In the United States, the professionals who can legally write a prescription include physicians (MDs and DOs), dentists, podiatrists, optometrists, veterinarians, nurse practitioners, physician assistants, nurse midwives, nurse anesthetists, clinical nurse specialists, specially trained psychologists in a handful of states, and clinical pharmacists working under specific agreements. Each one’s authority is defined by two things at once: the state license that puts them in practice, and, for any controlled substance, a separate federal registration with the Drug Enforcement Administration.
How State and Federal Law Divide the Job
Prescribing authority starts at the state level. Each state decides which healthcare professionals may write prescriptions and under what conditions, usually through licensing boards like a board of medicine or a board of nursing. Because the rules are set state by state, the same profession can have meaningfully different powers depending on where the provider practices.
Federal law adds a second layer that applies only to controlled substances. Under the Controlled Substances Act, a “practitioner” eligible to prescribe scheduled drugs includes physicians, dentists, veterinarians, and any other person licensed by their state to dispense controlled substances in the course of professional practice.1Office of the Law Revision Counsel. 21 USC 802 – Definitions The definition is deliberately broad and defers back to the states to decide which non-physician professionals qualify.
Physicians Have the Broadest Authority
Medical Doctors (MDs) and Doctors of Osteopathic Medicine (DOs) hold the widest prescribing power of any healthcare profession. Once a physician obtains a state medical license, they can prescribe virtually any medication, both controlled and non-controlled, within the bounds of their clinical training. A cardiologist and a psychiatrist hold the same type of license, but each prescribes within their specialty because professional standards and malpractice liability tie prescribing to competence, not just legal permission.
This is why the physician’s scope is the benchmark other prescribers are measured against. When state legislatures debate expanding authority for nurse practitioners or psychologists, the question is always how much of the physician’s scope to extend, and under what conditions.
Nurse Practitioners and Physician Assistants
Nurse Practitioners (NPs) and Physician Assistants (PAs) are the two largest groups of non-physician prescribers. Both can prescribe controlled and non-controlled medications, but the degree of independence they enjoy varies dramatically by state.
As of early 2026, 27 states plus the District of Columbia grant NPs full practice authority, meaning they can evaluate patients, diagnose conditions, and prescribe medications, including controlled substances, without physician oversight. In the remaining states, NPs work under some form of physician involvement, ranging from a collaborative practice agreement in which a physician periodically reviews the NP’s prescribing to direct supervision models where a physician must be available to approve certain prescriptions.
PAs operate under a similar patchwork. Historically every state required PAs to work under a supervising physician, and while a growing number of states have loosened those requirements, supervision remains common. Even where supervision is required, day-to-day practice usually means the physician oversees rather than approves each individual prescription.
The DEA groups NPs, PAs, nurse midwives, nurse anesthetists, and clinical nurse specialists as “mid-level practitioners” and tracks which states authorize each type to handle controlled substances.2Drug Enforcement Administration. Mid-Level Practitioners Authorization by State – DEA Diversion If your state does not grant your profession controlled-substance authority, a DEA registration will not override that limit.
Specialists With Scope-Limited Authority
Several other professionals can prescribe, but only within their defined area of expertise. Their authority does not extend to conditions outside their specialty, and the exact boundaries are set by state law.
- Dentists (DDS or DMD) prescribe medications for conditions of the mouth, jaw, and related structures. Dentists are one of the professions specifically named in the federal definition of “practitioner,” so they can register with the DEA for controlled substances such as post-procedure pain medication or sedation drugs.1Office of the Law Revision Counsel. 21 USC 802 – Definitions
- Podiatrists (DPM) prescribe for foot and ankle conditions, including post-surgical pain management and infection treatment.
- Optometrists (OD) prescribe eye drops, antibiotics, anti-inflammatory drugs, and other treatments for eye diseases. Their controlled-substance authority varies by state, and some states limit them to certain drug schedules.
- Veterinarians (DVM) hold prescriptive authority exclusively for animals. Like dentists, they are specifically named in the federal practitioner definition and register with the DEA independently.1Office of the Law Revision Counsel. 21 USC 802 – Definitions
- Psychologists have prescriptive authority in seven states: New Mexico, Louisiana, Illinois, Iowa, Idaho, Colorado, and Utah. It requires postdoctoral training in psychopharmacology and a national certification exam on top of the standard psychology license. Prescriptive authority for psychologists also exists within the Department of Defense, the Indian Health Service, and the Public Health Service.
- Clinical pharmacists in some states can prescribe a limited range of medications, typically under a collaborative practice agreement with a physician. This often covers vaccines, contraceptives, or adjustments to existing drug therapy rather than independent diagnosis-and-prescribe authority.
The Extra Federal Step for Controlled Substances
Any prescriber who wants to write a prescription for a controlled substance has to clear a federal hurdle in addition to their state license: registering with the DEA and obtaining a DEA number. The current registration fee is $888 for a three-year period.3Federal Register. Registering Emergency Medical Services Agencies Under the Protecting Patient Access to Emergency Medications Act of 2017 The registration is tied to a specific practice address, so a provider who works at multiple locations may need more than one.
The Controlled Substances Act organizes regulated drugs into five schedules based on their medical usefulness and potential for abuse.4Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances Schedule I drugs, such as heroin and LSD, are considered to have no accepted medical use and cannot be prescribed at all, regardless of who holds the DEA registration. Schedule II through V drugs have recognized medical uses, and a registered prescriber can write for them within the scope their state allows.
What Happens if Someone Prescribes Without Authority
Writing a prescription without the legal authority to do so carries serious consequences at both the state and federal level. Practicing medicine without a license is a criminal offense in every state, typically charged as a felony, with prison sentences of several years and substantial fines common.
On the federal side, distributing or dispensing a controlled substance without proper authorization violates 21 U.S.C. ยง 841, which carries penalties scaled to the type and quantity of drug involved.5Office of the Law Revision Counsel. 21 USC 841 – Prohibited Acts A Even a licensed prescriber can lose DEA registration for a drug-related felony conviction, loss of state license, materially false statements on a registration application, or conduct the DEA finds inconsistent with the public interest.6Office of the Law Revision Counsel. 21 USC 824 – Denial, Revocation, or Suspension of Registration
Losing a DEA registration effectively ends a prescriber’s ability to manage patients who need controlled substances, which for many specialties means the end of a career. The threshold for revocation is not limited to criminal conduct: a pattern of sloppy recordkeeping, prescribing outside accepted medical standards, or failing to keep state licensure current can all trigger DEA action.