Can dr. be held liable for a medical assistants actions.

I am very sorry to hear about your situation. I assume you are referring to a physician's assistant, or other subordinate employee of a physician. The answer to your question is clearly "Yes," especially if they have the ability to prescribe on the physician's behalf.

The Texas Occupational Code, in the Physician Assistant Licensing Act, provides as follows:

Sec. 204.205. REQUIREMENTS FOR SUPERVISING PHYSICIAN. A supervising physician must:

(1) hold an unrestricted and active license as a physician in this state;
(2) notify the medical board of the physician's intent to supervise a physician assistant;
(3) submit to the medical board a statement that the physician will:
(A) supervise the physician assistant according to medical board rule; and
(B) retain professional and legal responsibility for the care provided by the
physician assistant; and
(4) receive approval from the medical board to supervise the physician assistant.

* * *
Sec. 204.207. ASSUMPTION OF PROFESSIONAL LIABILITY.
(a) Each supervising physician retains legal responsibility for a physician assistant's patient care activities, including the provision of care and treatment to a patient in a health care facility.
(b) If a physician assistant is employed by an entity, including a health care facility, the entity shares the legal responsibility for the physician assistant's acts or omissions with the physician assistant's supervising physician.

I hope this answer's your question.

DISCLAIMER: Please know that this answer is being provided to you in response to the limited information contained in your submission and should be considered for informational and/or educational purposes only. This response does not establish any attorney client privilege or relationship between you and me, as a responding attorney, and my post certainly does not attempt to counsel you on any of the pertinent legal facts and/or implications concerning your issue. To fully investigate and determine your legal rights, should you so choose, I recommend that you promptly consult with an attorney of your choosing as time may be of the essence.