Quick answer: Several nursing pathways accept students who have not completed college-level science prerequisites. CNA programs have no academic prerequisites at all. LPN/LVN programs typically require only a high school diploma or GED. Some ADN programs allow concurrent enrollment, meaning you take prerequisites while enrolled in the nursing program. Accelerated BSN programs for career-changers require a prior bachelor’s degree but usually waive nursing-specific science prerequisites. If you have no completed prerequisites today, CNA and LPN are your fastest entry points into clinical nursing.
At a glance: program types and prerequisite requirements
| Program | Prerequisites required? | Minimum eligibility | Estimated timeline to licensure |
|---|---|---|---|
| CNA | None | High school diploma or GED | 4–12 weeks |
| LPN/LVN | None (HS diploma/GED only) | High school diploma or GED | 12–18 months |
| ADN (community college RN) | Usually yes — but concurrent enrollment available at some programs | High school diploma; concurrent science courses | 2–3 years including prerequisites |
| ABSN (accelerated BSN) | Bachelor’s degree required; science prerequisites often waived | Non-nursing bachelor’s degree | 12–20 months |
| Direct-entry MSN | Bachelor’s in any field | Non-nursing bachelor’s degree | 2–3 years |
| Online RN (open enrollment) | Varies; some accept concurrent enrollment | High school diploma; program-dependent | 2–3 years |
CNA programs: no prerequisites, fastest entry
Certified Nursing Assistant programs are the only pathway into hands-on patient care with zero academic prerequisites. You need a high school diploma or GED at most programs — some states do not even require that for enrollment, though they do for the state certification exam.
What CNA training covers:
- Basic patient care: bathing, feeding, repositioning
- Vital signs measurement
- Infection control
- Communication and patient rights
- Clinical practicum (typically 16–24 supervised clinical hours)
Program length: 4 to 12 weeks, depending on state requirements. The federal minimum is 75 training hours, but states set their own minimums — California requires 150 hours, for example.
Cost: $500–$3,000 at vocational schools; some nursing homes and long-term care facilities pay for CNA training in exchange for a work commitment post-certification.
Credential: State certification after passing a two-part competency exam (written + skills demonstration). CNA credentials are not portable across all states — some require retesting when you move.
Why CNA matters as a stepping stone: Working as a CNA while completing nursing prerequisites gives you clinical experience that strengthens ADN and BSN applications. Many community college ADN programs score applications based partly on healthcare work experience. See the CNA-to-RN bridge programs guide for how to build on this credential.
LPN/LVN programs: high school diploma, no college science required
Licensed Practical Nurse (LPN) programs — called Licensed Vocational Nurse (LVN) programs in Texas and California — are the most accessible route to a licensed nursing credential. The vast majority require only a high school diploma or GED plus passing a basic academic assessment, with no college-level science prerequisites.
Typical LPN admission requirements:
- High school diploma or GED
- Minimum age of 17 or 18 (varies by state)
- Basic reading and math assessment (not the TEAS or other nursing-specific entrance exams)
- Health clearance (immunizations, background check, drug screen — covered in more detail below)
- CPR certification (BLS for Healthcare Providers)
What distinguishes LPN programs from CNA:
- LPN training includes pharmacology, medical-surgical nursing, pediatric nursing, and maternal-newborn concepts
- LPN graduates take the NCLEX-PN exam and practice under physician or RN supervision
- LPN scope of practice allows medication administration, wound care, IV therapy (state-dependent), and direct patient care responsibilities that CNAs cannot perform
Program length: 12–18 months at community colleges and vocational/technical schools.
Cost: $8,000–$25,000 for the full program. Community college LPN programs in many states cost significantly less than private vocational schools.
LPN as a long-term path: LPN is not a dead end. LPN-to-RN bridge programs at community colleges and online institutions are specifically designed for practicing LPNs who want to earn an ADN or RN license without repeating year one of nursing school. Many programs accept clinical work history and prior nursing credits. See the LPN-to-RN bridge programs guide for details.
ADN programs: some accept concurrent enrollment
Associate Degree in Nursing (ADN) programs at community colleges are the standard two-year path to an RN license. Most programs list Anatomy & Physiology I and II, Microbiology, and Chemistry as prerequisites that must be completed before enrollment in the nursing component.
However, a meaningful subset of community college ADN programs allow concurrent enrollment — you begin the nursing program and complete science prerequisites simultaneously during your first semester or year.
How concurrent enrollment works:
Programs that permit concurrent enrollment structure the first year so that science coursework and introductory nursing courses overlap. You are formally enrolled in the nursing program from day one; you are not waiting on a waitlist while finishing prerequisites.
This approach has advantages and risks:
| Factor | Concurrent enrollment | Standard (prerequisites first) |
|---|---|---|
| Time to start | Immediately | 1–2 years of prerequisites first |
| Workload | Higher — science + nursing simultaneously | Lighter in year one |
| Academic risk | Higher failure rate if underprepared in science | Lower — you enter with foundation already built |
| Cost | No extra semesters sitting on a waitlist | May pay for an extra year of science courses |
How to find concurrent enrollment programs:
- Search your state’s community college system websites for “concurrent prerequisites” or “co-requisite enrollment” in nursing program admissions pages
- Contact the nursing department directly and ask whether any prerequisites can be taken during the first nursing semester
- Review the curriculum sequence listed in the program handbook — programs that allow concurrent enrollment will list science courses as co-requisites, not prerequisites
Not every state or community college system permits this structure. California’s California Community College Chancellor’s Office, for example, has pushed corequisite remediation broadly, but nursing programs vary in implementation.
Accelerated BSN: requires a bachelor’s degree, not nursing prerequisites
Accelerated BSN (ABSN) programs are built for career-changers who hold a bachelor’s degree in a non-nursing field. The key insight: most ABSN programs require a prior degree and general education courses, but do NOT require you to have already completed nursing-specific science prerequisites.
Typical ABSN prerequisites — what they require in practice:
- Bachelor’s degree in any field (verified transcript)
- Statistics (one college-level course)
- Anatomy & Physiology (sometimes waived or offered as a bridge course)
- Microbiology (sometimes waived at accelerated programs that front-load it in year one)
- GPA of 2.75–3.0 on prior degree
- A few programs require shadowing or healthcare experience hours
Many ABSN programs bundle introductory science content into the first module of the accelerated curriculum, so that students from humanities or business backgrounds can enter without having completed a full year of college biology.
This makes ABSN one of the fastest routes to RN licensure for career-changers who have a degree but no nursing background.
Program length: 12–20 months intensive, full-time study.
Key limitation: ABSN programs are highly competitive and more expensive than community college ADN programs, typically costing $40,000–$90,000. They are not lower-barrier in terms of selectivity — they simply have different barriers.
Direct-entry MSN: any bachelor’s degree, no nursing background required
Direct-entry MSN (Master of Science in Nursing) programs accept applicants who hold a bachelor’s degree in any field and want to enter nursing at the graduate level. No nursing prerequisites, no prior clinical experience required at most programs.
These are two-stage programs. The first portion leads to RN licensure (equivalent in content to a BSN). The second portion completes the MSN and prepares you for an advanced practice role (NP, CNS, or CNM).
Typical admission requirements:
- Bachelor’s degree (any major, accredited institution)
- GPA of 3.0 or higher on prior degree
- GRE scores (required at some programs, waived at others post-pandemic)
- Personal statement and letters of recommendation
- Healthcare shadowing or volunteer hours (varies by program)
Timeline: 2–3 years full-time.
Program examples: Yale School of Nursing, Georgetown University, Johns Hopkins, Vanderbilt, and many public university nursing schools offer direct-entry MSN tracks. State university systems often have lower-cost versions of the same pathway.
Cost and ROI: These programs are expensive — $60,000–$120,000 — but they lead directly to NP or other advanced practice credentials. For candidates with strong undergraduate records and a clear NP career goal, the direct-entry MSN removes two years of intermediate steps (prerequisites + BSN) by rolling them together.
Online RN programs with flexible entry
Some online nursing programs operate with open or rolling enrollment and do not require all prerequisites to be completed before starting. These programs are distinct from traditional fully-online ADN programs (which typically mirror community college prerequisites):
RN-to-BSN completion programs: For already-licensed RNs only. If you have an RN license from an ADN, you can enter most of these programs with a 2.0 GPA and no additional prerequisites. Acceptance rates run 85–100%. WGU, Western Governors University, and Chamberlain University are examples.
Pre-licensure online ADN/BSN programs: A smaller category, these programs are for students who are not yet licensed. They typically require the same prerequisites as in-person ADN programs. However, a few online programs partner with local community colleges for laboratory coursework and allow co-enrollment in prerequisite science courses during the nursing program start.
What to look for when evaluating programs:
- ACEN or CCNE accreditation (required for your license to be recognized and for federal financial aid)
- State board approval in your state of intended licensure
- NCLEX pass rate published on the program’s website (state boards of nursing require this disclosure)
- Whether prerequisites are co-requisites or must be completed before the first nursing course begins
What “no prerequisites” means in practice
“No prerequisites” refers to college-level academic coursework. It does not mean no requirements at all. Every nursing program — regardless of type — imposes several non-academic requirements that are universal and non-negotiable:
Requirements that apply to all programs
Criminal background check: Required by every state for nursing licensure. Most programs run a check at admission, not just at graduation. Certain felony convictions, and some misdemeanors, can affect licensure eligibility. If you have a criminal record, research your state’s board of nursing rules before paying application fees. See the NCSBN’s criminal background check guidance and your state board’s published guidelines.
Drug screening: Standard at admission and often random during clinical placements. Clinical sites (hospitals, nursing homes, outpatient clinics) require it as a condition of allowing students on-site.
CPR certification: BLS for Healthcare Providers (American Heart Association) or equivalent. Must be current (renewed every two years) before clinical placements begin.
Immunizations and health clearance:
- MMR (measles, mumps, rubella) — two doses or confirmed immunity titer
- Hepatitis B series (or documented immunity)
- Varicella (chickenpox) — two doses or confirmed immunity
- Tdap (tetanus, diphtheria, pertussis) — within 10 years
- Annual influenza vaccine (required during flu season at most clinical sites)
- TB test (two-step PPD or QuantiFERON-TB Gold)
- Some programs require a recent physical examination
Health insurance: Many programs require proof of health insurance for clinical placements.
Age requirements: Most states require applicants to be at least 17 or 18 to sit for certification or licensure exams, regardless of when they complete the program.
None of these require prior academic coursework — but they do require time and sometimes cost to obtain before your first clinical day.
State-by-state variation
Nursing program requirements are set by individual programs, and those programs operate within rules set by each state’s Board of Nursing. This creates meaningful variation across states:
- LPN scope of practice differs by state. What an LPN can do in Texas is not identical to what an LPN can do in New York. Research your state’s Nurse Practice Act before choosing a program.
- CNA training hour requirements vary from 75 hours (federal minimum) to 175 hours (some states). The longer the required training, the longer the program.
- Criminal background check standards are set by state boards and vary significantly. Some states have published lists of disqualifying convictions; others evaluate on a case-by-case basis.
- Concurrent enrollment availability for ADN programs depends on whether your community college system allows co-requisite structures. Call the nursing admissions office directly and ask.
How to check your state’s rules:
- Find your state board of nursing at ncsbn.org (National Council of State Boards of Nursing)
- Look for “licensing requirements,” “criminal background,” and “approved nursing programs” sections
- Contact the admissions office at programs you are considering and ask directly: “Can any prerequisites be taken concurrently with the nursing program?”
Choosing the right starting point
The right entry point depends on how quickly you want to be working in clinical nursing and how far you want your career to go.
If you want to start working within 12 weeks: CNA is the only option. No prerequisites, low cost, immediate clinical exposure. It is a stepping stone, not a destination for most — but it pays while you complete prerequisites or bridge programs.
If you want a licensed nursing credential without college science courses: LPN/LVN programs are the practical answer. A high school diploma or GED is sufficient for admission at most programs. You graduate, pass the NCLEX-PN, and work as a licensed nurse. Bridge programs later extend your credential to RN if you choose.
If you have a non-nursing bachelor’s degree: ABSN or direct-entry MSN programs exist specifically for you. They remove the standard prerequisite wait by either waiving requirements or building them into the curriculum. Cost is higher than community college, but the time to licensure is competitive.
If you are considering ADN but don’t have prerequisites yet: Ask programs directly about concurrent enrollment. It is not widely advertised but is available at more programs than the standard admissions pages suggest. The easiest nursing schools to get into guide covers ADN program accessibility in more detail.
For context on what the programs you’re considering will eventually cost, see the nursing school cost guide. If your concern is GPA rather than prerequisites, the low-GPA nursing schools guide covers that separately.