2024 Internal Medicine Clerkship Guide

Med School Insiders

Internal medicine doctors are generalists—just like doctors who work in family medicine. They know the interplay of each organ system and often consider their patients deeply for many hours at a time.

Internal medicine is one of the most important core clerkships; it can lead to numerous other specialties, and the content of the USMLE 2 CK exam is 50-60% internal medicine. The internal medicine clerkship provides medical students with the opportunity to learn a vast range of medical knowledge and gain a better understanding of what it’s like to be an internal medicine doctor.

“He who studies medicine without books sails an uncharted sea, but he who studies medicine without patients does not go to sea at all.” – William Osler

This guide will cover the internal medicine clerkship, including when to place this rotation, how to make the most of your rotation, internal medicine resources, the Shelf exam, and the pros and cons of pursuing this specialty.

Intro to the Internal Medicine Clerkship

Clinical clerkships, also known as rotations, are when medical students practice medicine under the supervision of an established physician or health practitioner. Clerkships allow students to experience a specialty first-hand to see what it’s really like. This way, they can determine which field of medicine they feel most passionate about and want to pursue in their future career.

Most US medical schools require the following rotations:

Medical School Clerkship icons

Some schools may also additionally require other rotations, such as emergency medicine, radiology, anesthesiology, etc.

Internal medicine is the specialty that deals with the diagnosis, treatment, and prevention of an extensive number of diseases and illnesses that affect adult patients. It’s such a broad specialty that it’s difficult to categorize—there are so many different things you can do with it.

The internal medicine clerkship represents the gateway to numerous medical specialties and opens the path to fellowships in cardiology, oncology, nephrology, gastroenterology, rheumatology, hematology, infectious diseases, endocrinology, and pulmonary disease.

Internal medicine doctors are the generalists of generalists. They treat an incredibly wide variety of medical conditions, whether they be acute or chronic, common or rare, complex or straightforward. Pursuing this specialty requires you to be heavily involved with direct patient care. It’s also important to have a passion for learning because internal medicine doctors must analyze broad volumes of information in order to get their patients back to a healthy baseline.

Because of this, internal medicine is much more of an intellectual specialty compared to others. But that’s not to say that internal medicine physicians never use their hands; they can occasionally perform minor procedures, such as thoracentesis, paracentesis, intubation, and more, but it’s rare to perform these procedures after residency.

In the outpatient setting, it’s typical for internal medicine doctors to perform steroid joint injections, ultrasounds, Pap smears, skin tag or wart removals, and other similar, minor procedures.

But whether internal medicine sounds up your alley or not, the internal medicine clerkship is extremely important due to its impact on the Step 2 CK exam. The USMLE 2 CK exam contains 50-60% internal medicine questions. Since Step 1 is now pass/fail, the need to ace the internal medicine Shelf exam in order to be prepared for 2 CK is greater than ever.

The competencies trained in the internal medicine rotation also have a lot of crossover with other specialties. For instance, being able to read an ultrasound scan (US) not only serves cardiologists, but it’s also very useful in critical care and diagnostic radiology. Being proficient at taking a patient’s medical history not only benefits internal medicine doctors but it’s also helpful for psychiatrists.

When to Place the Internal Medicine Rotation

Where you place the internal medicine rotation depends on your interest in pursuing it as a specialty and when you plan to take the Step 2 CK exam. If you want to pursue internal medicine for residency, it’s most strategic to place this rotation second or third out of the total of four quarters of the year.

This will make sure you have a foundation of experience before you enter the rotation you feel the most passionate about. Placing it first, when you’re just getting the hang of your third year clerkships, may not be the best time for you to impress your seniors and attendings. Not placing it last ensures you’re able to get enough references for applying to away rotations and residency programs.

This will give you enough time to get used to the process while also leaving enough time to build connections. You don’t want to find out right before scheduling away rotations that you actually hate the specialty you thought you were going to pursue. You also may need time to acquire adequate letters of recommendation.

If you don’t plan to pursue internal medicine as a specialty, completing this rotation earlier can serve as a foundation for your next rotation since you will soak in a vast amount of information during this time. On the other hand, another practical option is to place this rotation last so that you can review all of the content you need to know for Step 2 CK, which contains 50-60% internal medicine questions.

Making the Most of the Internal Medicine Rotation

Structure

The internal medicine rotation is a mix of inpatient and outpatient.

The inpatient part of the rotation may seem daunting at first. Rounds will take an enormous amount of time. Sometimes you’ll be bored, and at other times, some pathology may catch your attention. However, it is up to you to make the most of this time.

Here are some tips for the inpatient rotation.

Not all schools offer an outpatient portion of the IM clerkship; however, if they do, this portion of your rotation will be less intense. At this point, you may have the opportunity to choose a sub-specialty clinic. For example, if endocrinology interests you, arrange with an endocrinology attending for your outpatient rotation. This time enables a medical student to:

Important Topics to Understand Early On

Below is a list of high-yield topics for your internal medicine rotation. Having a good understanding of these topics early on will prepare you for practice questions and rounds to impress your attending.

Heart Failure

History – A patient with heart failure will complain of orthopnea, fatigue, and shortness of breath with effort. In order to classify their shortness of breath (SOB) in relationship with the effort, you can use the NYHA classification in the clinic.

Physical Exam – There will be a displaced apical impulse due to enlargement of the heart chambers. It is important to distinguish findings between left heart failure and right heart failure.

CAD/Angina/MI

History – Retrosternal chest pain with pain irradiating to the jaw or to the upper limb.

Physical exam – The patient can present with sympathetic activation, such as tachycardia, sweating, a sense of impending doom, or with PS activation (i.e., syncope).

Diagnosis – The diagnosis is made based on clinical presentation with an ECG. However, when the patient is known with previous MI, BBB, on digoxin, or with a pacemaker, the alternative to the ECG is the echocardiography. The next step is to administer the supportive treatment with morphine, nitroglycerin (not administered in right heart infarction), oxygen, and aspirin. When arriving in the ED, one can continue with the cardiac markers, such as troponin and CK-MB. The latter is better used for patients who had an infarction in the last week.

Treatment – If the pain started less than 90 minutes ago, the best next step would be a percutaneous coronary intervention with stenting. However, if the pain started more than 90 minutes ago, it’s recommended to start a fibrinolytic therapy.