I thought that the ADA and CODA had more power, thanks for the information. So I dug a little bit into Colorado because I am interested in how this all works. According to the laws, so far as I can tell, they say:
The board may take disciplinary action against an applicant or licensee in accordance with section 12-35-129.1 for any of the following causes:
(d) Conviction of a violation of a federal or state law regulating the possession, distribution, or use of a controlled substance, as defined in section 18-18-102 (5), C.R.S., and, in determining if a license should be denied, revoked, or suspended or if the licensee should be placed on probation, the board shall be governed by section 24-5-101, C.R.S.;
(e) Habitually abusing or excessively using alcohol, a habit-forming drug, or a controlled substance, as defined in section 18-18-102 (5), C.R.S.;
(f) Misusing a drug or controlled substance, as defined in section 18-18-102 (5), C.R.S.;
18-18-102 includes marijuana as a controlled substance unless there is an updated one that I can't find.
So again I don't see anyone showing up to your office demanding that you take a drug test. But if a patient feels wronged or feels that you didn't provide adequet care they could report you. Because marijuana stays in your system for so long I don't know if they would just assume that you were practicing while under the influence. This whole thing seems kind of muddy on how it would work.