A physician associate (PA) is a licensed medical professional who diagnoses illnesses, develops treatment plans, and prescribes medications, including controlled substances in most states. PAs practice across virtually every medical specialty, from primary care to surgery, and work alongside physicians as part of a healthcare team. The title “physician associate” is relatively new, adopted in 2021 to replace “physician assistant,” though both terms still appear in state laws, job listings, and everyday conversation.
Why the Title Changed
For decades, PAs practiced under the title “physician assistant.” The problem was that “assistant” suggested a helper role that didn’t match what PAs actually do in clinical practice. In May 2021, the American Academy of Physician Associates voted to change the professional title to “physician associate” after a three-year review process. A survey found that 71% of patients agreed the new title better matched the job description of a PA. The shift is still rolling out: state legislatures, licensing boards, and healthcare systems are updating their language at different speeds, so you’ll see both titles used interchangeably for now.
What PAs Do in Practice
PAs perform many of the same clinical tasks as physicians. They conduct physical exams, order and interpret diagnostic tests, diagnose conditions, create treatment plans, and counsel patients on preventive care. In surgical specialties, PAs assist in the operating room and manage pre- and post-operative care.
Prescribing authority is a core part of the role. PAs can prescribe medications, including Schedule II through V controlled substances, in states that authorize it. The specifics vary by state, but in practice, most PAs write prescriptions as a routine part of patient care. Each PA who prescribes controlled substances registers with the Drug Enforcement Administration as a mid-level practitioner.
In 47 states, PAs practice under physician supervision, though the definition of “supervision” ranges widely. In some states, the supervising physician doesn’t need to be physically present and may oversee care through periodic chart reviews. Alaska and Illinois use a collaborative agreement model instead of formal supervision. New Mexico requires supervision only for PAs with fewer than three years of experience or those working in specialty care.
Education and Training
PA programs follow a medical school model. Students take courses in anatomy, pharmacology, pathophysiology, and clinical medicine, then rotate through multiple medical specialties. Most programs run approximately 27 months (three academic years) and award a master’s degree. During that time, students complete more than 2,000 hours of clinical rotations in family medicine, internal medicine, general surgery, pediatrics, obstetrics and gynecology, emergency medicine, and psychiatry.
This generalist training is one of the profession’s defining features. Unlike nurse practitioners, who train in a chosen population focus area such as family health, pediatrics, or psychiatric care, PAs are trained broadly across disciplines. That generalist foundation allows PAs to switch specialties throughout their career without returning to school, something few other healthcare professions offer.
Admission to PA programs typically requires a bachelor’s degree, prerequisite science coursework, and direct patient care experience. Many applicants work as EMTs, medical assistants, or scribes before applying.
Certification and Licensing
After graduating, PAs must pass the Physician Assistant National Certifying Exam (PANCE) to earn board certification and become eligible for state licensure. The exam is administered by the National Commission on Certification of Physician Assistants (NCCPA).
Certification isn’t a one-time event. PAs follow a 10-year certification maintenance cycle broken into five two-year periods. During each two-year cycle, they must earn and log 100 continuing medical education credits. By the end of the 10-year cycle, PAs must pass a recertifying exam, either a traditional test or a newer longitudinal assessment that spreads questions out over time. This ongoing process ensures PAs stay current with evolving medical standards throughout their careers.
How PAs Differ From Nurse Practitioners
PAs and nurse practitioners (NPs) overlap significantly in what they do day to day, which is why the two professions are frequently compared. The core difference is educational philosophy. PA training is modeled on the medical school curriculum: students learn medicine as generalists, rotating through multiple specialties. NP training is rooted in advanced nursing practice, and NP students must already hold a registered nursing license before entering their program. NPs also specialize during their training, choosing a population focus like adult and geriatric care, neonatal care, or women’s health.
In practical terms, both PAs and NPs diagnose, treat, and prescribe. State laws govern what each can do, and those laws vary considerably. Some states grant NPs full independent practice authority while still requiring PAs to have a supervisory or collaborative relationship with a physician. The patient experience, however, is often similar regardless of which provider they see.
Job Growth and Career Outlook
The Bureau of Labor Statistics projects employment of physician associates to grow 20% from 2024 to 2034, far outpacing the average for all occupations. This growth is driven by an aging population, expanding healthcare access, and the cost-effectiveness of team-based care models that include PAs.
PAs work in nearly every setting: hospitals, outpatient clinics, urgent care centers, rural health facilities, and specialty practices. The flexibility to change specialties without additional formal education makes the profession appealing to people who want variety over the course of a long career. A PA who starts in orthopedic surgery can transition to dermatology or emergency medicine with on-the-job training, a shift that would require years of additional schooling for a physician.