or online ordering platform may use a different trade name. Confirm which entity actually performs the laboratory analysis.
Also review any available details concerning:
- Certification status or listing status
- Laboratory location and contact information
- Types of federally authorized testing associated with the laboratory
- Specimen or testing capabilities identified by the official source
- Instructions or limitations supplied by SAMHSA
If the public listing does not answer a specific question, contact the laboratory or qualified compliance professional. Do not infer capability from the laboratory’s general website. For example, a laboratory that offers clinical toxicology, consumer testing, or non-regulated employer testing may have separate procedures from its federally regulated program.
Are All Drug-Testing Laboratories SAMHSA-Certified?
No. Many laboratories perform drug testing without participating in the federal certification program. They may serve hospitals, clinics, courts, treatment programs, private employers, insurers, or consumers. Those services can be legitimate for their intended purpose, but they are not automatically interchangeable with federally regulated workplace testing.
The correct laboratory depends on the governing program. A private employer may have a state-law or company policy framework. A federal agency may follow federal workplace testing requirements. A transportation employer may have to follow Department of Transportation rules. Before testing, identify the rule or policy that controls the result, then verify that the laboratory and the entire testing process meet that standard.
Does a SAMHSA-Certified Lab Automatically Meet DOT Requirements?
Not by itself. A DOT drug test must follow DOT rules, including requirements for the employer, collector, specimen process, laboratory, medical review officer, forms, privacy, and reporting. A laboratory’s certification is an important part of the process, but it does not make an otherwise noncompliant test a DOT-compliant test.
Employers and service agents should use the official DOT Office of Drug and Alcohol Policy and Compliance resources for transportation-specific requirements. Confirm the current rule, guidance, and program obligations before implementing or evaluating a DOT test. If there is a conflict between a vendor’s sales explanation and the governing DOT materials, pause the process and obtain qualified compliance advice.
What Is the Difference Between the Laboratory and the Collection Site?
The collection site is the location where a trained collector receives the specimen from the donor and completes the collection process. The laboratory is the facility that analyzes the specimen. These may be operated by different organizations and may be in different states.
A collection site can be convenient and professionally operated without being a laboratory. Conversely, a certified laboratory may not accept walk-in collections. Ask the provider to identify each participant in the chain:
- The employer or program administrator
- The ordering or scheduling service
- The collection site and collector
- The laboratory performing the analysis
- The medical review officer, when required
- The employer or authorized recipient of the result
Clear identification reduces the risk that an employer will verify the wrong business or assume that a collection site’s credentials establish laboratory certification.
What Does a Medical Review Officer Do?
A medical review officer, commonly called an MRO, is a licensed physician who reviews certain laboratory results and evaluates relevant medical information. The MRO process is separate from the laboratory’s analytical work. A laboratory may report a laboratory finding, while the MRO determines whether additional information or a medical explanation must be considered under the applicable program.
Employers should not ask laboratory staff to interpret a result as a medical or employment determination. The correct review and reporting path depends on the test program. For DOT testing, follow the current DOT requirements and use qualified service agents.
How Should an Employer Verify a Vendor?
Request the vendor’s legal business name, the name and location of the laboratory that will analyze specimens, and an explanation of which party performs each step. Then compare the laboratory information with the current SAMHSA list.
Useful questions include:
- Which laboratory will perform the analysis?
- Is that laboratory currently listed by SAMHSA?
- Under what program will the testing be performed?
- Who is the collection site and who employs the collector?
- Who is the MRO, if an MRO review is required?
- How are specimens sealed, transferred, stored, and tracked?
- Which records will the employer receive?
- What happens if the specimen is rejected, canceled, or requires further review?
Put the answers in the service agreement or implementation file. A vendor that refuses to identify the analyzing laboratory, gives inconsistent names, or promises a result outside the governing process should receive additional scrutiny.
What Should You Ask About Pricing?
There is no single universal price for a workplace drug test. Total charges can vary by panel, specimen type, collection location, travel, account setup, medical review, confirmation testing, compliance administration, and expedited services. Ask for an itemized quote rather than relying on a low advertised starting price.
Typical market pricing may be presented as a range, but the applicable amount depends on location and service design. Confirm locally before budgeting or comparing vendors. Ask whether the quoted amount includes collection, laboratory analysis, MRO review, reporting, cancellations, recollections, and any required follow-up. Do not assume that the price of a laboratory analysis is the total price paid by the employer or donor.
Can You Choose Any Specimen Type?
No. The permitted specimen type depends on the applicable testing authority, current rules, employer policy, and laboratory capability. A vendor may offer urine, oral fluid, hair, blood, or other testing for different purposes, but that does not mean every option is authorized for every workplace program.
For a federally regulated or DOT test, confirm the currently authorized specimen and procedure through the applicable official requirements before ordering. Do not substitute a convenient test for the test required by the governing program. The DOT policy and compliance resources should be reviewed for transportation testing questions.
How Do Chain-of-Custody Procedures Affect the Result?
Chain of custody documents the specimen’s identity, handling, transfers, security, and receipt. It is intended to show that the specimen tested is the specimen collected and that unauthorized access or unexplained handling did not occur.
Errors can occur when identifiers do not match, seals are missing or damaged, forms are incomplete, or a specimen is transported outside the required process. A laboratory may reject a specimen or report a problem that requires action. Employers should use the approved forms and procedures for the applicable program and should not create informal shortcuts.
When a problem occurs, preserve the records and ask the MRO, program administrator, or qualified compliance professional what the governing procedure requires. Avoid making a disciplinary decision based only on an informal vendor message.
How Should Employees Handle Questions About a Test?
Employees should ask the employer or designated program contact which policy applies, where the specimen will be collected, and how results are reviewed. They should keep copies of notices, instructions, receipts, and communications. If a medical explanation may be relevant, the employee should respond promptly to the MRO using the contact information supplied through the official process.
Employees should not attempt to contact a laboratory to negotiate or reinterpret a result. Laboratory personnel generally follow analytical and reporting procedures. Questions about medical explanations, review, and next steps belong with the MRO or authorized program contact.
What Records Should Employers Keep?
Recordkeeping requirements depend on the applicable program. At a minimum, employers should maintain a documented verification of the laboratory selected, the policy or authority used, vendor credentials, contracts, collection instructions, result reports, and relevant communications. Access should be limited to authorized personnel, and records should be retained for the period required by the governing rule.
For transportation employers, confirm retention and confidentiality requirements in current DOT materials. Do not place sensitive test information in ordinary personnel files unless the applicable process permits it. A written access policy helps protect privacy and supports consistent handling.
How Often Should You Recheck the Certified Lab List?
Recheck the official SAMHSA list before onboarding a laboratory and whenever a vendor changes its analyzing facility, ownership, address, or service model. Annual verification is a practical internal control, but it may not be enough when a compliance issue is time-sensitive or a certification status has been questioned.
Use the live SAMHSA list for the current verification. Record the date checked, the listed laboratory name, the location, and the person who completed the review. Also confirm current transportation requirements through the DOT Office of Drug and Alcohol Policy and Compliance when the testing program involves DOT-regulated employees.
What Is the Safest Way to Select a SAMHSA-Certified Lab?
Begin with the governing program, not with a vendor advertisement. Identify the required specimen, forms, collector standards, laboratory certification, MRO process, reporting method, confidentiality controls, and retention rules. Then verify the actual analyzing laboratory on the current SAMHSA list and confirm any program-specific requirements through the appropriate official source.
Finally, confirm practical details locally, including collection availability, turnaround expectations, accessibility, account procedures, total pricing, and after-hours support. Certification is essential, but a compliant testing program also depends on trained people, accurate paperwork, secure handling, appropriate review, and current rules. When the stakes are high, have employment counsel, a qualified MRO, or a drug-testing compliance specialist review the process before implementation.