My school doesn’t offer a committee letter so I spent a while compiling (almost) every MD school’s letter of recommendation requirements. Most information here was copied from each school’s website in June 2018. A couple came from emails with admissions offices and I’ve tried to cite those accordingly. If you’ve found this page I hope it saves you some time!

 

School	Quote
Harvard	At least two (2) letters should be from professors in the sciences with whom they have taken classes. At least one (1) letter should be written by a professor who is not in the sciences.
Johns Hopkins	Two (2) letters of recommendation from science faculty One (1) letter from non-science faculty
Stanford	We request at least three  but no more than six  complete letters of recommendation from persons who know you well enough to evaluate your scholarly potential and promise as a physician and describe your personal qualities. Professors, instructors, thesis advisors or supervisors of special projects, clinical, volunteer or employment activities usually provide the most informative evaluations
NYU	a premedical committee appraisal letter (preferred) or two letters from professors who taught you in courses (at least one in science), plus other letters you wish to submit
UCSF	We ask applicants who pass the preliminary review to submit 3-5 letters of recommendation, including at least two letters from your instructors. We will accept only one set of letters, regardless of the number of programs for which you are applying. Please be aware that UCSF is participating in the AMCAS letter service, and as such applicants are required to submit their letters of recommendation via AMCAS.
Mayo	our recommendations should be written by people who know you well and whose opinions have bearing on the likelihood of your success in medical school. At least one of the recommendations should be from a member of the science faculty. A letter from a teaching assistant is acceptable. A maximum of 10 letters are accepted.
University of Pennsylvania (Perleman)	A minimum of three (3) letters from faculty members who know the applicant well; at least one must come from a science faculty member with whom the applicant has taken courses.
WashU St. Louis	Letters of evaluation/recommendation from people who know you well such as teachers, research mentor(s) or supervisors that are submitted individually. Three letters are required. If you choose this option, please enter the letter writers’ names on the Supplemental Application.
UCLA	Two letters of recommendation, one from a science professor (math, biology, chemistry and other science course) and one from a premedical advisor or employer.
Duke	Each applicant must submit four (4) letters of recommendation, two of which must be from science faculty
Washington	Submit a minimum of three and up to six letters from writers who can speak to one or more of the following: your academic ability, commitment to service, leadership potential, clinical or research experiences, interpersonal skills, ability to function on a team, and/or potential as a physician.  The collection of letters should provide a balanced and well-rounded view of your candidacy for medicine. Letters of recommendation from current employers may be advantageous.
Columbia	We welcome letters of recommendation from individuals and premedical advisory groups with genuine knowledge of applicants and their capabilities, who can provide more than routine praise. Our Admissions Committee requires three letters of recommendation and accepts up to seven. One must come from a science faculty member, teacher, or research mentor.
Yale	These letters should come from individuals who are in a position to comment knowledgeably on your accomplishments, abilities, experience, and/or personal qualifications. They may come from those who have taught you or worked with you in undergraduate or graduate school classes, in research settings, clinical settings, extracurricular or community service activities, professional settings, or other contexts. It is helpful to have at least one of the letters from someone in the sciences, but this is not mandatory.
University of Pittsburgh	We prefer three letters of recommendation from professors or important mentors (such as research mentors).  The best are letters from those who know the applicant well and can comment on the above competencies.  Supplemental recommendations from the supervisors or peers of extracurricular activities or work positions are encouraged as well.
Baylor	If there is no health professions advisor, advisory committee, or office of advising premedical students at your school, evaluations from three individuals who are qualified to evaluate you personally and academically will be considered.
Michigan	We have no specific requirements regarding how you select these individuals.
Vanderbilt	Vanderbilt University supports the movement for letters to cover the AAMC Guidelines (https://www.aamc.org/download/349990/data/lettersguidelinesbrochure.pdf) and encourages applicants to solicit letters from evaluators who can address competencies. If you have advanced degrees or at least one year of postgraduate full-time employment, it is advisable to ask your supervisor at work or a member of the graduate faculty to send a letter of recommendation.
Chicago (Pritzker)	Submit three or more letters of recommendation from individuals Three individual letters will fulfill the requirement. There is no maximum. Please try to arrange to have all of your letters arrive at approximately the same time. Your application will be considered complete when your first three letters have arrived and will be reviewed by the admissions committee at that time. Receipt of additional letters of recommendation after that time will not re-open your file for a second review. At least 2 letters should be written by individuals who can speak specifically to your potential for success in a rigorous science curriculum
Mount Sinai	We accept individual recommendations from professors who taught you (one science and one non-science) if your school does not have a premed committee.
Northwestern	Your letters may be written by your college's pre-medical advisory committee, or they may come from three faculty members, at  least two of whom are science faculty members , who have taught you.
Cornell	or two letters from others such as teachers and supervisors in work, service or research
UCSD	A minimum of three letters are required from individuals who can provide a well considered evaluation of your qualifications for the medical profession. We will also accept a single "Committee Letter" compiled by your undergraduate school's pre-med advising office in lieu of the three letter minimum. We accept a maximum of five letters. Letters from faculty at your four-year undergraduate institution are encouraged but not required. Letters can come from any source, including but not limited to: course instructors, research mentors, clinical faculty, work supervisors, non-faculty practicing physicians.
UNC Chapel Hill	We require at least two letters of recommendation from professors who know you well and have taught you in a formal classroom setting. We suggest one of the two letters should be from a professor in your most recent major or degree-granting department, and the other may be from any professor of your choice
Emory	Three letters of recommendation from individuals, two of whom should be individuals familiar with your knowledge in the sciences
Case Western	3-5 Letters of Recommendations. At least two should be from science advisors/professors; or
Texas - Southwestern	unknown
UVA	or if this service is not available, a minimum of two letters, preferably from science professors or the equivalent
Wisconsin (Madison)	Four individual letters: three academic letters of recommendation from faculty members and a fourth nonacademic letter from someone other than a faculty or family member or personal friend.
Boston University	If no such institutional letter is available, the applicant should explain this on the BUSM supplemental application and substitute a minimum of three individual letters, two of which must be from a professor who has taught you in Biology, Chemistry or Physics.  The third letter can be from a person of your choice and need not be academic in nature.
OHSU	Letters from  three  college or university teaching faculty from any department. It is recommended that at least one be from a science department teaching faculty member.
Maryland	If your school does not have a Premedical Advisory Committee, your letters of recommendation must come from three of your undergraduate and/or graduate school faculty. At least two letters must come from science faculty and one from non-science faculty.
Ohio State University	Academic Letters: You should submit two letters from professors in any courses who have taught you and assigned a grade for credit in the course; at least one should be a science course. A premedical committee composite letter satisfies this requirement.
University of Southern California (Keck)	he Keck School of Medicine of USC participates in the AMCAS Letter of Recommendation Service. A committee letter is sufficient. Alternatively, 2 or 3 letters from professors, PI’s or work experience are acceptable. Do not send more than 3 letters!
Brown	or a minimum of  three  individual letters of recommendation from your premedical or research adviser, professors at the institution where you last studied, or other individuals of your choice (maximum of six).
University of Iowa	We encourage applicants to provide letters from a variety of individuals qualified to assess personal (as well as academic) qualities, such as work ethic, reliability, communication skills, leadership, altruism, compassion, and motivation for medicine. Letters of recommendation from family members are discouraged.
University of Alabama	Two letters from science faculty who have taught you One letter from other faculty or an individual who can provide an in-depth evaluation and recommendation
Rochester	Letters of recommendation submitted on official letterhead may be a composite letter or pre-health advisory committee letter from your school, or a minimum of 3 individual letters
Colarado	letters can come from a faculty member, clinical experience, research experience, or a current job as the letter transmits cogent information about the applicant’s work. Obtaining a letter from the employer who you are working with during the application year is very important.
Einstein	must have at least  two  letters of recommendation from faculty members who have taught the applicant in the classroom setting
UC - Davis	unknown
Utah	We recommend that applicants provide at least one  ACADEMIC  letter where the letter writer can speak to your academic ability and/or intellectual curiosity.  This letter does not necessarily need to be from someone who directly taught you.  It can be from a professor you did research with or a professor that you worked with as a teaching assistant.
Florida	The University of Florida College of Medicine requires a minimum of 3 letters. A specific distribution of recommenders is no longer required.
University of Cincinnati	(3) letters from individuals who can properly evaluate your strengths as an applicant and future clinician. If you choose to submit three (3) letters, we suggest you request two (2) letters from individuals who can evaluate your performance in science coursework or medical settings.
Dartmouth	If your school has no premedical committee, at least two individual letters are required. To expedite the process, candidates are urged to have letters prepared as early in the process as possible. All letters must be received through AMCAS using one of their acceptable forms of receipt.
University of Massachusetts	Two letters from prerequisite science instructors may be accepted in the event the applicant is unable to provide a committee letter. We may consider letters from academic mentors or advisors, preferably in the physical or biomedical sciences.
Cal Irvine	We recommend that at least two of the letters be from senior professors who can evaluate your academic abilities.
Georgetown	You may use your discretion when selecting letter-writers, however, it is recommended that you submit a balance of academic, clinical, and service recommendation letters.  ​
Minnesota	Your letter writers should not only discuss your academic potential, but they should also discuss what they know about you outside the classroom. This can include your character, work ethic, interests, and additional aspects of your personality. Remember, the letters should speak about you personally and not just at a peripheral level.
Indiana University	The admissions committee recommends that applicants submit two academic letters (one science and one nonscience) and a personal letter.
University of Miami (Miller)	Three letters from individual faculty members, two of whom must be science faculty who have taught you.
Illinios	Premedical committee evaluation OR three letters from instructors (any field of study) from whom the candidate has taken courses
Wake Forest	If you are a current undergraduate student and your school does not have a Premedical Committee we will accept two letters of evaluation, with at least one from a science faculty member.
USF	REQUIRED that a minimum of two (2) letters come from science faculty* who have taught you in a formal course
Thomas Jefferson	If individual letters are sent, we prefer one biology, one chemistry, one physics and one humanities.
University of Connecticut	For applicants from schools that do not provide a composite advisory committee letter, the applicant must provide a minimum of three letters from individuals familiar with their academic history.
Tufts	Three individual letters (we do not specify the nature of the authors) that will arrive at the admissions office separately.
Temple	If submitting a compilation packet or individual letters, we prefer two (2) letters from professors with whom you completed course work from the AMCAS course classification of Biology, Chemistry, or Physics.
George Washington	Minimum of three letters from individuals, at least one of which must be from science faculty familiar with your academic work.
MU South Carolina	Letters from previous supervisors may be submitted, but at least two (2) letters of recommendation from college professors are also required.
Nebraska	Two letters of recommendation from undergraduate faculty members are preferred; one in the pre-medical science area
Kansas	We request letters from a variety of sources --  faculty, employers, supervisors, or other persons who know you well and can be regarded as objective evaluators.
University of Vermont	Two letters from professors in the sciences with whom you have taken classes, and One additional letter from a non-science professor with whom you have taken a class.
Rutgers	f your school does not have a pre-medical committee, a minimum of (2) science  and  (1) non-science recommendation letters from faculty who are able to assess your candidacy for medical school are required.
VCU	Letters may be authored by individuals from an academic, clinical, employment, research, or volunteer setting. People who know you well and who can attest to your character and abilities based upon their personal experience with you will be the most meaningful.
Medical College of Wisconsin	Two individual letters from classroom professors, one of whom must have taught biology, chemistry, physics, or a comparable science discipline.
University of Tennessee	you will need to submit three (3) letters of reference with at least two (2) from science professors and one non-science reference letter.
Louisville	If your college/university does not have a pre-med committee, we require 3  academic  letters of recommendation
Wayne State	with at least two from faculty members. One letter must have been written within the past 12 months.
Missouri	We require three individual letters from professors who taught and issued you a grade. It is strongly recommended that at least two of the three be from science faculty.
Oklahoma	three faculty letters. Our definition of a faculty letter is one written by a college/university faculty member who has instructed you at the college/university level
Drexel	If this isn't possible, students should ask three individuals who hold college-level academic appointments to send letters of recommendation. Two of these should be from science faculty and one from a faculty member in a non-science discipline.
UCF	three individual faculty letters – two letters from basic science faculty, and one from a non-science faculty member, or one Pre-Med/Pre-Professional Composite Committee Letter two character letters – these letters should be from those who can tell us about “who” you are. Authors may be those who have been your supervisor, friend, neighbor, someone you have volunteered with or shadowed, someone from an organization or club that you belong to, clergy, etc. One of these two letters may be from an academic peer.
Eastern Virginia	Otherwise, you may submit 3 individual letters, including: two letters from natural and physical sciences faculty and one letter from a non-science facult
Michigan State	One letter must be from a basic science or medical science professor who can critically evaluate your academic potential, maturity, strengths and weaknesses, and the difficulty of coursework, if applicable. Comments that expand beyond what may be reflected by your grade in the class or address any special achievements or attributes are desirable. One letter must address personal experiences and characteristics that will help us to develop an overall portrait of you. A letter based upon direct interaction with you and addressing qualities such as maturity, empathy, character, reliability, interpersonal skills, and any special attributes or experiences will be the most helpful.
University of Toledo	Often letters are from three (3) faculty members with whom you have studied. Meaningful letters are typically from individuals who can address features of your personality, history, and motivation in addition to your academic accomplishments.  Letters from family members and family friends are strongly discouraged.
Wright State University	you may substitute letters from three faculty members who had you in class, including at least two letters from science faculty or those who you feel can best attest to your ability to meet the required competencies for medical school
FSU	It is preferred that applicants submit two letters from science faculty who have taught the applicant, and one letter from any other non-science faculty member who has taught the applicant.
FAU	Two of these letters must be written by science faculty members while the third can be written by either a science or non-science faculty member.
UK	Individual letter: If there is no committee or advisor, the applicant is required to provide three letters of recommendation, at least one of the three recommendations from a faculty member in the major area of concentration and at least one from a science area.
Penn State	At least two letters from faculty in science disciplines At least one letter from faculty in a non-science discipline At least one remaining letter from college faculty, community leader, employer, or others in positions of responsibility that know the applicant well
Oakland	We receive many questions about who should write letters of recommendation.  We highly recommend you select writers who know you well and can speak to your qualifications for entering the field of medicine.  It is a good idea to include at least one faculty member who has gotten to know you during the course of your studies.
University of Arizona - Phx	At least one letter from a recent clinical experience is highly recommended
Tulane	A total of  three  letters of recommendation. Two must be from professors/ professionals of a science background, and the third letter can be from anyone of your choice.
Virginia Tech	If providing traditional letters of recommendation via AMCAS Letters Service, we require a minimum of three letters but recommend four to seven letters with at least one coming from a science or math faculty member.
FIU	two from science faculty (biology, chemistry, physics, and math) and one from any other faculty member who has taught the applicant.
Western Michigan	Letters must come from individuals with firsthand knowledge of the applicant’s qualifications, skills, attributes and values by direct observation and who can comment on academic achievement as well as personal qualities including work ethic and motivation for a medical career. Two of the letters are recommended to be from faculty members who have been the applicant's undergraduate or graduate instructors or mentors, or employment supervisors in the case of non-traditional applicants
Mercer	We require at least one letter to be from a science faculty member that has taught the applicant, and we recommend at least one letter from a physician or health care professional the applicant has shadowed or worked with.
Loyola ¹	We strongly recommend at least one letter from someone who has taught you in a science class. We suggest two science faculty letters and one non-science faculty letter.
Creighton	Three letters from faculty members – two science and one non-science
NEOMED (Northeast Ohio Medical University)	Letters of evaluation are neither required nor accepted for this program.
California University	All applicants must submit three (3) letters of recommendation through the American Medical College Application System (AMCAS).
Rosalind Franklin
Albany	Submission of letters of recommendation. The Admissions Committee prefers a composite letter from a premedical advisor or committee. For students attending schools that do not provide this service, individual letters from faculty may be substituted.
Cal Northstate	CNUCOM requires three letters of recommendation, including one (1) from a professor in the sciences (i.e. Biology, Chemistry, Physics), one (1) from a professor not in the sciences, and one (1) from someone who has known the applicant for a substantial amount of time (e.g. research principal investigator, shadowed physician, volunteer coordinator, organization leader, work supervisor). Applicants are encouraged to submit two (2) additional letters from any source
Carle Illinios	2. If the primary college or university does not have a premedical committee, at least 3 individual letters of recommendation on official letterhead: 2 from individual professors with whom the applicant has taken classes or participated in research (at least 1 in STEM-science, technology, engineering or mathematics) and 1 letter from a non-academic individual (e.g. an advisor, a supervisor from a work or volunteer experience).
Hofstra	If your school does not have a Premedical Committee, or a considerable amount of time has passed since graduation, you may submit three individual letters of recommendation – two letters from individual professors (at least one in science), and one letter from a non-academic professional (included with AMCAS application). Applicants may submit more than three letters of recommendation through AMCAS, though we do not guarantee that all letters beyond the minimum requirement will be read.
Frank Netter	Four individual letters of your choosing from individuals who can assess yoursuitability and preparedness for both medical school and a career as a physician
Geisinger	or three evaluation/recommendation letters from faculty who are familiar with the applicant’s career goals and academic coursework.
Loma Linda	At least one of those recommendations must be from a science professor who has taught the applicant. It is suggested that the other references come from a physician whom you have shadowed, an employer, your pastor or other clergy, or a leader in your volunteering experiences.
New York Medical College	"...we will require 2 science and one non-science letters of recommendation from professors who have taught you in a class from which you have received academic credit, along with a letter from your major" (this information was via email, I could not find these requirements anywhere online)
Rush	Academic Letter: an individual who can critically evaluate your academic strengths and abilities, as well as your preparedness and suitability for a rigorous medical school curriculum. Non-Academic Letter: an individual who can insightfully address the personal strengths and attributes (e.g. resilience, dependability, social skills, cultural competence, service orientation) that you possess and the value this would bring to peers, the medical school class and as a successful future physician. Personal Letter: an individual who has an in-depth perspective of you; someone who has had substantial contact with you during the past 24 months.
St. Louis University	If your school does not have a committee, please request letters of evaluation from three of your college or university teachers. Be sure at least one of these individuals teaches science.
Nova	At least one of your letters should be from a professor that has taught you in a math or science course, and who can adequately speak to both your academic readiness and personal suitability for the pursuit and practice of medicine

 

¹  This information was from an email from Loyola on 7/26/2018