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U.S. Employers: SAMHSA Cutoffs and a 6 Step Audit Proof Checklist

by Stephanie

SAMHSA and HHS set the official federal cutoff concentrations that laboratories and employers use to interpret drug test results, and these figures live in the Federal Register and the Mandatory Guidelines. For urine, common examples include THC at 50 ng/mL initial and 15 ng/mL confirmatory, cocaine at 150/100 ng/mL, and amphetamines at 500/250 ng/mL. Oral fluid THC runs lower, at 4 ng/mL initial and 2 ng/mL confirmatory. Always verify current values against the official tables before building a policy.

TL;DR:

  • Fentanyl and norfentanyl cutoffs are now set at around 1 ng/mL due to variability in lab measurements and concerns about cross-reactivity.
  • Labs must undergo regular certification updates, and employers should verify current certification, validation data, and cross-reactivity before contracting.
  • Urine cutoffs for THC are 50 ng/mL initial and 15 ng/mL confirmatory, while oral fluid THC cutoffs are 4 ng/mL initial and 2 ng/mL confirmatory.
  • Confirmatory testing is required for any result at or above initial cutoffs, with screening stopping if below initial thresholds, ensuring accurate positive identification.
  • Updates to specimen collection forms and chain-of-custody rules in 2026 require employers to confirm the collection device and form version in use before audits.
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Table of Contents

Urine and oral fluid cutoff tables you can reference

Employers drafting or auditing a drug testing policy need a quick, accurate reference for the cutoffs labs actually use. The tables below reflect the current Mandatory Guidelines for urine testing under 49 CFR 40.85 and the oral fluid cutoffs published alongside them in the 2025 Federal Register notice. Confirm the current panel with your lab before relying on any single source, since HHS revisits these figures periodically.

Urine cutoffs come from the UrMG. Oral fluid figures come from the OFMG, and both sets are reissued or amended through annual Federal Register notices, so the fentanyl values and a handful of opioid thresholds have moved in recent cycles.

What separates initial screening from confirmatory testing

A result below the initial cutoff is reported negative and the process stops there. A result at or above the initial cutoff triggers a second, more specific confirmatory test, typically gas chromatography or liquid chromatography paired with mass spectrometry.

  • Initial cutoff: the screening threshold an immunoassay uses to flag a sample for further testing.
  • Confirmatory cutoff: the threshold a definitive method must meet before a lab reports “confirmed positive.”
  • Alternate technology rule: for THCA and benzoylecgonine, when an initial test method has specificity comparable to the confirmatory method, the lab may apply the confirmatory cutoff at the initial stage, skipping a redundant screen.

Only a confirmed positive gets reported to the Medical Review Officer as positive. Everything else is negative, regardless of what a rapid screen might have flagged.

How specimen type changes the numbers and the collection process is covered in detail in the Council for the Advancement of Nursing Science blog, which offers practical guidance on specimen collection and interpreting oral fluid results.

Urine and oral fluid are not interchangeable, and their cutoffs reflect that. Urine concentrates metabolites over hours, so its cutoffs sit in the hundreds or thousands of nanograms per milliliter for most analytes. Oral fluid reflects more recent exposure and carries much lower cutoffs, often single digits for THC.

  • Oral fluid collection devices use a buffer solution that dilutes the sample, so a device’s limit of quantitation matters as much as the published cutoff.
  • A “neat” oral fluid cutoff and a buffered-device cutoff are not the same number in practice, which is why lab-reported results should state the method used.
  • The 2026 Federal Custody and Control Form guidance updates chain-of-custody documentation for both specimen types and sets limited transition rules for older forms.

Pro Tip: Ask your collection site which CCF version it currently uses and confirm it matches the 2026 federal form before your next audit cycle.

Why fentanyl cutoffs changed and what the annual FRN process means for you

The January 2025 Federal Register notice finalized fentanyl and norfentanyl as authorized analytes after lab data showed wide variation in urine concentrations and consistently higher norfentanyl levels. Public comments gathered during rulemaking, summarized in SAMHSA’s comment review, showed labs reporting initial cutoffs proposed in a range near 0.5 to 2 ng/mL, with concerns about immunoassay cross-reactivity to norfentanyl. HHS set cutoffs that assays could realistically meet. SAMHSA now revisits the authorized panel annually through the FRN process, so employers should treat the current table as a point in time, not a fixed standard, and check for updates each year.

What an MRO checks before reporting a result

A Medical Review Officer reviews every confirmed positive before it reaches the employer, checking for legitimate medical explanations such as a valid prescription. For opiates specifically, the MRO weighs dose, timing, and prescription records against the confirmed concentration.

Specimen validity testing adds another layer: pH, creatinine, and specific gravity each have decision points that flag a dilute, substituted, or adulterated sample. The MRO guidance manual updates note recent changes, including adjustments to certain opioid confirmatory cutoffs. Employers should require a written MRO report distinguishing a verified positive from a refusal to test, since the two carry different disciplinary consequences.

MRO review and specimen validity pathway

Where HHS-certified labs fit into your compliance picture

HHS certification is not a one-time badge. Laboratories undergo recurring performance testing rounds and on-site inspections, and HHS publishes an updated list of certified labs monthly. Our guide to SAMHSA lab certification walks through how to confirm a lab’s current status before signing a contract.

When vetting a lab or Instrumented Initial Test Facility, request:

  • A current certification letter, not a logo on a website.
  • Method validation data, particularly for low-ng/mL analytes like fentanyl.
  • Cross-reactivity data for immunoassay kits used in initial screening.
  • Documented quality control performance for the specific panel you need.

Our overview of certified labs and compliance covers why this documentation matters when an audit or a legal challenge arises.

What a cutoff can and can’t tell you about use

SAMHSA cutoffs are built to detect use consistent with misuse and to support deterrence, not to mirror clinical monitoring. A clinical primary care testing guide notes that treatment settings often use cutoffs far below federal workplace thresholds, since the goal there is adherence monitoring rather than deterrence.

Detection windows vary by drug, dose, and individual metabolism, but general ballparks hold: THC can be detected in urine for several days after occasional use and longer with frequent use, while oral fluid windows run shorter, often a day or two. Cocaine and amphetamines clear faster in both specimens than THC does. A concentration above a cutoff confirms exposure, not impairment. No cutoff tells you whether someone was impaired at the moment of the test.

A practical checklist before you update your drug testing policy

  1. Confirm your lab’s current HHS certification status directly, not through a vendor claim.
  2. Require the current Federal CCF for any federally regulated or safety-sensitive program.
  3. Specify both initial and confirmatory cutoffs in your lab services contract, by analyte.
  4. Request validation and cross-reactivity data for any low-ng/mL assay, especially fentanyl.
  5. Document your MRO’s verification process in writing, including specimen validity criteria.
  6. Update policy language to define refusal-to-test and specimen validity consequences clearly.

Pro Tip: Keep a dated folder of lab certification letters and Federal Register references so you can produce them instantly during an audit.

Our breakdown of emerging drug panels covers how to anticipate the next round of FRN changes before they catch your program off guard.

Balancing sensitivity and lab capability in practice

Vendors sometimes push back hard on very low cutoffs, fentanyl especially, citing assay limits. Insist on real validation and cross-reactivity data before accepting that pushback. Coordinate HR, occupational health, and your MRO early when adding a new analyte to your panel.

— Alan

How CountryWideTesting supports compliant federal and employer testing

Getting the cutoffs right on paper is one step. Getting a lab that can actually hit those numbers, document them, and stand behind the result is the part most policies miss. Working with laboratories that meet recognized standards allows employers a direct path to federally compliant testing without chasing certification paperwork themselves.

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Through our Lab Testing Services, clients get access to HHS and SAMHSA-certified labs, custom panel configurations, and coordination support for MRO review. We also support employer and federal drug testing programs directly through our site, including mail-in confirmation testing like the Phamatech Zero Tolerance SAMHSA Seven for organizations that need a documented, compliant confirmation result. Visit the lab testing services page to see current turnaround details and request a custom quote for your program.

This article is general information, not a substitute for advice from a qualified doctor. Consult a qualified healthcare professional about your own circumstances before acting on anything here.

How CountryWideTesting supports compliant federal and employer testing — overview diagram

FAQ

What are the cutoff levels for drug tests in Texas probation?

Probation drug testing cutoffs vary by jurisdiction and the specific court or supervising agency, so Texas probation programs do not necessarily follow the federal SAMHSA/HHS workplace cutoffs. Check with the supervising court or probation office directly, since many contract with private labs that set their own thresholds.

What are the cutoff levels for the 7-panel drug test at Walgreens?

Retail pharmacy test kits typically follow manufacturer-set cutoffs rather than a single published federal standard, and these can differ from the SAMHSA/HHS workplace cutoffs described above. Check the specific product’s package insert or manufacturer documentation for its exact initial cutoff values.

What are the cutoff levels for drug testing?

Federal workplace cutoffs for urine include THC at 50 ng/mL initial and 15 ng/mL confirmatory, cocaine at 150/100 ng/mL, and amphetamines at 500/250 ng/mL, as set out in 49 CFR 40.85. Oral fluid cutoffs run lower, with THC at 4 ng/mL initial and 2 ng/mL confirmatory under the current Mandatory Guidelines.

What are the cutoff levels for nail drug tests?

SAMHSA and HHS have not published Mandatory Guidelines cutoffs for nail specimens, since federal workplace programs currently authorize only urine and oral fluid. Any nail testing program available on the market uses a private lab’s own validated thresholds rather than a federal standard.

Sources

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