adequate substitute for a warrant." New York v. Burger, 482 U.S. 691, 702-03, 107 S.Ct. 2636, 96 L.Ed.2d 601 (1987) (quoting Donovan v. Dewey, 452 U.S. 594, 603, 101 S.Ct. 2534, 69 L.Ed.2d 262 (1981) ).
Cotropia did not resolve whether the Board's use of administrative subpoenas satisfied the Burger criteria because the issue was not raised until oral argument. Cotropia, 721 F. App'x at 360 & n.6. As a result, the panel's holding was expressly limited to concluding that the Board's demand for immediate compliance with the subpoena did not satisfy the general administrative exception to the warrant requirement. The argument has timely been raised here, though. Thus, we must discuss whether the Burger exception permitted the Board's administrative subpoena and whether that law was clearly established at the time of its execution.
To categorize industries under Burger, courts consider the history of warrantless searches in the industry, how extensive the regulatory scheme is, whether other states have similar schemes, and whether the industry would pose a threat to the public welfare if left unregulated. See Burger, 482 U.S. at 704, 107 S.Ct. 2636 ; Patel, 135 S. Ct. at 2454. The defendants characterize the relevant industry in two different ways. We evaluate first whether the practice of medicine is a closely regulated industry and then whether the practice of prescribing controlled substances is closely regulated.
Acknowledging that the medical profession is subject to close oversight, the district court emphasized the absence of a history of warrantless inspections to conclude that the medical profession was not a closely regulated industry. Important to its conclusion was the confidential nature of the doctor-patient relationship: "It strains credibility to suggest that doctors and their patients have no reasonable expectation of privacy." On appeal, the defendants all but concede that there is not a lengthy history of warrantless searches. They instead emphasize the extensive regulatory scheme governing the practice of medicine and the risk that the industry could pose to the public welfare.
There is no doubt that the medical profession is extensively regulated and has licensure requirements. Satisfying the Burger doctrine requires more. The Supreme Court instructs "that the doctrine is essentially defined by 'the pervasiveness and regularity of the federal regulation' and the effect of such regulation upon an owner's expectation of privacy." Burger, 482 U.S. at 701, 107 S.Ct. 2636 (quoting Dewey, 452 U.S. at 605-06, 101 S.Ct. 2534 ). Another key factor is "the duration of a particular regulatory scheme." Id. (quoting Dewey, 452 U.S. at 606, 101 S.Ct. 2534 ).
The Board cites several laws or regulations governing the behavior of doctors. Outside of citing Texas's licensure requirement for physicians, the regulations the Board cites do not apply to the entire medical profession. Instead, they target the practice of prescribing controlled substances. As examples, the Board states that doctors must register with the DEA to prescribe controlled substances, TEX. HEALTH & SAFETY CODE § 481.061 ; that prescriptions of controlled substances are monitored by several law enforcement agencies, id. §§ 481.067, 481.075, 481.076; and that pain management clinics must register as such, which allows the Board to inspect them from time to time, TEX. OCC. CODE §§ 168.101, 168.052 ; 37 Tex. Reg. 10079, 10079-80 (2012), adopted 38 Tex. Reg. 1876, 1876-77 (2013), amended 39 Tex. Reg. 297, 297-98 (2014) (former 22 TEX. ADMIN. CODE § 195.2 ); 35 Tex. Reg. 1924, 1925-26 (2010), adopted 35 Tex. Reg. 3281, 3281-82 (2010), amended 43 Tex.