What it is
Internal medicine physicians (internists) are experts in the diagnosis, treatment, and prevention of adult disease. They care for the whole adult patient — often complex, multi-system illness — as primary-care doctors, hospitalists, or the foundation for many subspecialties.
What you do
Internists manage chronic conditions, acute illness, and preventive care for adults in clinics and hospitals. Hospitalists focus on inpatient care; outpatient internists provide continuity primary care.
Training path & length
3-year residency after medical school. It's the gateway to a wide range of fellowships (1–3 years) that define subspecialties.
Fellowship subspecialties
Internal medicine leads to many fellowships, including: cardiology, gastroenterology, pulmonary & critical care, nephrology, endocrinology, infectious disease, rheumatology, hematology & oncology, and geriatrics.
Pay & job outlook
Physicians are among the highest-paid professionals. The U.S. Bureau of Labor Statistics reports a median wage of $275,930 for physicians and surgeons (May 2025), with employment projected to grow about 4% from 2025 to 2035 and ~22,100 openings per year. Pay varies widely by specialty — procedural and surgical fields generally earn more, primary-care and pediatric fields less.
General internists earn near the physician median; subspecialties like cardiology (BLS: ~$454,940) earn well above it.
How to get there
Become a physician first: earn an MD or DO, then match into this residency through the national match. Licensure requires completing residency and passing the board exams.
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Key facts
- Residency3 years
- TreatsAdults (diagnosis, chronic & acute care)
- RolesPrimary care, hospitalist, subspecialist
- FellowshipsCardiology, GI, pulmonary/CC, nephrology, and more
- EntryMD or DO via the match