Illinois College of Osteopathic Medicine prerequisites

2 semesters · 8 credits · lab

Two semesters with lab. The single most universal prerequisite: essentially every MD and DO program asks for it, and it is the foundation the MCAT assumes.

2 semesters · 8 credits · lab

Two semesters with lab. Take it early: organic chemistry, biochemistry, and most upper-division biology all sit behind it, so a late start pushes the whole sequence past your MCAT date.

2 semesters · 8 credits · lab

Two semesters with lab at most schools. A meaningful and growing minority accept one semester of organic plus one of biochemistry. Do not drop the second semester on that assumption until you have checked the schools you actually want.

1 semester · 3 credits

One semester, lab rarely required. Roughly two thirds of schools require it outright and the MCAT tests it heavily, so treat it as required even where it technically is not, and take it before you sit the exam.

2 semesters · 8 credits · lab

Two semesters with lab. Algebra-based is accepted almost everywhere; take the calculus-based sequence only if your major needs it or a target school names it.

2 semesters · 6 credits

Two semesters of English or writing-intensive coursework. Many schools accept writing-intensive courses from any department, but a few name English specifically. If your writing credits come from elsewhere, confirm before you count them.

1 semester · 3 credits

One semester. Most schools with a math requirement accept statistics or calculus; statistics is the more widely accepted of the two and the more useful for reading clinical research, so the baseline tracks it here. If a target school names calculus, its own requirements will say so.

1 semester · 3 credits

One semester. Required outright at a minority of schools (several of them highly selective) and accepted in place of statistics at most of the rest. Take it if calculus is already in your major's path.

1 semester · 3 credits

One semester. A minority of schools require it, but a quarter of the MCAT is psychological and social foundations: this is the cheapest points on the exam.

1 semester · 3 credits

One semester. Same reasoning as psychology: required by fewer schools, tested directly on the MCAT.

1 semester · 3 credits

One semester. Required by a small number of schools and a common way to fill the upper-division science coursework that strengthens a science GPA.

150+ hours

Almost no school publishes a number, but admitted applicants typically report a few hundred hours. 150 is the point where you can speak about patient care from experience rather than in the abstract; sustained hours over years read better than a summer sprint.

50+ hours

Most medical schools ask for 50+ hours and list it as recommended.

No hours are published, but IllinoisCOM requires two letters and one of them must be 'one letter from a physician (preferably an osteopathic physician)'. That makes physician time non-optional, with a DO preferred. Watch the expiry rule too: letters must be written within two years of the date you apply.

150+ hours

Service with no medical angle. Committees are reading for a habit, not a total, so one commitment held for two years beats five one-off events.

100+ hours

Effectively expected at research-heavy MD programs and genuinely optional at many DO and community-focused schools. If research is not your path, put those hours into clinical work and say so clearly rather than padding a semester in a lab.

No published minimum

"One letter from a pre-medical source; this can be from an advisor, a composite evaluation, or evaluations from a committee."

No published minimum

The stated fallback for the pre-medical source letter: "if a pre-med source is not available, a letter from a science faculty member or advisor may be submitted."

No published minimum

"Applicants must submit two letters of recommendation... one letter from a physician (preferably an osteopathic physician)." With only two letters required, the physician letter is half the file, and no hours are published. This is what makes physician time non-optional. Letters "must be written within two years of the date of application to IllinoisCOM."

No published minimum

"Preferably an osteopathic physician": a preference inside a required physician letter, so an MD satisfies the requirement but a DO satisfies it better.