On November 17, 2025, the Drug Enforcement Administration (DEA or Government) issued an Order to Show Cause (OSC) to Gene M. Koop, D.D.S., of Edmond, Oklahoma (Registrant). Request for Final Agency Action (RFAA), Exhibit (RFAAX) 2, at 1, 3. The OSC proposed the revocation of Registrant's Certificate of Registration No. BK1369633, alleging that Registrant is “currently without authority to prescribe, administer, dispense, or otherwise handle controlled substances in the State of Oklahoma, the state in which [he is] registered with DEA.” Id. at 2 (citing 21 U.S.C. 824(a)(3)).

The OSC notified Registrant of his right to file a written request for hearing, and that if he failed to file such a request, he would be deemed to have waived his right to a hearing and be in default. Id. at 2-3 (citing 21 CFR 1301.43). Here, Registrant did not request a hearing, and the Agency finds him to be in default. RFAA, at 2-3.^[1] “A default, unless excused, shall be deemed to constitute a waiver of the registrant's/applicant's right to a hearing and an admission of the factual allegations of the [OSC].” 21 CFR 1301.43(e).

Further, “[i]n the event that a registrant . . . is deemed to be in default . . . DEA may then file a request for final agency action with the Administrator, along with a record to support its request. In such circumstances, the Administrator may enter a default final order pursuant to [21 CFR] 1316.67.” Id. at 1301.43(f)(1). Here, the Government has requested final agency action based on Registrant's default pursuant to 21 CFR 1301.43(c), (f), 1301.46. RFAA, at 1; see also21 CFR 1316.67.

Findings of Fact

The Agency finds that, in light of Registrant's default, the factual allegations in the OSC are deemed admitted. According to the OSC, on December 31, 2023, Registrant's Oklahoma dentistry license expired by its own terms. RFAAX 2, at 2. Further, on October 31, 2024, Registrant's Oklahoma Bureau of Narcotics and Dangerous Drug (OBNDD) license expired by its own terms. Id. According to Oklahoma online records, of which the Agency takes official notice,^[2] Registrant's OBNDD registration is inactive. OBNDD, Registrant Search, https://obnddc.us.thentiacloud.net/​webs/​obnddc/​register (last visited date of signature of this Order).^[3] Accordingly, the Agency finds that Registrant is not licensed to practice dentistry nor to handle controlled substances in Oklahoma, the state in which he is registered with DEA.^[4]

Discussion

Pursuant to 21 U.S.C. 824(a)(3), the Attorney General is authorized to suspend or revoke a registration issued under 21 U.S.C. 823 “upon a finding that the registrant . . . has had his State license or registration suspended . . . [or] revoked . . . by competent State authority and is no longer authorized by State law to engage in the . . . dispensing of controlled substances.” With respect to a practitioner, DEA has also long held that the possession of authority to dispense controlled substances under the laws of the state in which a practitioner engages in professional practice is a fundamental condition for obtaining and maintaining a practitioner's registration. Gonzales v. Oregon, 546 U.S. 243, 270 (2006). (“The Attorney General can register a physician to dispense controlled substances `if the applicant is authorized to dispense . . . controlled substances under the laws of the State in which he practices.' . . . The very definition of a `practitioner' eligible to prescribe includes physicians `licensed, registered, or otherwise permitted, by the United States or the jurisdiction in which he practices' to dispense controlled substances. § 802(21).”). The Agency has applied these principles consistently. See, e.g., Ashley Vermillion, N.P.,91 FR 35270, (2026); Henry-Norbert O. Ndekwe, M.D.,90 FR 15990 (2025); Lawrence Rudolph, D.M.D.,89 FR 79310 (2024).^[5]

Pursuant to Oklahoma's Uniform Controlled Dangerous Substances Act, “[e]very person who manufactures, distributes, dispenses, prescribes, administers or uses for scientific purposes any controlled dangerous substance within or into this state . . . shall obtain a registration issued by the Director of the [OBNDD], in accordance with rules promulgated by the Director.” Okla. Stat. tit. 63, § 2-302(A) (2026).^[6]

Here, the undisputed evidence in the record is that Registrant currently lacks authority to handle controlled substances in Oklahoma because his OBNDD registration is inactive. As discussed above, a person must hold a valid OBNDD registration to dispense a controlled substance in Oklahoma, subject to limited exceptions not applicable here. Thus, because Registrant lacks authority to handle controlled substances in Oklahoma, Registrant is not eligible to maintain a DEA registration. Accordingly, the Agency will order that Registrant's DEA registration be revoked.

Order

Pursuant to 28 CFR 0.100(b) and the authority vested in me by 21 U.S.C. 824(a), I hereby revoke DEA Certificate of Registration No. BK1369633 issued to Gene M. Koop, D.D.S. Further, pursuant to 28 CFR 0.100(b) and the authority vested in me by 21 U.S.C. 823(g)(1), I hereby deny any pending applications of Gene M. Koop, D.D.S., to renew or modify this registration, as well as any other pending application of Gene M. Koop, D.D.S., for additional registration in Oklahoma. This Order is effective August 27, 2026.

Signing Authority

This document of the Drug Enforcement Administration was signed on July 21, 2026, by DEA Administrator Terrance C. Cole. That document with the original signature and date is maintained by DEA. For administrative purposes only, and in compliance with requirements of the Office of the Federal Register, the undersigned DEA Federal Register Liaison Officer has been authorized to sign and submit the document in electronic format for publication, as an official document of DEA. This administrative process in no way alters the legal effect of this document upon publication in the Federal Register .