TL;DR
- FDA debarment permanently or temporarily bars a person or company from any role in the drug-approval process; a Warning Letter cites violations and demands correction, it doesn't bar anyone from the industry (FDA Debarment List (Drug Product Applications); FDA: Warning Letters).
- Debarment under Section 306 of the FD&C Act (21 U.S.C. § 335a) requires an actual felony conviction. A Warning Letter requires no conviction and no court involvement, just an FDA finding of a violation.
- Mandatory debarment of an individual is permanent. Mandatory debarment of a corporation runs 1 to 10 years, and becomes permanent if the firm debars again within that window. Permissive, discretionary debarment tops out at 5 years (21 U.S.C. § 335a(c)).
- FDA's public Debarment List and its Warning Letter database are two entirely separate records. Appearing on one doesn't put a name on the other.
- FDA permanently debarred clinical investigator Dr. Matthew Teltser effective February 6, 2026, after he pleaded guilty to lying to an FDA inspector about attending clinical-trial visits, a felony false-statement conviction, not a CGMP citation (Federal Register, Matthew Teltser: Final Debarment Order, 91 FR 5495).
What's the Difference Between FDA Debarment and a Warning Letter?
Ask which one is worse and you're asking the wrong question. A Warning Letter and an FDA debarment order sit on different legal tracks, built for different problems. A Warning Letter is FDA's formal notice that a company's CGMP, labeling, or manufacturing practices violate the law and need fixing (FDA: Warning Letters). Debarment is a criminal-conviction consequence that bars a specific person, or company, from any role in the drug-approval process, sometimes forever (21 U.S.C. § 335a).
What Actually Triggers Debarment?
Debarment under Section 306 of the Federal Food, Drug, and Cosmetic Act, codified at 21 U.S.C. § 335a, runs on two tracks, and only one of them leaves FDA any choice.
Mandatory debarment (Section 306(a)). If the Secretary finds a corporation was convicted, after May 13, 1992, of a felony tied to developing or approving an abbreviated drug application, that company gets debarred, no discretion involved. For an individual, mandatory debarment applies to any felony conviction relating to the development, approval, or regulation of a drug product, and the debarment period is permanent (21 U.S.C. § 335a(a)-(c)). Corporate mandatory debarment runs 1 to 10 years, unless a repeat offense inside that window converts it to permanent too.
Permissive debarment (Section 306(b)). This track gives FDA discretion and covers a wider set of predicate crimes: bribery, fraud, false statements, racketeering, obstruction of an investigation, and comparable felonies or misdemeanors tied to drug regulation. Permissive debarment tops out at 5 years (21 U.S.C. § 335a(b)-(c)).
Both tracks share a requirement a Warning Letter never has: an actual criminal conviction has to exist first. FDA cannot debar on the strength of an inspection finding alone.
What Actually Triggers a Warning Letter?
No conviction required, no court involved. A Warning Letter follows an FDA inspection or comparable finding that a company's practices violate the law at a level of "regulatory significance" that may lead to enforcement action if uncorrected (FDA: Warning Letters). The company typically gets 15 working days to respond, see How long does a company have to respond to an FDA Warning Letter? Fix it convincingly, and the matter can close out entirely, see What is an FDA Warning Letter Close-Out Letter? Debarment has no comparable fast exit. Termination requires a formal petition, and FDA has up to 180 days just to rule on it (21 U.S.C. § 335a(d)).
A February 2026 Example: Debarment Without a Single CGMP Citation
On February 6, 2026, FDA permanently debarred Dr. Matthew Teltser, a physician who served as clinical investigator on two asthma drug trials at A&R Research Group LLC (Federal Register, Matthew Teltser: Final Debarment Order, 91 FR 5495, Docket No. FDA-2025-N-1956). There is no CGMP violation anywhere in the order. Dr. Teltser pleaded guilty in the U.S. District Court for the Southern District of Florida on June 10, 2025, to making a false statement under 18 U.S.C. § 1001(a)(2), after telling an FDA investigator during a January 2020 inspection that he had personally attended every subject visit in the trials. He hadn't. FDA proposed debarment by certified mail on September 2, 2025; Dr. Teltser never requested the hearing he was offered, waiving it under 21 CFR part 12, and the order became applicable that February.
A sponsor running those same trials could separately receive a Warning Letter over recordkeeping or protocol-deviation practices, a different action against a different party for a different reason. No felony conviction is required to trigger it.
Debarment vs. Warning Letter, Side by Side
| Debarment | Warning Letter | |
|---|---|---|
| Legal trigger | Felony conviction (mandatory) or qualifying felony/misdemeanor (permissive) | FDA finding of a regulatory violation, no conviction required |
| Who it targets | A specific individual or corporation | A company's facility or practices |
| Legal basis | Section 306, FD&C Act (21 U.S.C. § 335a) | FDA compliance policy, prior-notice standard |
| Duration | Individual mandatory: permanent. Corporate mandatory: 1-10 years (permanent on repeat). Permissive: up to 5 years | No fixed term, resolved by corrective action rather than a clock |
| Public listing | FDA Debarment List (Drug Product Applications) | FDA Warning Letters database |
| Response path | Formal petition; up to 180 days for FDA to rule | Response typically due in 15 working days |
Sources: 21 U.S.C. § 335a; FDA: Warning Letters.
FAQ
Does receiving a Warning Letter mean my company could be debarred next?
No. They are separate legal tracks. A Warning Letter alone, without an underlying felony conviction, cannot lead to debarment. The two only intersect if the same underlying misconduct also produces a criminal case (21 U.S.C. § 335a).
How long does an FDA debarment actually last?
Depends which track applies. An individual debarred under the mandatory track is barred permanently. A corporation debarred under the mandatory track serves 1 to 10 years, unless a second qualifying offense inside that window converts it to permanent. Permissive debarment tops out at 5 years (21 U.S.C. § 335a(c)).
Can a debarment order be terminated early?
Only through a formal petition, and not immediately. A corporation debarred under the mandatory track cannot have that debarment terminated earlier than one year after it took effect, even with a successful petition. FDA then has up to 180 days to grant or deny the application (21 U.S.C. § 335a(d)).
Related reading
- What's the difference between an FDA Untitled Letter and a Warning Letter?
- What's the Difference Between an FDA Recall and a Warning Letter?
- What's the difference between a Form 483 and an FDA Warning Letter?
- Why FDA enforcement is up nearly 60% in 2026
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Sources: 21 U.S.C. § 335a — Debarment, temporary denial of approval, and suspension, FDA Debarment List (Drug Product Applications), FDA: Warning Letters, Federal Register: Matthew Teltser, Final Debarment Order, 91 FR 5495. Byline: Andy Gaber, Founder. Published 2026-07-17.