PA stands for physician assistant, a licensed medical professional who can diagnose illnesses, prescribe medications, order tests, and treat patients. PAs work across nearly every medical specialty, from primary care to surgery, and they handle many of the same clinical tasks as physicians. With a median salary well above $100,000 and strong job growth, the PA role has become one of the fastest-growing careers in healthcare.
What a PA Does Day to Day
A physician assistant’s daily work looks a lot like a doctor’s. PAs examine patients, take medical histories, order and interpret lab tests and imaging like X-rays, diagnose injuries and illnesses, and create treatment plans. They prescribe medications, counsel patients on preventive care, and track progress over time. In surgical settings, a PA may provide care before, during, and after an operation, including closing incisions and assisting the surgeon directly.
The specific tasks shift depending on the specialty. A PA in an orthopedic clinic might spend most of the day evaluating joint injuries and setting broken bones, while a PA in a family medicine office handles everything from childhood vaccinations to managing chronic conditions like diabetes. PAs in emergency departments stitch wounds, stabilize patients, and make rapid diagnostic decisions. This versatility is one of the defining features of the role: PAs are trained as generalists first, then specialize on the job.
How PAs Are Trained
Becoming a PA requires a bachelor’s degree followed by a master’s degree from an accredited physician assistant program, typically called a Master of Science in Physician Assistant Studies. These programs run two to three years and are modeled closely on medical school curricula, covering anatomy, pharmacology, pathology, and clinical medicine in a condensed format.
PA training follows what’s known as a medical model of education, meaning it’s organized around diseases and their diagnosis rather than around nursing theory or a specific patient population. Students complete a minimum of 2,000 hours of supervised clinical rotations across multiple medical and surgical settings. Those rotations typically span about ten months and cycle through areas like internal medicine, pediatrics, emergency medicine, psychiatry, and surgery, giving students broad clinical exposure before they graduate.
How PAs Differ From Nurse Practitioners
PAs and nurse practitioners (NPs) often fill similar roles in a clinic or hospital, but their training paths are fundamentally different. PA programs follow a disease-centered medical model and require at least 2,000 clinical hours across a wide range of specialties. NP programs follow a patient-focused nursing model, require a minimum of 500 clinical rotation hours, and typically train students in a specific population, such as pediatrics or women’s health.
The educational background also diverges early. NPs start with a Bachelor of Science in Nursing, earn a registered nurse license, and then complete a Master of Science in Nursing or a Doctor of Nursing Practice degree. PAs can enter their programs with any bachelor’s degree, though most have heavy science coursework and prior healthcare experience. In practice, both PAs and NPs can diagnose, treat, and prescribe, and many patients see either provider for routine and urgent care without a meaningful difference in the visit itself.
Certification and Ongoing Requirements
After graduating, PAs must pass the Physician Assistant National Certifying Exam, known as the PANCE, to earn their certification. This is administered by the National Commission on Certification of Physician Assistants (NCCPA) and is required for licensure in every state.
Certification doesn’t end with that initial exam. PAs operate on a 10-year certification maintenance cycle, divided into five two-year periods. During each two-year cycle, a PA must complete and log at least 100 continuing medical education (CME) credits, with at least half coming from Category 1 sources (formal, accredited educational activities). This structure ensures PAs stay current with evolving medical knowledge throughout their careers.
Prescribing Authority
PAs can prescribe medications in all 50 states, including controlled substances. The exact scope of prescribing authority varies by state. The DEA classifies PAs as mid-level practitioners who are authorized to prescribe controlled substances, including opioids and stimulants, as long as the state where they practice permits it. Most states allow PAs to prescribe Schedule II through Schedule V controlled substances, though some require a collaborative agreement with a supervising physician or place limits on refills and quantities.
The “Physician Associate” Name Change
You may see the title “physician associate” used alongside “physician assistant.” The American Academy of PAs (AAPA) officially changed its legal name to reflect the newer title, and five state chapters have followed. The shift is meant to better describe the collaborative nature of the role, since “assistant” can imply PAs simply follow orders rather than making independent clinical decisions.
However, the change is far from complete. The AAPA’s own legal counsel strongly discourages PAs from calling themselves “physician associates” in clinical settings right now. Until a PA’s specific state formally adopts the new title through legislation, using it could create regulatory problems, disciplinary actions, or malpractice issues. For the time being, “physician assistant” and “PA” remain the correct legal titles in clinical practice across most of the country.
Salary and Job Outlook
The PA profession pays well and is growing quickly. According to the U.S. Bureau of Labor Statistics, physician assistants earn a median salary that places them among the higher-paid healthcare professionals, and demand for PAs is projected to grow much faster than average over the next decade. The combination of a shorter training path than medical school (two to three years of graduate study versus four years plus residency), strong compensation, and the flexibility to switch specialties without additional formal training makes the PA career path attractive to many people entering healthcare.