You’ve finished your USCE. You have three or four attendings who said, “I’d be happy to write for you.” Now you’re staring at MyERAS trying to decide which names go in.
Most IMGs pick by title. Department chair first, then the most senior attending, then whoever is left.
Now here’s the part almost nobody tells you: a program director can tell in one paragraph whether the writer actually watched you work. A famous name who met you twice loses to an attending who saw you present ten patients.
In the NRMP 2026 Program Director Survey, 86 percent of responding program directors said letters of recommendation in the specialty factor into who gets an interview, with a mean importance rating of 4.0 out of 5. Those figures come from survey responses, not from every residency program, but that mean rating is comparable to the one respondents gave Step 2 CK scores, which puts specialty letters in a similar tier for the programs that answered.
It matters more for you, because a US letter of recommendation for IMGs is often the only US clinical evidence in the file. No MSPE from a US school. No home program. Just the letter.
Your job here is simple: choose writers who can prove, in specific detail, that you perform like a US intern. Everything below is about how to find those people and how to ask.
Here’s the rule I give every IMG I mentor.
The best US letter of recommendation for IMGs comes from an attending physician in your target specialty who supervised you directly during a hands-on US clinical rotation for at least two to four weeks, and who can describe your clinical performance with examples. Title, fame and hospital brand come after that, not before.
This table ranks the writer types you’ll meet during USCE by what their letter can credibly say.
| Writer type | What the letter can prove | Weight for an IMG |
|---|---|---|
| Attending physician in your target specialty who supervised you daily | Clinical performance, reasoning, work ethic, how you compare to US students and interns | Highest. Get at least two of these. |
| Program director or clerkship director who worked with you | Same as above, plus a view on residency readiness | Very high, only if they truly observed you |
| Department chair or specialty faculty who saw you briefly | Professionalism, general impression | Medium. Title alone doesn’t carry it. |
| Attending in a different specialty who supervised you | Clinical performance, professionalism, communication skills | Medium to high as a third letter |
| Research mentor (US) | Academic evaluation, reliability, writing | Useful as one letter, never the core |
| Observership supervisor with no hands-on contact | Attendance, attitude, interest | Low. Use only if nothing stronger exists. |
The takeaway: the right question is never “who has the biggest title?” It’s “who watched me closest, longest, and in the specialty I’m applying to?”
A letter from a department chair who met you twice reads like this: “Dr. X was a pleasant and motivated observer who showed great interest in internal medicine.”
That sentence tells the program director one thing: this writer has nothing to say. Every PD has read ten thousand of those.
A letter from the attending who ran your team reads like this: “On day three, she caught a potassium of 6.1 that the night team had missed and had the ECG and calcium gluconate ordered before I arrived.”
One of those gets you an interview. The other gets you a glance.
Program directors read your letters looking for a few specific signals. Choose writers who can supply all four.
A strong letter covers:
A writer can only put these in if they saw them. So the choice of writer decides the content before a word is written.
Weak: “He is hardworking, dedicated and will make an excellent resident.”
Better: “He carried four patients independently by week two, presented on rounds without notes, and his admission notes needed fewer edits than most of our interns’.”
The first could describe anyone. The second could only describe you.
Letters are written about what the attending saw. Our USCE placements put you on a team where you present, write notes, and get watched, the specific sentences come from there.
ERAS lets you upload as many letters as you collect, but the AAMC caps what you can assign to any single program at four. Four is the maximum, not a requirement, so follow each specialty’s guidance and the program’s own requirements.
Four slots at most. Here’s how I’d spend them depending on where you stand.
| Your situation | Slot 1 | Slot 2 | Slot 3 | Slot 4 |
|---|---|---|---|---|
| Two or more US rotations in your specialty | US attending, target specialty | US attending, target specialty | US attending, any specialty, or PD who observed you | Strongest home country clinical letter |
| One US rotation in your specialty | US attending, target specialty | US attending from the same rotation if two supervised you | US attending, other specialty, or US research mentor | Home country letter from a senior clinician |
| US experience in a different specialty only | US attending who supervised you most | Home country letter in your target specialty | Second US letter (any) | Home country or research letter |
| Recent graduate, no US experience yet | Fix this first. Book USCE before you apply. |
The takeaway: at least two US letters, both from people who supervised you, and ideally both in the specialty you’re applying to.
Key Tip: Home country letters aren’t worthless. A detailed letter from a professor who taught you for two years beats a vague US observership letter. Keep one strong home letter and make the rest American.
“Letters in the specialty” is the exact phrase the NRMP uses in its survey, and PDs mean it literally. An internal medicine PD wants to read what an internist thought of you on an internal medicine service.
What specialty-specific means in practice:
Here’s a mistake I see all the time. An IMG does a surgery observership, a cardiology elective and a family medicine rotation, then applies to internal medicine with zero IM letters. The file reads like someone who hasn’t decided.
Key Takeaway: if you can only get one thing right, get two letters from attendings in the specialty you’re actually applying to.
You don’t find letter writers after the rotation. You find them during the first week.
Do this on every clinical rotation:
If you only do one thing here, make it this: ask the yes or no question. “Would you be able to write me a strong letter?” The word strong gives an honest attending permission to say no, and that saves you a slot.
Weak: “Can you write me a letter of recommendation?” sent by email three weeks after the rotation ended.
Better: “You supervised me for the full four weeks on the teaching service. Would you be comfortable writing a strong letter for my internal medicine application? I can send my CV and personal statement today.” Asked face to face on the second to last day.
The second version tells the writer what to write about, when, and for which specialty. Specifics, not vibes.
A sharp CV and a focused personal statement give your writer the language to describe you. We edit both before your letter requests go out, so every document tells one story.
This season the process changed, and a lot of attendings don’t know yet.
What’s new for 2027, per the AAMC Letter Writers FAQ:
What to tell your writer in one message:
“You’ll get an email from the AAMC Letter Writer Portal with a secure link. No account is needed. The letter should be on letterhead, signed, and uploaded as a PDF. My application is for internal medicine and I’ve attached my CV, personal statement and a short list of cases you saw me manage.”
Watch out: letterhead and signature aren’t an AAMC rule, and not every program director demands them, but they’re the professional standard. Both help establish that the letter is authentic and really came from the writer, so ask for them.
These are the rules that separate IMG files that get read from IMG files that get filtered.
If you haven’t mapped your whole application yet, our IMG roadmap to the US residency Match shows where letters sit in the sequence.
Each of these costs real applicants real interviews every year.
Sit down with your rotation list and answer these five questions in order.
Don’t do this on autopilot. If question one has no answer, the fix isn’t a weaker writer. The fix is one more rotation before you submit.
Score each potential writer from 0 to 2 on every line. Anyone under 7 goes to the backup list.
| Criterion | 0 points | 1 point | 2 points |
|---|---|---|---|
| Direct supervision | Met a few times | Supervised some days | Supervised me daily for 2+ weeks |
| Specialty match | Unrelated specialty | Related specialty | My target specialty |
| Hands-on contact | Observership only | Some patient contact | Presented, examined, wrote notes under them |
| Can compare me to US trainees | No | Maybe | Yes, and said so |
| Recency | 3+ years ago | 1 to 3 years ago | This cycle or last |
| Enthusiasm when asked | “Sure, I guess” | “Yes” | “Absolutely, happy to” with specifics |
Twelve is the ceiling. Anyone scoring 10 to 12 is a core writer. Anyone at 7 to 9 is a good third or fourth letter.
Weak way to use it: score everyone a 2 because you like them.
Better way to use it: score the chair the way a PD would. Direct supervision 0, hands-on 1, comparison 1. Suddenly the attending who ran your team at a community hospital is the obvious first letter, which was true all along.
Strong letters raise expectations, so the interview has to meet them. Our two-way mock interviews rehearse the answers you give and the questions you ask. See our residency interview preparation and the questions to ask a residency program director.
An attending physician in your target specialty who directly supervised you during hands-on US clinical experience for at least two weeks. That person can describe your clinical performance with examples and compare you to US students and interns, which is what program directors are reading for. A department chair or program director is a strong choice only if they personally worked with you. Title without observation produces a generic letter.
Up to four per program, which is the AAMC’s maximum rather than a required number. Follow each program’s stated requirements and any specialty-specific guidance. You can upload more than four in total and assign different sets to different programs. For most IMGs the strongest mix is two or three US letters from attendings who supervised you, with at least two in your specialty, plus one strong home country letter if you have one. Fewer specific letters beat more vague ones.
Not by rule, but in practice yes. A hands-on rotation lets the attending describe your history taking, presentations, notes and clinical reasoning. An observership letter can only confirm you attended and showed interest. If observerships are all you have, use the one where you interacted most and pair it with a strong home country clinical letter, then plan a hands-on rotation before the next cycle.
Yes, as a third or fourth letter. Program directors want to see letters in the specialty, and the 2026 NRMP Program Director Survey found that 86 percent of responding program directors weigh specialty letters when choosing interviewees. A detailed letter from a different specialty still proves professionalism, communication skills and work ethic. Just don’t let it crowd out a specialty letter you could have gotten.
Through the new AAMC Letter Writer Portal, which replaced the old LoR Portal this season. You add the writer in MyERAS, choose the specialty, and confirm the request. The writer then receives an email with a secure link and can submit as a guest without creating an account. Tell them to expect the email, to use letterhead and a signature, and to upload a PDF.
Choosing residency letter writers comes down to one rule: pick the attending who watched you closest, longest and in your specialty. Title is a tiebreaker, not a selection criterion. Two specific US letters from team attendings will outperform four polite letters from people with impressive signatures.
For IMGs, the letter has to do the job an MSPE does for US students. It has to say, with examples, that you work like a US intern. Only a writer who saw that can write it, so choose writers for what they saw, ask them early, and give them the packet that makes being specific easy.
A program director doesn’t want to know who recommended you. They want to know what you did.
Need help building your letter set and the documents that go with it? Book an ERAS review with IMG Helping Hands, and check your dates against our ERAS application timeline for IMGs.
Strong letters start with the right rotation and the right ask. IMG Helping Hands handles both ends, and the documents in between:
Articles published by IMG Helping Hands are prepared by our team using information from direct experience, publicly available resources, and educational references. AI tools may be used to assist with drafting, proofreading, and formatting; however, all content undergoes review and approval before publication.
The information provided is intended for educational purposes only. Requirements, policies, and processes may change over time. Readers should consult official sources for the most current information.
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