How Old Can Prerequisites Be for CRNA School?

Updated September 2026

Short answer on how old can prerequisites be for CRNA school: it depends on the program, and most won't tell you. Of the 154 accredited programs in our database, only 30 publish an expiration at all. Of those 30, 13 say 5 years and 10 say 10 years. The other 124 stay silent.

So what does "expired" actually mean here?

Okay, let me back up, because I think a lot of people hear the word expired and picture their transcript getting shredded. That isn't it. A prerequisite expiration is a program saying: we want this class taken within the last X years, or we want you to take it again. That's the whole thing. It's a shelf life, not a deletion.

And the number varies more than you'd guess. In our database of 154 accredited programs, 13 of the ones who publish a limit say 5 years. 10 say 10 years. One says 3 years. One says 7 years. And 5 just say yes, they expire, without giving you a number at all, which is its own special kind of fun.

Now I am not saying 5 years is the standard. It's the most common published number in our data, and that's a different claim. 30 programs isn't a big enough pile to declare a rule for the whole profession. Treat it as a range to plan around, not a law.

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Why do most programs not publish an expiration date?

This is the part that makes people spiral, so let me say it plainly. Of our 154 accredited programs, 124 of them publish no expiration date anywhere. That does not mean old grades are fine. It means nobody wrote it down.

Sometimes the policy exists and lives in an admissions coordinator's head. Sometimes it's case by case. Sometimes the website has not been touched since 2019 and the person who wrote it left. Silence isn't a yes. Silence is a question you haven't asked yet.

So the move is boring and it works: email them and ask. Put your class, the year you took it, and the grade in one short paragraph, and ask if it meets their current requirement. It's your responsibility to reach out to the program and find out these answers yourself. Nobody is going to do that part for you, and honestly, the answer usually comes back within a week.

Does a 12-year-old C in biology disqualify me?

I want you to hear this part more than any other part. No, an old class doesn't disqualify you. But we need to separate two things that get mashed together.

Age is one problem. Grade is a completely different problem. An old B is usually fine. An old C in a core science is the problem regardless of age, and it would still be the problem if you took it last spring. The years are not what's hurting you there. The C is.

Which means the fix is the same fix it always was. Go down the list, see what you got a B minus or below in, retake those classes, retake them at a higher level. Age just pushes a couple of extra classes onto that list. It doesn't create a new rule.

And one thing worth knowing before you get excited about erasing the past: NursingCAS counts both attempts in your cumulative GPA. We broke that down in how NursingCAS calculates your GPA, and the which science classes to retake post owns the actual decision of what to sign up for. I'm not going to re-teach those here.

What do the published expiration windows actually look like?

Here's the whole picture, counted out of the 154 accredited programs we track. I like putting it in a table because it makes the silence obvious.

Look at that bottom row. 124 out of 154. That's the real story here, not the 5-year number everybody repeats on Reddit. Most of your target list has not told you anything, and you're the one who has to go get it.

How do I email a program about an old prerequisite?

People overthink this email so badly. It's four lines. You're not petitioning the Supreme Court.

Number one, say who you are in one sentence. ICU nurse, how many years, where. Number two, name the class, the school, the year, and the grade. Do not hide the grade, they're going to see it anyway. Number three, ask the actual question: does this still meet your prerequisite requirement, or would you want it retaken? Number four, ask if a higher-level course would satisfy it, because sometimes the answer is yes and that changes your whole plan.

So just to recap the four things: who you are, the class with the year and grade, does it still count, and does leveling up fix it. That's it. Send it to every program on your list, not just your favorite one, because the answers won't match and that's the point of asking.

And look, the way people get blindsided by this is they build a whole application plan around one program's policy and assume the other nine work the same way. They do not. Ask all of them.

When should I just retake it and stop asking?

There's a point where emailing 12 programs is costing you more than a class would, and I think a lot of go-getters miss that line.

If the class is a core science, you got a B minus or below, and it's more than 5 years old, I'd stop researching and go retake it. You're going to land on retake anyway, and you just bought yourself a recent grade that also fixes your science GPA. Two problems, one semester. That is a good trade.

If it's an old B or better and the program publishes nothing, ask first. Do not burn a semester and $600 on a class nobody required. And if you're staring at a list of programs with no idea which ones even apply to you, our prerequisite courses guide and the program pages are a decent place to start narrowing. You can also just throw your transcript at the free Transcript Analyzer and let it do the sorting.

I'm not saying you need to retake half your degree. Most people are looking at one or two classes, max. It feels bigger than it's at 2am on your phone.

Our Final Thoughts

That C from 12 years ago isn't the thing standing between you and CRNA school. A plan you never started is. Pick your five programs, send the four-line email to all five this week, and then go look at your science GPA, because that's the piece you can actually move. Old does not mean disqualified. Old means go ask, okay?