Choosing the right doctor is an important part of staying healthy. For many adults, that doctor is an internist. Hospitals and clinics often rely on a healthcare staffing agency to fill physician staffing needs with qualified internists and other medical professionals.
An internist specializes in adult medicine and provides care for everything from routine checkups to complex health conditions. They help prevent disease, diagnose illnesses, manage chronic conditions, and coordinate care with other specialists when needed.
Many people have heard the term internist, but they’re not always sure what it means. Some even confuse an internist with a medical intern. Others wonder how an internist differs from a family medicine doctor.
This guide explains what internal medicine is, what an internist does, and when you should consider seeing one.
What Is Internal Medicine?
Internal medicine is the medical specialty focused on preventing, diagnosing, and treating diseases in adults.
Doctors who practice internal medicine care for patients throughout adulthood. They treat common illnesses, manage long-term medical conditions, and help patients stay healthy as their healthcare needs change over time.
Unlike pediatricians, who care for children, internists treat adults only. Because of this specialized training, they have extensive knowledge of adult health conditions and often manage patients with multiple medical concerns at the same time.
What Is an Internist?
An internist is a physician who specializes in adult healthcare. They care for adults from age 18 through older adulthood and often serve as a patient’s primary care doctor.
Rather than focusing on one part of the body, a general internist looks at your overall health. They understand how different conditions can affect one another and develop treatment plans that address the whole person.
For example, an internist may help manage:
- High blood pressure
- Diabetes
- High cholesterol
- Thyroid disorders
- Kidney disease
- Asthma
- Digestive disorders
- Preventive healthcare
Many adults live with more than one medical condition. An internist brings those conditions together into one coordinated care plan instead of treating each problem separately.
What Does an Internist Doctor Do?
An internist provides comprehensive medical care for adults. They diagnose illnesses, treat both short-term and chronic conditions, and help patients maintain their health through preventive care.
During a visit, the doctor reviews your symptoms, medical history, medications, and lifestyle. If needed, they order tests, make a diagnosis, and recommend the most appropriate treatment. When a condition requires advanced care, they also coordinate with other specialists to ensure you receive the right treatment.
Diagnose Medical Conditions
The first step is finding the cause of your symptoms. An internist carefully reviews your health history, performs a physical exam, and may order additional tests to confirm a diagnosis.
These tests may include:
- Blood tests
- Urine tests
- Imaging studies
- Heart tests
- Lung function tests
By combining this information, the doctor can identify the problem and recommend the best course of treatment.
Manage Chronic Diseases
Many adults live with long-term health conditions that require ongoing care. An internist helps monitor these conditions, adjust treatment when needed, and reduce the risk of complications.
Common conditions they manage include:
- Diabetes
- Heart disease
- High blood pressure
- High cholesterol
- COPD
- Arthritis
- Osteoporosis
- Chronic kidney disease
Regular checkups help keep these conditions under control and support better long-term health.
Provide Preventive Care
Preventing illness is just as important as treating it. That’s why internists focus on finding health problems early, before they become more serious.
Preventive care may include:
- Annual wellness exams
- Blood pressure checks
- Cholesterol screening
- Cancer screenings
- Vaccinations
- Weight management
- Nutrition counseling
- Smoking cessation support
These services help patients stay healthier and may reduce the risk of future health problems.
Coordinate Specialist Care
Some medical conditions require treatment from a specialist. When that happens, your internist helps coordinate your care and keeps track of your overall treatment plan.
Depending on your needs, they may refer you to specialists such as:
- Cardiologists
- Endocrinologists
- Gastroenterologists
- Pulmonologists
- Nephrologists
- Rheumatologists
By working closely with other healthcare providers, your internist helps ensure every part of your care stays connected.
Conditions an Internist Treats
Internists care for a wide range of health conditions that affect adults. They treat common illnesses, help manage chronic diseases, and monitor ongoing health concerns. Many patients have more than one condition, so an internist looks at how those conditions affect each other instead of treating them separately.
Some of the most common conditions an internist treats include:
- Diabetes
- High blood pressure
- Heart disease
- High cholesterol
- Thyroid disorders
- Asthma
- COPD
- Kidney disease
- Liver disease
- Digestive disorders
- Arthritis
- Osteoporosis
- Depression
- Anxiety
- Sleep disorders
- Obesity
- Chronic fatigue
- Infections
Because adult health can become more complex over time, an internist develops a treatment plan that supports your overall well-being instead of focusing on a single illness.
Internist vs. Family Medicine Doctor
Many people wonder whether they should see an internist or a family medicine doctor. Both provide primary care, but they serve different patient groups and have different areas of focus.
An internist treats adults only. Their training focuses on adult diseases, chronic condition management, and preventive care. Family medicine doctors treat patients of all ages, including infants, children, teenagers, and adults.
| Internist | Family Medicine Doctor |
| Treats adults only | Treats children and adults |
| Specializes in adult health | Provides care for all ages |
| Manages complex chronic illness | Offers broad primary care for families |
| Extensive training in internal medicine | Broad training across multiple age groups |
Both specialties provide excellent primary care. The right choice depends on your age, medical history, and healthcare needs. Adults with multiple or complex health conditions often choose an internist because of their specialized training in adult medicine.
Internists are one type of primary care physician for adults. If you’d like to learn more about this career path, explore our guide on How to Become a Primary Care Physician.
Where Do Internists Work?
Internists work in hospitals, outpatient clinics, and private practices. Many also take locum tenens assignments, providing temporary coverage where healthcare organizations need experienced physicians. Explore our Medical Doctor (Internal Medicine) Jobs to find current career opportunities with leading healthcare facilities.
When Should You See an Internist?
You don’t have to be seriously ill to visit an internist. Many people see one each year for preventive care, while others visit when they develop new symptoms or need help managing a long-term condition.
You may want to schedule an appointment if you:
- Need an annual wellness exam
- Have high blood pressure or high cholesterol
- Need help managing diabetes
- Feel tired for no clear reason
- Have chest discomfort or shortness of breath
- Experience ongoing digestive problems
- Get frequent infections
- Notice unexplained weight changes
- Have trouble sleeping
- Take multiple prescription medications
- Live with more than one chronic condition
Even if you feel healthy, regular checkups can help detect problems early. Early diagnosis often leads to simpler treatment and better long-term health.
What Happens During Your First Appointment?
Your first visit gives the internist a complete picture of your health. They’ll review your medical history, discuss your symptoms, perform a physical exam, and recommend any tests or treatments you may need.
Although every appointment is different, most first visits include the following steps.
1. Review Your Medical History
Your doctor will ask about your overall health and any concerns you have. This includes previous illnesses, surgeries, medications, allergies, family medical history, and daily habits such as diet, exercise, smoking, and alcohol use.
These details help identify possible health risks and guide your care.
2. Perform a Physical Exam
Next, the internist will perform a physical examination to check your overall health. They may measure your blood pressure, heart rate, weight, and breathing. The doctor will also examine your heart, lungs, abdomen, and other body systems based on your symptoms.
This exam helps detect health problems that may not be obvious yet.
3. Discuss Your Symptoms
If you’re experiencing symptoms, your doctor will ask when they started, how severe they are, and whether anything makes them better or worse.
Even small details can help your doctor make a more accurate diagnosis.
4. Create a Personalized Treatment Plan
Once the evaluation is complete, your internist will explain the findings and recommend the next steps.
Your treatment plan may include:
- Lifestyle changes
- Medications
- Blood work or imaging tests
- Follow-up appointments
- Referrals to specialists, if needed
The goal is to create a care plan that fits your health needs and supports your long-term well-being.
Why Internal Medicine Matters
Health needs often become more complex as people get older. It’s common for adults to develop more than one medical condition, and those conditions can affect each other in different ways.
An internist understands these connections. Instead of treating one illness at a time, they look at your overall health and how different conditions, medications, and lifestyle factors work together.
The Agency for Healthcare Research and Quality (AHRQ) highlights that coordinated, patient-centered care can improve health outcomes, reduce medical errors, and help patients better manage chronic conditions. This reflects the whole-person approach that guides internal medicine.
This approach leads to better coordinated care, fewer medication conflicts, and more effective long-term treatment.
How to Choose the Right Internist
Choosing an internist is an important decision because this doctor may become your long-term healthcare provider. The right physician will understand your medical history, answer your questions, and help you manage your health as your needs change over time.
When comparing doctors, consider factors such as:
- Board certification
- Experience treating chronic conditions
- Hospital affiliations
- Insurance acceptance
- Office location
- Appointment availability
- Communication style
- Patient reviews
Look for a doctor who listens carefully, explains medical information clearly, and makes you feel comfortable discussing your health concerns. Building a strong relationship with your internist can make it easier to manage your health for years to come.
Frequently Asked Questions
Is an internist the same as a primary care doctor?
Often, yes. Many internists serve as primary care physicians for adults. They provide routine checkups, preventive care, diagnose illnesses, manage chronic conditions, and coordinate care with other specialists when needed.
Does an internist perform surgery?
No. Internists do not perform surgery. They diagnose and treat medical conditions and refer patients to surgeons or other specialists when surgical care is necessary.
Can an internist treat diabetes?
Yes. Diabetes management is one of the most common parts of internal medicine. An internist monitors blood sugar levels, prescribes medications, recommends lifestyle changes, and helps prevent long-term complications.
Should older adults see an internist?
Many older adults choose an internist because they often manage several health conditions at once. An internist can coordinate treatment, review medications, monitor chronic diseases, and help patients maintain their overall health as they age.
Final Thoughts
An internist plays a key role in helping adults stay healthy. From preventive care and routine checkups to managing chronic conditions, they provide expert care throughout every stage of adulthood.
Whether you need treatment for a new concern or ongoing support for a long-term condition, an internist can help you achieve better health. Healthcare organizations can also rely on Imperial Locum to connect them with qualified physicians, ensuring consistent staffing and high-quality patient care.
