Colorado Revised Statutes Title 12. Professions and Occupations § 12-240-110. Qualifications for licensure

(a) The passing by the applicant of an examination approved by the board;

(b) The applicant's passage of examinations conducted by the National Board of Medical Examiners, the National Board of Osteopathic Medical Examiners, the Federation of State Medical Boards, or any successor to those organizations, as approved by the board;

(c) Any combination of the examinations provided in subsections (1)(a) and (1)(b) of this section approved by the board;

(d) Endorsement, if the applicant for licensure by endorsement satisfies the requirements of the occupational credential portability program.

(a) Is at least twenty-one years of age;

(b) Is a graduate of an approved medical college; and

(c) Has completed either an approved internship of at least one year or at least one year of postgraduate training approved by the board.