Forensic drug testing laboratory accreditation is an outside review of a laboratory that tests specimens for drugs of abuse for non-medical purposes, such as employment screening and law enforcement; the College of American Pathologists (CAP) runs a dedicated Forensic Drug Testing Accreditation Program. This page is for laboratories seeking that accreditation, expanding their testing, or fixing their records and quality system, including labs that also work under the federal workplace testing guidelines. Integral Healthcare Solutions (IHS) drafts the custody, reporting and records procedures for forensic drug testing accreditation; your scientists own testing validity.
Last reviewed: October 2026.
What is forensic drug testing accreditation?
CAP's standards define the field: "Forensic drug testing is a laboratory specialty concerned with the testing of urine, oral fluid, hair, and other specimens for drugs of abuse and alcohol. It is performed for non-medical purposes, including employment-related screening and law enforcement" (CAP FDT Standards for Accreditation). CAP says its program "provides laboratories with confidence in the accuracy of their results" (CAP Forensic Drug Testing Accreditation Program).
The documents CAP names for the program are the Standards for Accreditation and the checklists you purchase (Forensic Drug Testing, Chemistry and Toxicology, Laboratory General, Director Assessment and All Common). The edition of the Standards we reviewed ends "Revised June 2018"; CAP's program page names no edition and refers to annually updated checklists, so confirm with CAP which edition applies. Standard III states: "The laboratory shall have policies and procedures to ensure quality laboratory testing and chain-of-custody documentation" (CAP FDT Standards).
Scope, per the program page: "screening, confirmatory testing on urine, oral fluid, hair, nails, meconium, umbilical cord, and whole blood using waived and non-waived methods for forensic and/or clinical testing." It adds: "In 2025, the Forensic Drug Testing Accreditation Program also inspects and accredits forensic toxicology laboratories that perform clinical toxicology in addition to forensic toxicology, certifying compliance for its clinical toxicology testing with the Clinical Laboratory Improvement Amendments (CLIA)" (CAP). The 2018 Standards say the program does not accredit non-forensic testing; the current program page describes the 2025 change, and this page follows the program page.
Inspections: "On-site inspections occur every two years using the CAP Accreditation Checklists to assess compliance with program requirements, in addition to an interim self-inspection required during the off-year" (CAP).
Federally regulated workplace testing runs under a second text: the HHS Mandatory Guidelines for Federal Workplace Drug Testing Programs using Urine (88 FR 70768, effective February 1, 2024) and using Oral Fluid (88 FR 70814, effective October 10, 2023), with laboratory certification through SAMHSA's National Laboratory Certification Program (NLCP). In March 2026, HHS stated that it "has made no revisions to the current drug testing panels for both urine and oral fluid and current required nomenclature for laboratory and Medical Review Officer Reports, effective July 7, 2025" (Federal Register 2026-04981).
Who needs it and what triggers it
The buyer is a laboratory running forensic drug testing services. Common triggers:
- Seeking CAP FDT accreditation for the first time, or adding clinical toxicology under the 2025 scope (CAP).
- Expanding into federally regulated testing. SAMHSA states: "In addition to the federal agencies that use HHS-certified laboratories to test specimens for their workplace drug testing programs, the Department of Transportation, the Department of Energy, and the Nuclear Regulatory Commission require the industries they regulate to use HHS-certified laboratories for their workplace drug testing programs" (SAMHSA NLCP).
- Remediating custody, records or quality-system findings before the next biennial inspection or self-inspection.
CLIA treats forensic work differently. Its rules do not apply to "Any facility or component of a facility that only performs testing for forensic purposes" or to "Laboratories certified by the Substance Abuse and Mental Health Services Administration (SAMHSA), in which drug testing is performed which meets SAMHSA guidelines and regulations. However, all other testing conducted by a SAMHSA-certified laboratory is subject to this rule" (42 CFR 493.3(b)).
How IHS helps
IHS markets a process, applied to the CAP FDT checklist set your laboratory holds:
- Gap assessment against the CAP FDT Standards and checklists.
- Questionnaires on chain of custody, qualifications, exception handling and reporting.
- Document and evidence mapping: a crosswalk from each checklist requirement to the audit evidence that shows it is met. Where the laboratory also seeks HHS certification, the same documents are mapped to the Mandatory Guidelines it operates under.
- Drafting custody, exception-handling, reporting and records procedures for your laboratory director to review and approve.
- Mock document audit before the inspection.
- Readiness support through inspection and the deficiency response.
What you supply: the checklists, your SOPs, custody forms, and your qualified scientists and medical review officers.
The limit: testing validity and result interpretation are scientific and medical-review judgments that stay with your laboratory. Collection-site operations are a separate scope. Your laboratory applies to CAP or SAMHSA and hosts every inspection; IHS does not apply on your behalf.
What to have ready
- Your purchased CAP checklists: Forensic Drug Testing, Chemistry and Toxicology, Laboratory General, Director Assessment and All Common, with editions noted.
- The edition of the CAP FDT Standards for Accreditation CAP gives you (the edition we reviewed was revised June 2018).
- Your chain-of-custody procedure and current custody forms, for Standard III's "chain-of-custody documentation" (CAP FDT Standards).
- A list of specimen types and methods, checked against CAP's scope of "urine, oral fluid, hair, nails, meconium, umbilical cord, and whole blood using waived and non-waived methods" (CAP).
- A decision on whether clinical toxicology is in scope, given CAP's 2025 change to certify that testing for CLIA compliance (CAP).
- Your exception-handling and result-reporting procedures, with recent examples.
- A plan for the "interim self-inspection required during the off-year" (CAP).
- If you serve federal, DOT, DOE or NRC testing: the Mandatory Guidelines version you operate under, and the NLCP proficiency testing and inspection schedule (SAMHSA NLCP).
- An owner for the deficiency response: CAP's process says "Respond to deficiencies within 30 days" (CAP accreditation process).
To go through the list with IHS, book the introductory call below.
How it compares
The routes below come from the sources' own pages. Which apply depends on who your clients are and what testing you run; some laboratories hold more than one.
| Route | What the sources say |
|---|---|
| CAP Forensic Drug Testing Accreditation Program | On-site inspection every two years plus an off-year self-inspection; forensic testing and, since 2025, clinical toxicology (CAP). |
| HHS certification through SAMHSA's NLCP | Used by federal agencies, and required by DOT, DOE and NRC for the industries they regulate. Certification takes "three rounds of PT and an inspection occurring concurrent with the third set of PT," another inspection three months later, quarterly maintenance PT and "every semiannual maintenance inspection" (SAMHSA NLCP). |
| CAP Laboratory Accreditation Program | The 2018 FDT Standards said non-forensic accreditation "may be obtained through the CAP Laboratory Accreditation Program (LAP) or other accreditation programs" (CAP FDT Standards); CAP's current FDT page says the program now also accredits clinical toxicology, so check which route fits your testing. See CAP laboratory accreditation. |
| No accreditation | 42 CFR 493.3(b)(1) says CLIA's rules do not apply to "any facility or component of a facility that only performs testing for forensic purposes." CAP's own definition of forensic drug testing includes employment-related screening, and we have not found where CLIA defines "forensic purposes." IHS's reading is not settled on whether a given workplace-testing line falls inside that exclusion. Confirm with your counsel or the CMS/state CLIA agency before relying on it. What your clients and contracts expect is a separate question this page does not answer. |
What it costs
CAP does not publish a fee schedule on the pages we reviewed; fees depend on scope. CAP offers a fee estimate form "to receive more information about cost and next steps to become CAP accredited" (CAP accreditation) and states: "If you purchase the checklists and apply for accreditation within six months, we will waive the application fee" (CAP accreditation process, read October 2, 2026). SAMHSA says NLCP fees "are posted on this website" (SAMHSA NLCP); we have not quoted an amount here. Verify current fees with CAP and SAMHSA. IHS scopes each engagement after a free introductory call.
What this is not
- IHS is not CAP, SAMHSA or HHS and does not grant, predict or influence an accreditation or certification decision.
- IHS does not contact, apply to or speak for your laboratory to CAP or SAMHSA. IHS drafts; your laboratory applies and hosts every inspection.
- IHS does not judge testing validity, interpret results or act as a medical review officer, and this page is not legal advice.
Frequently asked questions
What is CAP forensic drug testing accreditation?
It is the College of American Pathologists' accreditation program for laboratories that test specimens for drugs of abuse and alcohol for non-medical purposes, such as employment screening and law enforcement. CAP inspects on site every two years against its checklists, with an interim self-inspection in the off-year.
What is the difference between CAP FDT accreditation and SAMHSA/HHS certification?
CAP FDT accreditation is CAP's program, inspected against the CAP FDT Standards and checklists. HHS certification runs through SAMHSA's National Laboratory Certification Program under the Mandatory Guidelines, with three rounds of proficiency testing, an inspection with the third round, another inspection three months after certification, quarterly maintenance PT and semiannual maintenance inspections.
Which drug testing programs require an HHS-certified laboratory?
SAMHSA states that federal agencies use HHS-certified laboratories for their workplace drug testing programs, and that the Department of Transportation, the Department of Energy and the Nuclear Regulatory Commission require the industries they regulate to use HHS-certified laboratories.
Does a forensic toxicology lab need a CLIA certificate?
CLIA's rules at 42 CFR 493.3(b) do not apply to a facility or component that only performs testing for forensic purposes, or to SAMHSA-certified drug testing that meets SAMHSA guidelines. Whether your workplace-testing line counts as testing only for forensic purposes is not something this page decides. All other testing at a SAMHSA-certified laboratory is subject to CLIA, so a lab that also does clinical testing needs to look at that testing separately.
Can CAP FDT accreditation cover clinical toxicology testing too?
Yes, since 2025. CAP's program page says the Forensic Drug Testing Accreditation Program now also inspects and accredits forensic toxicology laboratories that perform clinical toxicology, certifying that testing for CLIA compliance.
Which specimen types does CAP FDT accreditation cover?
CAP lists screening and confirmatory testing on urine, oral fluid, hair, nails, meconium, umbilical cord and whole blood, using waived and non-waived methods, for forensic and/or clinical testing.
How often are CAP FDT laboratories inspected?
CAP inspects on site every two years using its Accreditation Checklists, and requires an interim self-inspection during the off-year. CAP's process asks laboratories to respond to deficiencies within 30 days.
What chain-of-custody documentation do inspectors expect?
The 2018 edition of the CAP FDT Standards that we reviewed states, in Standard III, that the laboratory shall have policies and procedures to ensure quality laboratory testing and chain-of-custody documentation. Confirm against the edition CAP currently applies. The detailed requirements sit in the checklists you purchase, which is why IHS works from your copy.
How much does forensic drug testing accreditation cost?
CAP does not publish its fees on the pages we reviewed and offers a fee estimate form; it states the application fee is waived if you buy the checklists and apply within six months. SAMHSA says NLCP fees are posted on its website. Verify current fees with CAP and SAMHSA; IHS scopes its own work after a free introductory call.
Does IHS handle collection sites or medical review?
No. Collection-site operations are a separate scope, and result interpretation stays with your scientists and medical review officers. IHS drafts laboratory custody, exception, reporting and records procedures for your director to approve.