Internal Medicine vs Family Medicine: Training, Residency, and Career Paths for Medical Students

For medical students and aspiring physicians  exploring specialties, we want to provide a resource that compares internal medicine and family medicine through the lens of medical education, residency training, and long-term career pathways to help determine which specialty best aligns with their interests and overall goals.

After considering the 160+ specialties and subspecialties that you can pursue after graduating from medical school, you have narrowed it down to primary care, but you may still have the lingering question: What is the difference between family medicine and internal medicine?

“Internal medicine and family medicine can be very similar and there is a lot of overlap,” says Derek Anderson, MD, FAAFP Lead Clinical Chair and Clinical Chair, Family Medicine for American University of the Caribbean School of Medicine (AUC). We turned to Dr. Anderson, a practicing primary care team physician for the Louisiana State University athletic department, to help explain the scope and difference between family medicine and internal medicine.

“Both family medicine and internal medicine are primary care specialties,” he says. “Family physicians treat patients of all ages, from birth to death, and internal medicine doctors treat adults, 18 years or older.”

Training Pathways in Primary Care (Internal Medicine vs Family Medicine)

Both internal medicine and family medicine are primary care specialties, but they differ in how medical students are trained, the patient populations they focus on, and the clinical settings emphasized during residency.

Understanding these training pathways is an important step for medical students deciding which specialty best aligns with their interests and career goals.

Residency Length and Core Focus

The length of residency training for both is three years, but internal medicine focuses only on adults. To treat children, an internist needs pediatric training along with their internal medicine training. Internists are referred to by the ACP as “doctors for adults.”

Internal medicine training focuses on common general medical conditions, but also includes significant experience in neurology as well as such internal medicine subspecialties as endocrinology, rheumatology, and infectious diseases. Medical students must also gain adequate experience in psychiatry, dermatology, ophthalmology, office gynecology, otorhinolaryngology, non-operative orthopedics, palliative medicine, sleep medicine, geriatrics, and rehabilitation medicine to comprehensively care for adults, according to the ACP.

Family physicians complete extensive training beyond medical school — including a three-year residency to provide the best possible patient care from birth to death.

Inpatient vs. Outpatient Training Emphasis

Training in both specialties includes structured experience in outpatient and inpatient clinical settings, but the emphasis is different for each. Family medicine involves more outpatient care while internal medicine has more of an emphasis on inpatient care. 

At least one year of internal medicine training must involve caring for hospitalized patients, with training in intensive/critical care settings. Most training programs require more than one year of hospital-based work with additional training on such inpatient subspecialty services as cardiology, hematology-oncology, and gastroenterology. 

Fellowship and Career Path Options

After residency, internal medicine doctors can choose to become primary care internal medicine doctors or go on to become specialists by completing a fellowship.

Family doctors can pursue fellowships and certificates of added qualifications in such fields as adolescent medicine, maternal-child health, sports medicine, geriatrics, and faculty development, while still being a primary care doctor.

Your specialty does not necessarily determine your clinical setting (that is more a function of your specific job), but there are some generalizations. As examples of internal medicine vs. family medicine job settings, internal medicine places greater emphasis on inpatient and hospital-based work and family doctors often work in the outpatient setting, including home visits.

Internal Medicine: Residency Training and Scope

Internal medicine education focuses on adults and includes experience in both general medicine and the internal medicine subspecialties. The general and subspecialty nature of training allows internists to develop expertise in diagnosing the wide variety of diseases that commonly affect adults as well as in managing complex medical situations where multiple conditions may affect a single individual, according to the ACP.

Internists follow patients over the course of their lives — from young adulthood through old age — and establish long relationships with their patients, says the ACP. Internal medicine physicians are specially trained to solve puzzling diagnostic problems and can handle severe chronic illnesses and situations where several different illnesses may strike at the same time.

Internal medicine training prepares students to provide primary care to adults through their outpatient continuity experience during training, particularly for complicated medical cases. Their training also enables them to effectively interact with internal medicine subspecialty colleagues in co-managing complex patients (such as those with organ transplants, cancer, or autoimmune disease) and easily managing the transitions from outpatient to inpatient settings (and vice versa) for patients who require hospitalization.

Family Medicine: Residency Training and Scope

Family medicine provides medical care for families, and often these physicians treat multiple generations of family members from newborns to the elderly.

“Family medicine is very holistic in that you can form a close relationship with a patient and generations of their family — treating them at any stage of their lifetimes,” says Dr. Anderson. “A primary care physician usually serves as the patient's first point of entry into the healthcare system and the doctor they turn to first for their needed healthcare services.”

A family physician's training prepares them to work with patients as partners in their healthcare, helping them stay healthy, managing such chronic conditions as diabetes and high blood pressure, and treating such acute conditions as neck pain and shingles. Family medicine training prepares physicians to provide continuity of care across all stages of life, from birth through adolescence to childbirth, midlife, and eldercare. They are wellness-centered, working with patients to maintain good health and to prevent disease. In addition, they collaborate with other experts when specialized care is needed, according to the American Academy of Family Physicians (AAFP).

The range of influence for family physicians is broad, says the AAFP. The range includes:

• Caring for patients regardless of age or health condition, sustaining an enduring and trusting relationship
• Understanding community-level factors and social determinants of health
• Serving as a patient's first contact for health concerns
• Navigating the health care system with patients, including specialist and hospital care coordination and follow-up
• Using data and technology to coordinate services and enhance care
• Considering the impact of health on a patient’s family
• Providing care for underserved rural and urban populations

Family medicine physicians are skilled experts, patient advocates, problem-solvers, and medical team leaders, according to the AAFP. For medical students, choosing between internal medicine and family medicine involves evaluating differences in training structure, patient population, and long-term career pathways. These comparisons should help guide you to take the next step in your medical career. Students interested in pursuing either pathway can learn more about AUC’s MD program and residency outcomes here.

Related resources:

• AUC’s MD program
• Planning your career
• AUC residency placements