A medical practice act is a state law that governs how medicine can be practiced within that state’s borders. Every U.S. state and territory has one, and together these laws create the legal framework that determines who can practice medicine, what counts as practicing medicine, and what happens to those who practice without authorization or violate professional standards. The medical practice act is the reason your doctor needs a license and the mechanism through which that license can be taken away.
What a Medical Practice Act Covers
At its core, a medical practice act does three things: it defines the practice of medicine, it establishes a state medical board to oversee that practice, and it lays out the rules for licensing, supervision, and discipline. The Federation of State Medical Boards (FSMB), which publishes model legislation for states to use as a template, frames the act’s purpose around a central idea: the practice of medicine is a privilege granted by the people through their elected representatives, not an inherent right. The law exists to protect the public from incompetent, fraudulent, or dangerous medical care.
Each state writes its own version, so the specifics vary. But most medical practice acts share the same basic architecture, built around the same categories of regulation.
How “Practice of Medicine” Is Defined
One of the most important things a medical practice act does is spell out exactly what counts as practicing medicine. This definition has legal teeth because anyone who performs these activities without a license can face criminal charges. The FSMB’s model legislation defines the practice of medicine broadly to include:
- Diagnosing or treating any disease, illness, pain, wound, fracture, or abnormal physical or mental condition, including managing pregnancy and childbirth
- Prescribing or ordering any drug or medicine for another person
- Performing surgery of any kind
- Rendering medical opinions about a patient’s diagnosis or treatment, even remotely through electronic communication
- Making determinations of medical necessity or decisions that affect a patient’s diagnosis or treatment
- Using professional titles like “Doctor,” “Physician,” “M.D.,” or “D.O.” in connection with preventing, diagnosing, or treating human disease
That last point matters more than it might seem. Simply advertising yourself as a physician or holding yourself out to the public as someone authorized to practice medicine falls under the legal definition, even if you never touch a patient.
The State Medical Board’s Role
Every medical practice act creates or authorizes a state medical board to carry out the law’s requirements. In Texas, for example, the statute explicitly designates the Texas Medical Board as an executive branch agency with the power to regulate the practice of medicine. These boards act in the state’s interest by licensing physicians, investigating complaints, and taking disciplinary action when necessary.
State medical boards are typically composed of physicians and public members appointed by the governor or legislature. They hold regular meetings where they review license applications and hear disciplinary cases. Boards can conduct parts of their deliberations in closed executive sessions after hearing evidence and arguments in open meetings, particularly when discussing individual license applications or disciplinary matters.
Licensing Requirements for Physicians
The licensing process is one of the most detailed sections of any medical practice act. While each state sets its own requirements, the baseline is consistent nationwide. To obtain a full, unrestricted medical license, a physician must meet several criteria.
First, they need a medical degree. All states require either an M.D. (Doctor of Medicine) or D.O. (Doctor of Osteopathic Medicine) degree. Graduates of international medical schools can present the equivalent of an M.D. degree, such as an MBBS. Second, they must complete postgraduate training. Every state requires at least one year of residency, and some require two or three years before granting a full license.
Third, candidates must pass a comprehensive national licensing exam: either the United States Medical Licensing Examination (USMLE) for M.D. graduates or the Comprehensive Osteopathic Medical Licensing Examination (COMLEX-USA) for D.O. graduates. Finally, all state boards evaluate what’s called “fitness to practice,” which covers physical health, mental health, and moral character. Applications typically ask about work history, any conditions that might impair the ability to practice safely, and criminal background. Many boards run criminal background checks as part of the process.
When a physician submits a license application, board staff verify every credential: the medical degree, postgraduate training, exam results, and disciplinary history. The FSMB maintains a national disciplinary data bank that boards query to check whether a physician has faced action in another state.
Supervision of Other Providers
Medical practice acts also govern how physicians supervise other healthcare providers, particularly physician assistants (PAs). These rules vary by state but typically require a formal practice agreement between the supervising physician and the PA. In California, for example, that agreement must specify the types of medical services the PA is authorized to perform, policies for ensuring adequate supervision, methods for evaluating the PA’s competency, and rules about prescribing medications.
A supervising physician doesn’t need to be physically present while the PA sees patients, but must be reachable by phone or other electronic communication during patient encounters. California law caps supervision at eight PAs per physician under normal circumstances, with exceptions only during declared emergencies. PAs cannot practice independently; every PA must work under a licensed physician who takes responsibility for the medical services provided. Certain procedures are off-limits to PAs regardless of supervision, including eye refraction testing, fitting contact lenses, and dental work.
Before authorizing a PA to perform any procedure, the supervising physician is responsible for evaluating that PA’s education, training, experience, and ability to carry it out safely.
Disciplinary Actions and Grounds for Discipline
The enforcement provisions of a medical practice act give state boards the authority to investigate complaints against physicians and impose discipline ranging from a formal reprimand to full license revocation. The most common grounds for disciplinary action fall into three broad categories: substance abuse (drug or alcohol problems), criminal convictions, and unethical conduct.
That “unethical conduct” category is intentionally broad. Physicians have been disciplined for driving while intoxicated, drug possession, sexual misconduct, and other behavior that state boards consider damaging to the profession’s integrity. Courts have affirmed that states can revoke a professional license based on a prior criminal conviction when that conviction is reasonable evidence of insufficient character to practice.
Cases involving clinical errors, such as gross negligence or incompetence, require more extensive investigation, similar to what happens in a civil malpractice lawsuit. These cases involve reviewing medical records, consulting expert opinions, and evaluating whether the physician’s care fell below accepted standards.
Penalties for Practicing Without a License
Medical practice acts impose serious penalties on people who practice medicine without a valid license. In Texas, practicing medicine without authorization is a third-degree felony, and each day the violation continues counts as a separate offense. If the unlicensed practice causes physical or psychological harm to a patient, it remains a third-degree felony. If it causes financial harm, it’s classified as a state jail felony.
Civil penalties apply as well. The Texas statute authorizes the state attorney general to pursue fines of $1,000 for each violation, with each day of continued violation counted separately. These penalties exist on top of any criminal charges, meaning someone practicing without a license could face both prison time and substantial financial penalties simultaneously.
Interstate Licensure
Because each state has its own medical practice act, physicians who want to practice in multiple states have traditionally needed to apply for a separate license in each one. The Interstate Medical Licensure Compact (IMLC) was created to address this problem. More than 40 states and territories now participate in the compact, which provides an expedited pathway for qualified physicians to obtain licenses in member states without repeating the full application process from scratch.
The compact doesn’t replace individual state licenses or override any state’s medical practice act. It simply streamlines the verification and application process so that a physician who already holds a license in one member state can more quickly obtain licenses in others. Each state still retains full authority over the physicians practicing within its borders, including the power to investigate complaints and impose discipline under its own laws.