2026 Medical School Letters of Recommendation Guide

Medical school letters of recommendation carry more weight than most premeds realize. They are the one part of your application written by someone other than you, which means an admissions committee reads them through an entirely different lens. A lukewarm letter from someone who doesn’t know you well can quietly undermine every other strength in your file, whereas an enthusiastic letter from someone who does can tip a borderline decision in your favor.

This guide covers everything you need to know about the mechanics of letters of recommendation: who to ask, what to provide, how the submission process works, key deadlines, and answers to the most common questions we hear from applicants. It’s your complete operational reference.

If you want to go deeper on the strategy side, including how to build the relationships that produce strong letters, how to navigate the ask, and what actually separates a good letter from a great one in the eyes of admissions committees, read our companion piece: How to Get Strong Medical School Letters of Recommendation.

Why Letters of Recommendation Matter

Every other component of your application represents your own account of yourself. Your personal statement, your activity descriptions, and your secondary essays are all filtered through your own perspective. Admissions committees know this and read accordingly.

Letters of recommendation represent what a respected professional, with no personal stake in the outcome, thinks of you. When that person writes with specific, enthusiastic detail about your abilities and character, it carries a credibility that self-reported strengths can’t match.

The flip side is equally true. A vague, generic letter signals to adcoms that the writer either didn’t know you well enough or wasn’t particularly impressed by you. Clearly, this is the last thing you want from a letter of recommendation, as it’s no recommendation at all. This is not the part of your application to leave to chance.

Who to Ask for Letters of Recommendation

You’ll need a total of four to five letters with your medical school application, though this could vary by institution. Three academic letters must be written by undergraduate professors: two science letters and one non-science letter. The two remaining letters are from your extracurriculars, typically research and clinical experience.

Name recognition matters far less than depth of relationship. If you’ve only had a few conversations with someone, they won’t have much to say about you. Choose someone who can speak specifically and at length about your strengths. That letter will carry far more weight with an admissions committee than one from an impressive name who barely remembers you.

What to Provide to Letter of Recommendation Writers

The people you’re asking to write a letter are busy with their own careers and lives. It’s up to you to make the process as smooth and simple as possible. To do so, you need to provide several key pieces.

1. Submission instructions—Provide the writers of your letters of recommendation with all of the information they need to submit your letter to the submission service. Typically, this is the AMCAS Letter Service (for allopathic medical schools). Your letter writer won’t be submitting the letter to you; they will need to submit it directly to the service. Provide your letter writer with a Letter Request Form, available in the Main Menu of the Letters of Evaluation section. This form is a PDF generated in the AMCAS application for each of your designated letter authors, and it includes your mailing address, AAMC ID, the Letter ID, and information about how to submit letters to AMCAS. The Letter ID is a unique seven-digit code assigned to each letter entry on your AMCAS application. It must be provided to each letter writer in order to correctly match their letter with the letter entry you created in your application.
2. Updated CV—A comprehensive, organized, and professional summary of your academic, work, and extracurricular achievements to date.
3. Academic transcript.
4. Personal Statement—If available. Ideally, you should have at least a first draft of your personal statement prepared by the time you request a letter, but you may ask for academic letters early in your undergrad. If you don’t have a draft yet, write a brief summary of the reasons you are pursuing medicine, including what makes you a unique and qualified candidate.
5. MCAT score—This should be included in your CV, but it’s possible the letter writer will ask for a more verifiable source, such as a score printout. If you haven’t taken the MCAT, don’t delay asking for a letter just because you don’t have your MCAT score yet.
6. Submission deadline—Include the date in writing, either through email or printed with the materials you provide to the letter writer. Make sure the date is at least a week in advance of when you actually need to submit the letter. We recommend giving letter writers six to eight weeks to complete a letter after receiving the materials listed above. This means it’s important to start the process two to three months before you plan to submit your application.
7. A printed copy of materials—Even though the LOR submission process is completely digital, you may have letter writers who prefer to read and review physical materials. Ask them if they would like you to deliver or mail a printed packet of all of the above. It’s up to you to make this process as simple as possible for them, and a crisp manila envelope with all of your materials and submission information is a nice touch for those less digitally inclined.

AAMC also provides “Guidelines for Writing a Letter of Evaluation for a Medical School Applicant” that can be shared with letter writers. This is a helpful resource for applicants to share with their letter writers.

When to Ask for Letters of Recommendation

Start thinking about your letters of recommendation as soon as possible. It will take time to figure out who to ask and even longer to build strong relationships. If you have someone in mind, they may not have the time or feel they know you well enough, so make sure you have a backup plan and budget extra time in case a letter falls through.

Ask toward the end of your time working together, or shortly after the class concludes. Don’t wait months or years. You want the letter writer to keep you in mind so they can write a genuine letter full of fresh enthusiasm.

How to Ask for Letters of Recommendation

You can make the ask in person or by email; either works. Whichever you choose, be direct, briefly mention the nature of your relationship, and ask specifically if they are willing to write you a strong letter. That word matters more than you might think.

Give your letter writers as much time as possible. We recommend two to three months from the time they receive your materials. Set your deadline at least a week before you actually need the letter, and put a reminder in your calendar to follow up two weeks before the due date.

Common Mistakes to Avoid

Avoid the following common letter of recommendation mistakes.

• Asking someone who doesn’t know you well.
• Asking for a letter when you haven’t thoroughly prepared.
• Forgetting to provide the writer with the necessary materials.
• Asking people who don’t know you well enough to provide real insight into who you are.
• Not obtaining a variety of letters across science, non-science, and extracurriculars.
• Asking the professor of a class you scored below an A- in.
• Coming across as overly friendly or unprofessional when asking for a letter.
• Waiting too long after working with someone to ask for a letter.
• Getting a letter from someone who was reluctant when you asked.
• Not thinking about letters of recommendation early in your application preparation.

Letters of Recommendation FAQs

How many letters of recommendation do I need?

The medical school letter of recommendation requirements vary by school. Most schools require at least three letters, but some may ask for four or five. Make sure you check the specific requirements of each school you hope to apply to.

Since the number varies by school, we recommend that all applicants plan to have four to five letters of recommendation from science professors, non-science professors, and extracurriculars.

How do I submit letters of recommendation?

Your letter writers must submit their letter electronically through the AMCAS Letter Writer Application or Interfolio. You do not review or submit your own letters of recommendation.

You will need to provide each of your letter authors with submission information, including your AAMC ID and a unique seven-digit Letter ID. Each letter writer will be assigned an individual Letter ID when you add them to your AMCAS application, which is needed in order to upload your letter(s).

If you are applying through multiple services, such as AMCAS, TMDSAS, AACOMAS, etc., Interfolio acts as a go-between, so writers only need to upload once. They will still need their unique seven-digit Letter ID for your letter to be matched to your application. There is a small yearly fee to use Interfolio’s Dossier Deliver service.

Letters submitted through either process will be marked as received—immediately with AMCAS, or within three days with Interfolio. Contact your letter writer and ask them to submit the letter again, if a letter is not marked as received by the deadline you provided.

When are letters of recommendation due?

Include your letters with your medical school application. You can also add letters of recommendation up until you submit your secondary application, though you shouldn’t procrastinate. They are a key piece of your application that shouldn’t be left to the last minute. It takes time to request letters, and you need to give the letter writer enough time to complete them.

Secondary applications are due between July and January, but it’s best to submit yours, along with your letters, by the end of the summer.

What if a letter writer doesn’t submit a recommendation?

If a letter is not marked as received through the electronic portal you are using, contact your letter writer and ask them to submit the letter again.

In rare circumstances, a letter writer may disappear or stop responding. They are people, too, and emergencies happen. This is why it’s so important to have more letters planned than the bare minimum required for your application.

What if a potential letter writer says no?

If a potential letter writer says no, it means they do not feel they know you well enough, they’re already swamped with other requests, or they don’t have confidence in you. Whatever the reason, it’s important to move on and look for another option.

Even if they hesitate before saying yes, it may be better to find someone else. A poor or even lukewarm letter can jeopardize an otherwise excellent medical school application.

Who can write a letter besides professors?

You should have letters from two science professors and one non-science professor. In addition to professors, you may choose to ask a research PI or mentor, a physician you shadowed or worked closely with, or a volunteer activity supervisor.

You could also ask a TA or an employer for a letter of recommendation if they know you better than your other options. What’s most important is that you choose letter writers who know you very well and will speak highly of you.

Are extracurricular letters required?

While not required, we recommend securing letters of recommendation from extracurricular activities that were particularly significant. This may include research mentors or principal investigators (PI), physicians whom you shadowed, or leadership from other volunteer organizations. If appropriate, aim to secure a letter from each of your three most meaningful activities on your AMCAS.

Who shouldn’t give me a recommendation?

Don’t ask someone who is positively biased towards you, such as a friend or family member. Your letters should come from people who can provide an honest and impartial recommendation.

If the person you ask seems hesitant or unenthusiastic about submitting a letter of recommendation on your behalf, don’t push it; instead, find someone else. A poor or even neutral letter can jeopardize an otherwise excellent medical school application.

Can I add additional letters after I submit my application?

Yes, you can add additional letters after your application is submitted, but you cannot delete or change the letters your writers submit.

Although you can add letters of recommendation after submitting your application, we do not recommend it. Strong letters take time, so give your letter writers as much time as possible to compose thoughtful, detailed letters. You should choose four to five strong letter writers—having more won’t increase your chances, but it can dilute your positive recommendations with ones that aren’t as strong.

What types of letters does AMCAS accept?

AMCAS accepts Committee Letters, Letter Packets, and Individual Letters. Committee Letters are authored by a pre-health committee or pre-health advisor representing an evaluation of you by your institution. A Letter Packet is a set of letters assembled by your institution, often including a cover sheet from your prehealth committee or advisor. Individual Letters are written by, and represent, the opinions of one letter writer. All three letter types count as one letter entry.

Can I see my letter of recommendation?

Letters of recommendation are submitted confidentially, and you do not have access to them. Don’t ask letter writers what they have written, as they are under no obligation to show you. You should have absolute confidence that the person you ask knows you well and will speak highly of you.

Should I waive my right to view my letter of recommendation?

Yes. When you add a letter writer to your AMCAS application, you’ll be asked whether you waive your right to view the letter. Admissions committees can see whether you waived or not. Not doing so signals that you didn’t fully trust your letter writer, which raises an obvious question. If you weren’t confident they’d say something positive, why did you ask them? Waive it.

How should I thank letter writers?

Don’t forget about your letter writers as soon as your application is submitted. Send a thank-you email once they submit their letter, and consider sending them a handwritten card by mail when you are accepted to medical school.

What if you’re asked to write your own letter?

You may be asked to write your own letter of recommendation by people who don’t typically write medical school letters of recommendation, such as those who are not part of the medical school world.

While it does mean more work, it’s important to remember that this is as much a win as earning a strong letter of recommendation. If the person you asked to write you a strong letter asks you to write it yourself, it means you just secured a yes. You have a letter writer, even if you have to write the letter yourself. They want to support you, but you’ve got to do the legwork.

Follow the Right Timeline

Don’t leave anything to chance. This is the medical school application timeline you should follow, including key dates and an ideal month-by-month preparation schedule. Always remember: Applying early is one of the most essential medical school admission strategies.