For an international medical graduate, the letters of recommendation that carry the most weight are usually the ones written by US physicians who watched you work. Not the most senior name you can reach, and not a letter from your home institution, however strong. Programmes reading an IMG application are trying to answer one question the scores cannot: will this person function well in a US clinical team? A supervisor who has seen you do exactly that is the best answer available, and getting that letter takes planning months before you apply.
Why US letters carry extra weight for IMGs
Programme directors know US medical schools. They know how clerkships are graded, what a strong evaluation looks like and how to read a letter from a familiar institution. They know far less about your home school, its grading or its hospitals.
A letter from a US physician bridges that gap. It describes your work in terms the reader already understands, in the setting you are applying to work in. That is why letters from home are valuable for showing your background and character, but rarely substitute for a US letter.
Detail beats prestige
A common mistake is chasing the most famous name available: a department chair, a well-known researcher, someone with a title that looks good on paper. If that person barely knows you, the letter will be short and generic, and readers can tell.
The strongest letters are specific. They describe a patient you managed, a presentation you gave, how you handled feedback, how you compared with residents or students the writer has supervised. Only someone who worked with you closely can write that. A detailed letter from an attending who supervised you for weeks beats a brief one from a chair who met you twice.
Hands-on experience makes stronger letters
The type of US clinical experience you have shapes the letters you can get. In an observership, you watch but do not examine patients, write notes or contribute to decisions. The writer can describe your curiosity, punctuality and professionalism, which is worth something, but not your clinical reasoning.
Hands-on roles, such as externships or electives taken as a student, let the writer see you take histories, present patients and propose plans. That is the material a persuasive letter is built from. If you are choosing between experiences, the potential for a strong letter is a good reason to prefer the hands-on option, even at a less well-known institution.
How to earn a letter during a rotation
The letter is mostly decided before you ask for it. During the rotation:
Make your work visible to one supervisor. Rotating between many attendings makes it harder for any of them to know you well. Where possible, work consistently with one or two.
Ask for feedback early. Asking in the first week what you could do better, and then visibly acting on it, gives the writer a story to tell.
Do the unglamorous things well. Arrive prepared, follow up on your patients, present concisely. Supervisors notice reliability more than brilliance.
Learn the local conventions. How presentations are structured, how notes are written, how the team communicates. Adapting quickly is exactly what programmes want reassurance about.
When and how to ask
Ask near the end of the rotation, when your work is fresh, rather than months later. Ask directly whether they feel able to write you a strong letter. That question gives them a graceful way to decline if they cannot, which is far better than receiving a lukewarm one.
Then make it easy. Send a short summary of what you did on the rotation, the patients or cases they might remember, your specialty and your goals, along with your CV and a personal statement draft if you have one. Writers are busy, and a letter is much more likely to be specific if you have reminded them of the specifics.
How letters reach programmes
Letters for residency applications are uploaded by the writer through the ERAS letter portal, not sent by you. You request the letter in your application account and the writer receives the instructions to upload it. You will be asked whether you waive your right to see the letter; most applicants do, because programmes tend to trust letters the applicant has not read.
Follow up politely if the deadline approaches and a letter has not arrived. Writers forget, and a reminder is expected.
Balancing your set of letters
Check each programme’s requirements, because some ask for particular letters, such as one from your intended specialty or from a department chair. Beyond that, a sensible set leans on US clinical letters, includes at least one from your intended specialty where possible, and uses a home letter where it adds something the US letters cannot, such as a long view of your development.
Plan backwards from the application
Because strong letters come from hands-on US experience, and that experience takes time to arrange, letters belong in your timeline long before the application opens. Work out when you will complete your US clinical rotations, make sure at least one falls early enough for the writer to submit before programmes start reviewing, and treat every rotation as a possible letter from its first day.
Frequently asked questions
Do IMGs need US letters of recommendation for the Match?
They are not a formal requirement, but in practice they matter a great deal. Programmes find it hard to judge clinical work done in an unfamiliar system, and a US physician who supervised you gives them a reference point they trust. Check each programme's requirements, as some specify the type of letters they want.
Can an observership get me a letter of recommendation?
Sometimes, but it is usually weaker. In an observership you do not examine patients or contribute to decisions, so the writer can comment mainly on your engagement and professionalism. Hands-on experience lets them describe your clinical reasoning, which is what programmes want to read about.
Should I waive my right to see my letters?
Most applicants do. Programmes generally give more weight to letters the applicant has not seen, because they read as more candid. Waiving is the normal choice unless you have a specific reason not to.