Online PA School Prerequisites: The Complete Guide for 2026 Applicants- If you’re planning to apply to PA school, you already know the math is brutal. The Physician Assistant Education Association (PAEA) reports that the average PA program receives more than 1,500 applications for around 50 seats — an acceptance rate below 4% at many schools. The applicants who get in didn’t just have the GPA. They had the right prerequisites, taken at the right kind of institution, finished on time for the CASPA cycle.
This guide is written for the people who don’t have all of that yet. Career-changers without science backgrounds. EMTs and paramedics who built clinical hours but skipped the chemistry sequence. Nurses moving from RN to PA. Recent biology graduates missing one or two specific courses. Reapplicants whose prereqs are about to age out. If you’re in one of those buckets, the question isn’t whether you can finish the courses you need — it’s how fast and how cheaply, from a regionally accredited institution that CASPA programs will actually accept.
That’s what this article is about. We cover every course PA programs typically require, what counts as a valid online prerequisite, the timeline you’re realistically looking at, the cost differences between your options, and how to put together a plan that gets your CASPA application submitted on the earliest possible date.
Most online articles treat PA prereqs and pre-med prereqs as interchangeable. They aren’t. Three big differences are worth getting straight before you build your course plan.
Medical school admissions weight general chemistry, organic chemistry, and physics heavily because the MCAT does. PA schools don’t require the MCAT — most accept the GRE or no standardized test at all. What they want instead is evidence that you can handle the clinical sciences. That means Anatomy & Physiology I and II with lab, Microbiology with lab, and often Medical Terminology — courses that pre-meds frequently skip. If you’re switching focus from med school to PA school, your science stack is going to need additions, not just rearrangement.
This isn’t a course requirement, but it shapes how you spend your time during the prerequisite phase. The average matriculant has around 3,000 hours of direct patient care before applying. If you’re working full-time as an EMT, scribe, MA, CNA, or in another PCE-qualifying role, you need prerequisite courses that don’t conflict with shift work. That’s why self-paced, asynchronous online courses tend to be the realistic option — not evening classes at a community college that meet twice a week.
Many PA programs apply a 5-to-10-year recency window on science prerequisites, especially Anatomy & Physiology and Biochemistry. Med schools are usually more lenient. If you took your science courses in 2015 or earlier and you’re applying in 2026, you may need to retake some of them — even if your grades were strong. We cover this in detail below.
Specific requirements vary by program, but the courses below appear on the prerequisite lists of essentially every CASPA-participating program in the United States. The CASPA prerequisite reference at the PAEA Program Directory is the authoritative place to verify each school’s exact list.
| Course | Typical Credits | Lab Required? | Notes |
| General Biology I | 3–4 | Yes | Some programs accept only one semester |
| General Biology II | 3–4 | Yes | Not always required — check program list |
| General Chemistry I | 3–4 | Yes | Required by 95%+ of programs |
| General Chemistry II | 3–4 | Yes | Required by 90%+ of programs |
| Organic Chemistry | 3–4 | Sometimes | Often only one semester required |
| Biochemistry | 3–4 | No | Required by ~70% of programs; growing trend |
| Anatomy & Physiology I | 4 | Yes | Universally required |
| Anatomy & Physiology II | 4 | Yes | Universally required |
| Microbiology | 4 | Yes | Universally required |
| Statistics | 3 | No | Most programs require introductory stats |
| Psychology (Intro) | 3 | No | Universally required |
| Developmental or Abnormal Psychology | 3 | No | Required by ~50% of programs |
| Medical Terminology | 1–3 | No | Strongly recommended; required by some |
| English Composition | 3–6 | No | Universally required |
| How to read this table: These are the most common requirements — your target programs may require fewer (some don’t require Organic Chemistry at all) or more (a handful require Genetics, Cell Biology, or Nutrition). Build your specific list from the actual prerequisite pages of every program you plan to apply to. Don’t rely on aggregator sites — they go out of date. |
A typical PA prerequisite stack is 40 to 55 credit hours, depending on how many of the optional-but-common courses (Biochemistry, second-semester Organic, second-semester Psychology) your target programs require. If you’re starting from a non-science bachelor’s degree with zero prereqs done, plan for the full 55. If you have most of the introductory chemistry and biology already, you might only need 12 to 20 additional credits.
Yes — with conditions. The blanket ‘online courses don’t count’ policy that some PA program websites still display was largely written before 2020. The pandemic forced every accredited institution in the country to move coursework online, and admissions committees adapted. Today, the dominant practice is that online prerequisites are accepted when they meet three conditions:
Where individual programs still resist online prereqs, the resistance is usually centered on Anatomy & Physiology and Microbiology — the courses where the lab matters most. A growing list of programs have moved past this. Some still haven’t. Check each program’s prerequisite page explicitly for language about online courses and online labs before enrolling.
| Quick check before you enroll: Search the program’s prerequisite page for the words ‘online’, ‘distance’, ‘virtual lab’, and ‘hybrid’. If any of those words appear with restrictive language, contact admissions before paying tuition for a course that won’t transfer. A two-minute email saves a $700 mistake. |
This is the question that derails the most prerequisite plans. The short version: most CASPA programs now accept online labs as long as the lab is an integrated part of a regionally accredited science course that produces a single letter grade and appears on the institution’s official transcript.
What programs don’t accept is a separate, standalone ‘lab kit’ purchased independently of a course. The lab needs to be embedded in the course itself, with structured experiments, lab reports, and an instructor evaluating the lab work. At-home labs that meet this bar (virtual dissections, microscope work via lab kit, structured assignments graded by faculty) are widely accepted as of 2026.
If you’re choosing an online provider, the question to ask isn’t ‘is the lab online?’ — it’s ‘is the lab graded by faculty at a regionally accredited institution, and does it appear on the transcript as part of a single course grade?’ If the answer is yes to both, you’re in good shape with most programs.
This is the single most common reason an otherwise-strong applicant gets rejected at the transcript verification stage. CASPA programs almost universally require prerequisite courses from regionally accredited institutions. Many of the cheap, fast online providers that show up in Google ads are nationally accredited — which sounds equivalent but isn’t.
Regional accreditation is the older, more rigorous form of US institutional accreditation. The U.S. Department of Education’s database lists regional accreditors by region — examples include the Higher Learning Commission (HLC) in the Midwest, the Middle States Commission on Higher Education, and the Southern Association of Colleges and Schools (SACSCOC). Every Ivy League school, every state university, and the vast majority of nonprofit four-year institutions in the United States are regionally accredited. Coursework from these institutions transfers cleanly to virtually any graduate program.
National accreditation is held primarily by for-profit, technical, and vocational institutions. These accreditations are real and legitimate for their purposes — but graduate programs frequently refuse to accept coursework from nationally accredited institutions. Some of the well-known cheap online prereq providers are nationally accredited. If you take General Chemistry from one of them and try to apply it to a PA school’s prerequisite list, you may discover at verification that it doesn’t count — after you’ve already paid for the course.
| Before you pay tuition anywhere: Look up the institution at the U.S. Department of Education’s accreditation database. If the accreditor isn’t one of the six regional bodies (HLC, MSCHE, NEASC/NECHE, NWCCU, SACSCOC, or WSCUC), assume your target PA programs will not accept the credit and verify with admissions before enrolling. |
This is why PrereqCourses.com partners with Upper Iowa University (regionally accredited by HLC) — the courses appear on a UIU transcript and transfer to graduate programs the way coursework from any regionally accredited university would. The credential on your transcript is the credential the admissions committee evaluates.
Three timelines come up most often:
Self-paced online prerequisites can typically be finished in 4 to 8 weeks per course, though most providers cap how quickly you can submit graded work. If you have time to study 15–20 hours a week, plan on roughly six weeks per course as a working number. Two or three courses can be stacked in parallel if your job allows it.
This is the typical career-changer scenario. With moderate work commitments, 9 to 14 months is a realistic timeline — running two courses at a time, with breaks between course pairs. The bottleneck isn’t usually the coursework; it’s the sequencing requirement (General Chemistry before Organic, Biology before Anatomy & Physiology in some programs) and how many lab courses your provider allows you to run simultaneously.
A complete prerequisite stack — 15+ courses, 50+ credits — taken self-paced while working part-time is realistically 18 to 24 months. A full-time effort can compress that to 12–15 months. Either way, you’re going to be looking at the CASPA cycle that’s at least 18 months from where you sit today.
| Time to first CASPA cycle: CASPA opens in late April each year. If you start prereqs today, look at your earliest realistic finish date for the last course (including lab time and transcript posting), then check it against the CASPA cycle calendar. The transcript needs to be received and verified before you submit, which adds two to four weeks on top of the course end date. Don’t cut this margin thin. |
Costs vary by a factor of 10 or more depending on where you take the courses. Here’s what the four common paths actually run in 2026:
| Path | Per-Credit Cost | Per-Course (4cr) | Full Stack (50cr) |
| Community college (in-state) | $150–$250 | $600–$1,000 | $7,500–$12,500 |
| Community college (out-of-state) | $400–$700 | $1,600–$2,800 | $20,000–$35,000 |
| Four-year university (in-state) | $500–$900 | $2,000–$3,600 | $25,000–$45,000 |
| Four-year post-bacc program | $1,200–$2,500 | $4,800–$10,000 | $60,000–$125,000 |
| Self-paced online (PrereqCourses.com) | $169 | $675–$695 | ~$8,400 |
The community college path is the cheapest if you’re an in-state resident and can attend physically. The post-bacc path is the most expensive by an order of magnitude — typically a one-year, full-time program at a four-year institution. The middle ground for working applicants is self-paced online from a regionally accredited four-year university, which combines the price advantage of online delivery with transcript credit from an institution PA programs unambiguously accept.
Worth noting on cost: PA school itself is going to cost you $80,000–$150,000 in tuition over 24–28 months. Spending $25,000 on prereqs at a four-year university isn’t financially catastrophic in that context — but it’s a meaningful difference when your decision is between getting to apply this cycle and waiting another year. Cheaper, faster prereqs from a regionally accredited institution let you submit earlier in the cycle, when acceptance rates are statistically higher.
If your bachelor’s degree is in business, English, history, or another non-science field, you’re probably looking at the full stack — General Biology, both semesters of General Chemistry, Anatomy & Physiology I and II, Microbiology, Statistics, and likely Biochemistry. The sequencing question matters: take General Chemistry before Organic, and take General Biology before Anatomy & Physiology if your provider treats it as a prerequisite (some don’t).
The realistic timeline is 18–24 months of part-time study while you also accumulate the 1,000–3,000 hours of patient care experience PA programs expect. Many career-changers work as scribes, EMTs, or MAs during the prereq phase — the income isn’t great, but it builds the PCE hours simultaneously.
This is the largest single segment of CASPA applicants, and the one with the most-skewed preparation profile: heavy PCE hours, light science prerequisites. If you’re an EMT or paramedic, your patient care hours are probably already strong. What you typically need are the science courses — usually General Chemistry, Organic or Biochemistry, A&P (if you haven’t taken it for your certification), Microbiology, and Statistics.
The advantage of your background: A&P content is partially familiar from your EMT/paramedic training, so the courses tend to feel less brutal than they do for pure career-changers. The disadvantage: shift work makes traditional class schedules nearly impossible. Self-paced online courses solve this problem directly.
Nurses moving to PA school often have most of the prereqs already — Anatomy & Physiology, Microbiology, Statistics, and Psychology are standard parts of nursing curricula. The gaps are usually General Chemistry, Organic Chemistry, and Biochemistry — courses many nursing programs don’t require. Your prereq plan is probably 4–6 chemistry courses, not a full stack. The CASPA application also accepts your nursing license and clinical hours as patient care experience, which is a significant advantage.
One thing to watch: some PA programs are explicit that prerequisite chemistry courses must be the standard sequence designed for science majors, not the abbreviated chemistry course offered to nursing students. Verify with each program whether your nursing-program chemistry will count, or whether you need to take the standard sequence.
Navy Corpsmen, Army Medics, and Air Force Medical Technicians enter the PA pipeline with extraordinary clinical experience but a prerequisite profile similar to EMTs — lots of PCE, light on the formal science coursework. GI Bill benefits and the Yellow Ribbon program cover most prerequisite tuition, including at regionally accredited online providers. The VA’s GI Bill Comparison Tool lets you check institution-by-institution which benefits apply.
Several PA programs explicitly favor veteran applicants and waive certain prereqs in recognition of military medical training. The Interservice Physician Assistant Program (IPAP) is the largest PA program in the country and operates on a different track entirely — worth investigating if you’re still active-duty.
CASPA reports prerequisite GPA separately from cumulative GPA. Both matter. The matriculant averages in recent cycles:
The prerequisite GPA is the most heavily weighted of the three at most programs. A 3.2 prereq GPA is going to be hard to overcome unless your PCE hours, GRE scores, and letters of recommendation are exceptional. If your prereq GPA is below the matriculant average, retaking weak courses is often the highest-leverage move you can make. CASPA averages all attempts of a course — so a C and then an A averages to a B — which still pulls your GPA up meaningfully.
| Strategic retake math: If you have a C in General Chemistry I from five years ago and you retake it and earn an A, CASPA reports both. Your individual course GPA for Gen Chem I averages to 3.0, but your prerequisite GPA across the whole stack improves. More importantly, admissions readers see that you reclaimed the material — which speaks to your readiness for PA school’s pace. |
This catches reapplicants and late-career-changers off guard. Most PA programs apply a five-to-ten-year recency window on science prerequisites — meaning if your General Chemistry course is older than that, you need to retake it. The most strictly enforced windows are on Anatomy & Physiology, Microbiology, and Biochemistry.
If you took your science courses in 2014 and you’re applying in 2026, assume you need to retake A&P, Microbiology, and likely Biochemistry. Other courses (Statistics, English Composition, Psychology) are usually exempt from recency rules. Check each program’s policy explicitly — some programs publish the window, others apply it case-by-case.
The good news: retaking expired prereqs gives you the chance to lift your prereq GPA, which is often higher-leverage than the underlying recency requirement. A 3.8 in retaken A&P from this year tells admissions a different story than a 3.4 from 2012 — even if both technically counted.
CASPA opens in late April each year and runs until the following March, but the cycle that matters for you is much shorter. Most PA programs use rolling admissions, which means earlier submissions have meaningfully higher acceptance rates. Submitting in late April or May puts you in front of admissions readers when seats are still open. Submitting in October or November means you’re competing for the last few seats.
The implication for your prerequisite plan: work backward from the CASPA submission target, not forward from today.
Working from that anchor, you know how many courses you can realistically fit in. If you have 12 prereqs to take and you’re 12 months out from your last-course deadline, you need to be running at least one course continuously — usually two — to make it. If the math doesn’t work for the May cycle, target the following year and don’t rush.
| Submitting late costs more than waiting a year: A rushed application submitted in November against an unfinished prereq list usually doesn’t get the interview, which means you’re applying again the following cycle anyway — having paid the CASPA fees for nothing. If your prereqs aren’t done by March, target the next cycle and use the extra time to lift PCE hours and prereq GPA. |
In principle, yes — every prerequisite on the standard CASPA list is available online from regionally accredited institutions, including the lab sciences. In practice, you should verify with each target program that their language doesn’t restrict any specific course (most often A&P or Microbiology) to in-person delivery. As of 2026, most programs have moved past these restrictions, but a minority still hold the line.
Self-paced courses can typically be completed in 4–8 weeks of focused effort. Most providers cap how quickly you can submit graded assignments, so plan on six weeks per course as a planning estimate. Lab sciences sometimes run longer because of the lab component pacing.
The transcript shows the course code and credit hours from the institution — it doesn’t generally distinguish online from in-person delivery. What admissions readers see is the institution name and the grade. As long as the institution is regionally accredited, the delivery mode isn’t typically a topic of conversation.
Some sequencing is enforced by the provider — you usually can’t take Organic Chemistry without General Chemistry I and II. Beyond that, the typical sequence is: General Biology and General Chemistry first; Anatomy & Physiology and Microbiology after Biology; Organic and Biochemistry after General Chemistry; Statistics, Psychology, and Medical Terminology anywhere in the plan.
Yes. CASPA averages all attempts, so a retake doesn’t replace a prior grade — but it does raise your overall prerequisite GPA and signal renewed academic momentum to admissions readers. For prereqs older than your target program’s recency window, retaking isn’t optional regardless of the original grade.
A full prerequisite stack through a regionally accredited online provider runs $8,000–$10,000 total. A full-time, one-year post-bacc program at a four-year university typically costs $40,000–$80,000 plus living expenses for the year off work. For applicants who don’t need the structure of a residential post-bacc, the online path saves $30,000–$70,000 and lets you keep working during the prerequisite phase.
It’s a competitive disadvantage but not disqualifying. Programs evaluate prereq GPA alongside cumulative GPA, PCE hours, GRE score (if required), letters of recommendation, and the personal statement. A 3.3 prereq GPA combined with 4,000 hours of high-acuity patient care experience is a stronger application than a 3.7 prereq GPA with 800 hours. If your prereq GPA is under 3.3, strategic retakes are usually the highest-leverage move.
Roughly 80% overlap, 20% variance. The core science stack (Biology, Chemistry, A&P, Microbiology) is nearly universal. The variances come from second-semester Organic Chemistry, Biochemistry, Genetics, Cell Biology, and Nutrition — courses some programs require and others don’t. Build your list as the union of every program you plan to apply to.
PrereqCourses.com offers regionally accredited prerequisite courses through Upper Iowa University, a four-year university accredited by the Higher Learning Commission since 1923. Courses run self-paced, online, with embedded labs where required. The full credit appears on the official UIU transcript, which transfers to CASPA programs the same way coursework from any regionally accredited four-year university does.
Course tuition is $169 per credit hour — typically $675 for a 4-credit lab science. Courses can be completed in as little as four to eight weeks. Enrollment is monthly, so you don’t wait for a fall or spring semester to start. The combination of regional accreditation, four-year university transcripts, fast completion, and low per-course cost is what makes this path work for applicants who need to finish prereqs without quitting their job or delaying their CASPA cycle.
To explore specific courses, visit the PrereqCourses.com course catalog. For applicants who want help mapping their target programs’ prerequisites against the available course list, the contact page connects you with an advisor who can review your specific situation.
If you’re early in the planning process, the highest-leverage thing you can do this week is:
PA school admissions is competitive, but the prerequisite phase is the part that’s most under your control. The applicants who get in on their first cycle aren’t the ones with the most-impressive backgrounds — they’re the ones who planned the prereqs, the PCE hours, and the application timeline as a single project, and executed it without surprises. The faster, cheaper, and more accreditation-clean your prerequisites are, the more bandwidth you have for everything else.
| Ready to start your PA school prerequisites? Self-paced online prerequisite courses from a regionally accredited four-year university. Enroll any month. Finish in as little as 8 weeks. Browse PA School Prerequisite Courses → |
This article reflects general 2026 prerequisite practices across CASPA-participating PA programs. Specific requirements vary by program — always verify against each program’s official prerequisite page before enrolling.
