PA School Requirements and Prerequisites
Every requirement you need to know before applying — prerequisite courses, GPA benchmarks, patient-care hours, CASPA, testing policies, letters of recommendation, and the complete application timeline.
Quick Reference
PA School Requirements at a Glance
| Requirement | Minimum | Competitive |
|---|---|---|
| Education | Bachelor's degree (any major) | Science-heavy coursework preferred |
| Cumulative GPA | 3.0 | 3.5+ |
| Science GPA | 2.8–3.0 | 3.4+ |
| Patient-care hours | 1,000 hours | 2,000–3,000+ hours |
| PA shadowing | 40+ hours (varies) | 100+ hours with a PA |
| Standardized test | GRE or PA-CAT (many programs optional) | Strong scores if required |
| Letters of recommendation | 3 letters | 3 letters including PA/physician supervisor |
| Personal statement | Required (5,000 chars via CASPA) | Compelling narrative with clinical insight |
| Prerequisite courses | ~60 credit hours of science | All completed with B or better |
Education
Bachelor's Degree Requirements
All accredited PA programs in the United States require applicants to hold a bachelor's degree before matriculation. There is no required major — PA programs accept applicants from any undergraduate background, including biology, chemistry, psychology, nursing, kinesiology, and non-science fields.
What matters is that you complete the required prerequisite courses (listed below) and demonstrate strong academic performance in science coursework. A science-heavy major is not required, but it naturally positions you to complete prerequisites efficiently.
Dr. Tomei's Perspective
Coursework
Required Prerequisite Courses
Prerequisites vary by program, but the courses below are required or strongly recommended by the vast majority of accredited PA programs. Aim for a B or better in every science course — a C in Anatomy or Physiology raises red flags.
Biology with Lab
8 credits (2 semesters)Nearly all programsGeneral Biology I and II with lab. Must include a lab component. Community college prerequisites are widely accepted.
General Chemistry with Lab
8 credits (2 semesters)Nearly all programsGeneral Chemistry I and II with lab. Strong performance in chemistry is a key indicator of PA school readiness.
Organic Chemistry with Lab
4–8 credits (1–2 semesters)Most programsSome programs require only one semester. Lab component typically required. Check each program's specific policy.
Biochemistry
3–4 creditsMost competitive programsIncreasingly required at top programs. Take it before applying — it signals readiness for graduate-level science.
Microbiology
3–4 creditsNearly all programsWith or without lab depending on the program. Covers bacteria, viruses, fungi, and parasites — directly relevant to PA clinical training.
Human Anatomy
3–4 creditsNearly all programsLab component strongly preferred. One of the most important prerequisites — strong performance signals readiness for PA school anatomy coursework.
Human Physiology
3–4 creditsNearly all programsSome programs accept a combined Anatomy & Physiology sequence. Check each program's requirements.
Statistics
3 creditsMost programsBiostatistics or general statistics. Increasingly important for evidence-based medicine. Can be taken at a community college.
Psychology
3 creditsMost programsGeneral or Abnormal Psychology. Demonstrates understanding of the psychological dimensions of patient care.
English / Writing
3–6 creditsMany programsComposition or technical writing. Demonstrates communication skills essential for clinical documentation.
Medical Terminology
1–3 creditsSome programsNot required by all programs but widely recommended. Can often be completed online.
Prerequisites vary by program. Always verify requirements directly with each PA program before enrolling in coursework. For state-specific prerequisite breakdowns, see our state-by-state PA prerequisite guides below.
Academics
Minimum and Competitive GPA
CASPA calculates your GPA separately from your transcript — it includes all attempted coursework, including repeated courses. Your CASPA GPA may differ from your school's GPA. Know both numbers before you apply.
| Tier | Cumulative GPA | Science GPA | Notes |
|---|---|---|---|
| Minimum (most programs) | 3.0 | 2.8–3.0 | Below this, most programs will screen you out before review. |
| Average accepted applicant | 3.5 | 3.4 | National average for matriculants. Aim for this as your floor. |
| Competitive | 3.6+ | 3.5+ | Positions you well at top-ranked programs. |
| Highly competitive | 3.8+ | 3.7+ | Competitive at the most selective programs nationally. |
Dr. Tomei's Perspective
Clinical Experience
Patient-Care Experience and Qualifying Roles
Direct patient-care hours are the most important non-academic requirement for PA school. "Direct" means hands-on contact with patients — not observation, not administrative work, not volunteering in a waiting room. Programs want to see that you have worked alongside healthcare providers and touched patients.
Most programs require 1,000–3,000 hours. Competitive applicants average 2,000+ hours. Quality matters as much as quantity — a role with significant clinical responsibility carries more weight than a high-hour role with minimal patient contact.
| Role | Value | Notes |
|---|---|---|
| Emergency Medical Technician (EMT) | Highly valued | Direct hands-on care. One of the most respected roles by PA admissions committees. |
| Paramedic | Highly valued | Advanced clinical skills. Demonstrates significant patient-care competency. |
| Certified Nursing Assistant (CNA) | Highly valued | Direct patient care in hospital or long-term care settings. |
| Medical Assistant (MA) | Highly valued | Clinical duties in physician offices or urgent care. Varies by setting. |
| Phlebotomist | Accepted | Direct patient contact. Counts at most programs. |
| Patient Care Technician (PCT) | Highly valued | Hospital-based direct care. Strong choice for building hours quickly. |
| Scribe | Accepted (varies) | Some programs count scribing; others do not. Confirm with each program. |
| Surgical Technologist | Highly valued | Operating room experience. Demonstrates advanced clinical exposure. |
| Home Health Aide | Accepted | Direct patient care. Counts at most programs. |
| Volunteer (hospital/clinic) | Does NOT count | Observation and volunteering are not the same as direct patient care. Do not count these hours. |
Observation
Shadowing Requirements
PA shadowing is separate from and does not replace direct patient-care hours. Most programs recommend 40–100+ hours of PA shadowing, though formal requirements vary. Shadowing a PA (not just a physician) is strongly preferred — it demonstrates that you understand the PA role specifically and have made an informed career decision.
Shadow PAs in multiple specialties if possible — primary care, emergency medicine, surgery, and specialty settings all provide different perspectives on the PA role. Document every shadowing experience with the PA's name, NPI, setting, and hours.
Dr. Tomei's Perspective
Standardized Testing
GRE and PA-CAT Policies
Standardized test requirements for PA school have changed significantly in recent years. Many programs dropped the GRE requirement during the COVID-19 pandemic and have not reinstated it. Others have made the GRE optional or replaced it with the PA-CAT.
GRE (Graduate Record Examination)
- Required by some programs; optional or waived at many others
- Verbal, Quantitative, and Analytical Writing sections
- Competitive scores: 155+ Verbal, 155+ Quantitative
- Check each program's current policy — requirements change annually
PA-CAT (PA College Admission Test)
- Newer test designed specifically for PA school applicants
- Covers biological sciences, chemistry, and critical thinking
- Accepted by a growing number of programs as GRE alternative
- Some programs accept PA-CAT only; others accept either
Always verify testing requirements directly with each program before registering for any exam. Requirements change frequently and vary significantly between programs.
Application Portal
CASPA Requirements
CASPA (Centralized Application Service for Physician Assistants) is the primary application portal for PA school. Most programs use CASPA, though Texas uses TPAPAS and some California programs use their own portals. CASPA opens in late April each year.
CASPA recalculates your GPA using its own formula — all attempted hours are included, and repeated courses count twice. Your CASPA GPA may be lower than your transcript GPA. Calculate it before you apply.
CASPA Application Checklist
- Verified transcripts from every college attended
- CASPA GPA calculation (separate from your school's GPA)
- All prerequisite courses listed with grades
- Patient-care experience entries with hours, supervisor, and description
- Shadowing hours (separate from patient-care hours)
- Letters of recommendation (3 typically required)
- Personal statement (5,000 characters maximum)
- Supplemental applications for individual programs
- Program-specific fees paid
- Submission before program-specific deadlines
References
Letters of Recommendation
Most PA programs require 3 letters of recommendation. The strongest applications include at least one letter from a PA or physician who has directly supervised your clinical work, and one from a science faculty member who can speak to your academic ability.
PA or Physician Supervisor
Required or strongly preferred by most programs. Must have directly supervised your patient-care work. A PA letter specifically is required by some programs.
Science Faculty
A professor who taught you in a prerequisite course and can speak to your academic ability, work ethic, and readiness for graduate-level science.
Additional Reference
A third letter from a supervisor, mentor, or faculty member who knows you well. Avoid family members, friends, or anyone who cannot speak to your professional or academic abilities.
Dr. Tomei's Perspective
Written Materials
Personal Statement
CASPA allows up to 5,000 characters for your personal statement. This is your primary opportunity to explain why you chose the PA profession, what clinical experiences shaped that decision, and what you will bring to the program and to patients.
Why PA — not MD, NP, or nursing
Articulate the specific aspects of the PA role that drew you to it. Admissions committees read thousands of essays — vague answers about "helping people" are not enough.
Clinical experiences that shaped your decision
Reference specific patient interactions, clinical moments, or observations that confirmed your choice. Be concrete and specific.
Academic challenges and how you addressed them
If your GPA has weaknesses, address them directly. A proactive explanation is stronger than silence.
What you will contribute
Connect your background, skills, and experiences to what you will bring to the program and to future patients.
Selection Process
Interview Requirements
PA school interviews are typically conducted after a competitive review of your CASPA application. Formats vary by program and include traditional one-on-one interviews, panel interviews, and Multiple Mini Interviews (MMI). Some programs conduct virtual interviews; others require in-person attendance.
Traditional interview
One-on-one or panel format. Expect questions about your clinical experiences, why PA, ethical scenarios, and your understanding of the PA role.
Multiple Mini Interview (MMI)
Rotating stations with brief scenarios. Tests communication, ethical reasoning, and clinical judgment. Increasingly common at competitive programs.
Group interview
Observed group discussion or problem-solving exercise. Evaluates teamwork, communication, and leadership.
Virtual interview
Video-based format. Prepare your environment, lighting, and technology in advance. Treat it with the same formality as in-person.
Planning
PA School Application Timeline
September–December (year before)
Finalize prerequisite coursework; begin patient-care hours if not complete
January–March
Request letters of recommendation; begin personal statement drafts
April
CASPA opens; begin entering application data
May (target)
Submit CASPA application — rolling admissions reward early submission
June–August
Complete supplemental applications; prepare for interviews
September–December
Interviews; receive acceptance, waitlist, or rejection decisions
January–March (following year)
Deposit deadlines; finalize enrollment decision
May–August
Pre-matriculation requirements; PA school begins
Comparison
MD vs PA Admissions Requirements
Both paths require a bachelor's degree and strong science coursework, but the specific requirements, tests, and clinical experience expectations differ significantly.
| Category | MD/DO School | PA School |
|---|---|---|
| Degree required | Bachelor's degree (any major) | Bachelor's degree (any major) |
| Application portal | AMCAS (MD) / AACOMAS (DO) | CASPA (most states) |
| Prerequisite courses | Biology, Chemistry, Physics, Math, English | Biology, Chemistry, Anatomy, Physiology, Microbiology, Statistics |
| Standardized test | MCAT (required) | GRE or PA-CAT (varies by program; many optional) |
| Clinical hours | Clinical shadowing (100–200+ hours) | Direct patient-care hours (1,000–3,000+) |
| GPA benchmark | 3.7+ cumulative for competitive MD programs | 3.5+ cumulative for competitive PA programs |
| Program length | 4 years medical school + 3–7 years residency | 2–3 years PA program |
| Letters of recommendation | 3–4 letters (physician, science faculty) | 3 letters (PA/physician, science faculty) |
By Location
PA School Prerequisite Guides by State
Prerequisites vary by state and program. Each guide below covers the specific courses, GPA benchmarks, and application portals used by programs in that region.
Common Questions
Frequently Asked Questions
What GPA do you need for PA school?
Most PA programs require a minimum cumulative GPA of 3.0, but competitive applicants average 3.5 or higher. Science GPA is evaluated separately and should ideally be 3.2 or above. Programs calculate GPA using CASPA's formula, which may differ from your transcript GPA.
How many patient-care hours do you need for PA school?
Most PA programs require 1,000–3,000 direct patient-care hours. Competitive applicants typically have 2,000+ hours in a hands-on clinical role such as EMT, CNA, medical assistant, or patient care technician. Observation and volunteering do not count as direct patient care.
Do PA schools require the GRE?
GRE requirements vary significantly by program. Many programs have dropped the GRE requirement entirely or made it optional. Some programs now accept the PA-CAT (Physician Assistant College Admission Test) as an alternative. Always check each program's current admissions policy — requirements change frequently.
What is CASPA and how does it work?
CASPA (Centralized Application Service for Physician Assistants) is the primary application portal for PA school. You submit one application through CASPA and designate which programs receive it. CASPA recalculates your GPA using its own formula. Most programs use CASPA, though Texas uses TPAPAS and some California programs use their own portals.
How many letters of recommendation do PA schools require?
Most PA programs require 3 letters of recommendation. At least one should come from a PA or physician who has supervised your clinical work. A science faculty letter is also commonly required. Some programs specify a PA letter specifically — check each program's requirements.
Can I apply to PA school with a low GPA?
A low GPA is a significant obstacle but not always disqualifying. Strategies include completing a post-baccalaureate program, taking upper-division science courses to demonstrate improvement, and building an exceptionally strong patient-care record. Programs look for upward trends. A GPA below 3.0 makes most programs very difficult to enter without remediation.
How long does it take to apply to PA school?
CASPA opens in late April each year. Most programs have rolling admissions, so submitting in May or June gives you the strongest advantage. The full cycle from application to matriculation spans roughly 12–18 months. Plan to spend 2–4 years completing prerequisites and patient-care hours before applying.
What is the difference between PA school and medical school requirements?
PA school requires direct patient-care hours (1,000–3,000+) rather than the MCAT, and uses CASPA rather than AMCAS. Medical school requires the MCAT and emphasizes research and shadowing. PA programs are 2–3 years; medical school is 4 years followed by 3–7 years of residency. Both require a bachelor's degree and similar science prerequisites.
Do prerequisite courses need to be recent?
Many PA programs require prerequisites to be completed within 5–10 years of application. Science courses (Biology, Chemistry, Anatomy, Physiology) are most likely to have recency requirements. If your prerequisites are older, consider retaking them or taking upper-division courses in the same subject area.
What shadowing hours do PA schools require?
Most PA programs recommend 40–100+ hours of PA shadowing, though formal requirements vary. Shadowing a PA (not just a physician) is strongly preferred. Some programs require documented PA shadowing specifically. Shadowing hours are separate from and do not replace direct patient-care hours.
Before You Apply
Final Application Checklist
Ready to Build a Competitive PA School Application?
Dr. Tomei, MD, MBA, MHA, CHSE and the MedTrack Mentors team have guided hundreds of students through the PA school application process. We can help you build your prerequisite plan, strengthen your patient-care profile, and craft a personal statement that stands out.