PAs must be registered with the Board of Medical Examiners to practice in Colorado. PAs must have a supervising physician at the time the application is submitted. Applications and copies of the Rules and Regulations may be obtained by writing: Colorado State Board of Medical Examiners 1560 Broadway, Suite 1300 Denver, CO 80202 (303) 894-7690 www.dora.state.co.us/medical Colorado DEA Registration You may not prescribe for controlled substances without a DEA number. Information for DEA registration may be obtained by calling or writing to: Drug Enforcement Agency 115 Inverness Drive, East Englewood, CO 80112 (303) 705-7323 Betty Garcia