Said department may refuse to grant a license to practice naturopathy or may take any of the actions set forth in section 19a-17 for any of the following reasons: The employment of fraud or material deception in obtaining a license, habitual intemperance in the use of ardent spirits, narcotics or stimulants to such an extent as to incapacitate the user for the performance of professional duties, violations of the provisions of this chapter or regulations adopted hereunder, engaging in fraud or material deception in the course of professional services or activities, physical or mental illness, emotional disorder or loss of motor skill, including, but not limited to, deterioration through the aging process, illegal, incompetent or negligent conduct in his practice, failure to maintain professional liability insurance or other indemnity against liability for professional malpractice as provided in subsection (a) of section 20-39a, failure to provide information to the Department of Public Health required to complete a health care provider profile, as set forth in section 20-13j or failure to comply with the provisions of section 20-42a. Any applicant for a license to practice naturopathy or any practitioner against whom any of the foregoing grounds for refusing a license or action under said section 19a-17 are presented to said board shall be furnished with a copy of the complaint and shall have a hearing before said board in accordance with the regulations adopted by the Commissioner of Public Health. The Commissioner of Public Health may order a license holder to submit to a reasonable physical or mental examination if his physical or mental capacity to practice safely is the subject of an investigation. Said commissioner may petition the superior court for the judicial district of Hartford to enforce such order or any action taken pursuant to section 19a-17.