Physician Assistant (PA)

Physician Assistants (PAs) are licensed clinicians who practice medicine as part of a collaborative care team, working alongside physicians, nurses, and other providers. PAs can take patient histories, perform physical exams, diagnose and treat illness, order and interpret tests, develop treatment plans, and prescribe medication in all 50 states. Because PA education follows a generalist medical model (similar in structure to medical school, though shorter), PAs often have flexibility to move between specialties over the course of their career without completing a new residency each time—a notable difference from the physician path.

PA may be a good fit for students who want a strong, hands-on clinical role with significant patient responsibility, but a shorter training timeline than medical school (PA programs are typically 24–27 months, compared to 4 years of medical school plus residency).

Why students sometimes choose PA over MD/DO: shorter time to practice, the ability to switch specialties more flexibly later in a career, and a strong emphasis on team-based, collaborative care.

Why students sometimes choose MD/DO over PA: greater autonomy and scope of practice (especially relevant in some states/specialties), the option to pursue surgical subspecialties or research-intensive academic medicine, and, for some, a preference for the physician-led model of care.

Neither path is “easier”—they’re different roles with different training models, and the right fit depends on what kind of clinical responsibility and career flexibility you’re looking for.

References: American Academy of PAs (AAPA); Physician Assistant Education Association (PAEA)

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Unlike nursing, which has multiple credential levels (ADN, BSN, MSN, DNP) and multiple paths to the same role, the PA profession has one primary credential: a Master’s degree from an ARC-PA accredited PA program. Graduates take the PANCE (Physician Assistant National Certifying Exam) to become licensed as a PA-C.

There are roughly 290 ARC-PA accredited PA programs in the U.S. Nearly all require an existing bachelor’s degree before matriculation. Programs are typically full-time, cohort-based, and structured in two phases:

• Didactic phase (~1 year): classroom and lab-based coursework in anatomy, physiology, pharmacology, and clinical medicine
• Clinical phase (~1 year): rotations across core specialties (e.g., family medicine, internal medicine, surgery, pediatrics, emergency medicine, psychiatry, women’s health)

A small but growing number of programs now offer a Doctor of Medical Science (DMSc) as a post-graduate option for practicing PAs. This is not an entry-level degree, and is not required for PA licensure or practice. As in nursing’s MSN/DNP landscape, a doctoral-level credential exists and is growing for the PA career, but the master’s-level degree remains the standard for entering practice as of 2026.

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PA programs require a set of science prerequisites that overlaps substantially with standard pre-med coursework.

Every program sets its own specific requirements, so it’s important to always confirm directly with each school, but the table below gives a general sense of where the two paths align and diverge.

Subject	Typically Required for PA	Typically Required for Pre-Med (MD/DO)
General Biology (w/ lab)	Yes — usually 2 semesters	Yes — usually 2 semesters
General Chemistry (w/ lab)	Yes — usually 2 semesters	Yes — usually 2 semesters
Organic Chemistry (w/ lab)	Varies — some require 1 semester, some require biochemistry instead, some require both	Yes — typically 2 semesters (or 1 semester + biochemistry, depending on school)
Biochemistry	Often required or accepted in place of part of the organic chemistry sequence	Often required, especially for MCAT prep
Physics (w/ lab)	Less commonly required than for med school — varies by program	Yes — usually 2 semesters
Anatomy & Physiology	Frequently required (sometimes combined, sometimes separate courses) — not currently offered at Wesleyan	Not always a standalone requirement, but helpful for MCAT
Microbiology (w/ lab)	Often required — not currently offered at Wesleyan	Sometimes recommended, not always required
Statistics	Commonly required	Often satisfied via MCAT-relevant coursework, not always a hard requirement
Psychology	Commonly required or recommended	Increasingly relevant given MCAT’s behavioral sciences section
English Composition	Sometimes required	Less commonly a hard prerequisite

Key takeaway: if you’re undecided between PA and MD/DO, a typical pre-med course load (biology, general chemistry, organic chemistry, physics, biochemistry) will satisfy most PA prerequisites as well—but PA programs are more likely to expect anatomy/physiology and microbiology specifically, both of which Wesleyan does not currently offer.

Students leaning PA should plan early to complete these either through a local institution, a summer program, or a post-bacc, since they’re common gaps for Wesleyan applicants.

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This is one of the biggest differences between the PA path and the MD/DO path: PA programs place heavy weight on direct, hands-on patient care experience (PCE) prior to matriculation, far more than is typically expected for med school applicants.

How much is required? This varies widely by program. Some schools may require as little as 300 hours while others have a 2,000-hour minimum. Competitive applicants nationally often have well above the stated minimum, commonly in the 2,000–3,000+ hour range. Because there’s no universal standard, it is important to check each program’s specific requirement rather than assuming a single number applies across the board.

What counts as PCE? Generally, programs are strict about what qualifies as direct, hands-on contact with patients. It is important to note that this category does not include shadowing, administrative, or research work. Common qualifying roles include EMT/paramedic, CNA/nurse’s aide, medical scribe (accepted by some programs, not others), phlebotomist, athletic trainer, or military medic. Hours from shadowing, observation, or non-clinical research generally do not count toward PCE, even though they may strengthen an application in other ways.

Shadowing a PA is commonly expected (typically 40-100+ hours) and this is tracked entirely separate to your PCE. Shadowing a PA is viewed as evidence that you understand the PA role specifically (not just “healthcare” generally), and is also a common source of a strong letter of recommendation.

Because PCE hours can take a long time to accumulate, students interested in PA should start building this experience beginning the summer after sophomore or junior year, if not earlier, so that they have enough hours to showcase in advance of an application.

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Unlike medical school (MCAT) and nursing (TEAS/HESI), there is no single standardized test required across all PA programs. Requirements vary by school:

• GRE: A shrinking minority of programs require it, roughly a quarter of accredited programs as of the 2026–2027 cycle, with many others making it optional or not considering it at all. Check each program on your list individually, since this can change between cycles.
• CASPer: A situational judgment test used by some PA programs as part of a holistic application review. Some schools that previously required it have since dropped it.
• PA-CAT: A newer, PA-specific admissions exam used by a small number of programs, covering core prerequisite science subjects.

Because testing requirements vary, the most efficient approach is to build your school list first, then determine which tests (if any) you’ll need based on that specific list.

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PA programs use a centralized application system called CASPA (Centralized Application Service for Physician Assistants), run by the Physician Assistant Education Association (PAEA) and used by the large majority of accredited PA programs.

How the cycle works:

• CASPA opens in late April each year and stays open through early the following April — an unusually long cycle compared to AMCAS (medical school).
• Unlike AMCAS, individual programs each set their own deadline from a menu of options — there is no single universal deadline. Always check each specific program’s deadline, and note whether it requires your application to simply be submitted, complete (transcripts and letters in), or fully verified by CASPA (the most stringent standard).
• Most PA programs use rolling admissions, meaning they review applications and extend interviews as they come in, rather than waiting until their final deadline. This makes applying early in the cycle (ideally within the first few weeks) a real advantage — by the time a later deadline arrives, many interview slots may already be filled.
• CASPA verification (matching transcripts, recalculating GPA, confirming letters) typically takes 4–6 weeks, especially during the busiest submission period in May and June. Build this processing time into your planning.

General planning timeline:

• 12+ months out: Confirm coursework prerequisites for your target programs; begin or continue accumulating PCE hours and PA shadowing.
• Several months before the cycle opens: Request letters of recommendation, draft your personal statement, and confirm whether any programs on your list require GRE, CASPer, or PA-CAT, and register/prepare accordingly.
• As soon as CASPA opens (late April): Begin entering coursework, requesting transcripts, and submitting your application, aim to submit within the first few weeks given the prevalence of rolling admissions.
• Throughout the cycle: Respond promptly to any program-specific supplemental applications, which often arrive shortly after CASPA submission and carry their own deadlines.

Meet with your Health Professions advisor to build a personalized timeline and confirm which programs on your list have specific testing or supplemental requirements.