Pre-Op Clearance

Medically reviewed by Yulya Timashpolsky, MD · Updated September 28, 2026

Pre-operative clearance is a medical evaluation done before surgery to answer two questions: how likely you are to have a problem during or after the operation, and what can be done beforehand to lower that risk. It is not a rubber stamp or a form to be signed. A good pre-op visit finds the uncontrolled blood pressure, the unexpected rhythm problem, the blood thinner nobody mentioned or the diabetes that needs tightening, and deals with it while there is still time.

Surgeons and anesthesiologists rely on this evaluation because they usually meet you only briefly before your procedure. Your internist knows your history, your medications and your other conditions, and can put them together into a clear picture of your risk. At NYMD Center our internal medicine physicians perform pre-op evaluations for patients having surgery with outside surgeons as well as for procedures within our own group.

For office-based procedures done under sedation in our practice, our standing rule is simple: every patient over 40, and anyone of any age with significant health issues, has a preoperative evaluation first. Sedation is safe for the great majority of people, and this is how we keep it that way.

Who needs pre-op clearance

Many surgeons require clearance for any procedure that involves general anesthesia or sedation, and almost all require it for patients with heart disease, lung disease, diabetes, kidney disease, a history of stroke or blood clots, sleep apnea, or a long medication list. Even when your surgeon does not require it, a pre-op visit is worth having if you are older, have several chronic conditions or have not seen a doctor in some time. The type of operation matters too: a short procedure under light sedation carries different risks from a long operation with significant blood loss, and the evaluation is scaled to match.

How we evaluate you at NYMD Center

The core of the evaluation is a detailed history and physical examination. We ask about your heart and lungs, how much activity you can do without chest pain or breathlessness, whether you snore or stop breathing at night, any bleeding problems, prior reactions to anesthesia in you or your family, and how you recovered from past operations. We check your blood pressure, heart and lung sounds, airway and legs, and review any conditions that need attention before surgery, such as high blood pressure or diabetes.

Medication review

Medications cause more pre-op problems than almost anything else, so we go through every one, including over-the-counter drugs and supplements. Blood thinners and antiplatelet drugs may need to be paused or bridged, and that plan is made together with the prescribing doctor and your surgeon, never on your own. Diabetes medicines often need dose changes around surgery; MedlinePlus notes that metformin and SGLT2 inhibitors in particular need a plan. GLP-1 medications such as semaglutide and tirzepatide slow stomach emptying, and the American Society of Anesthesiologists has warned that this can raise the risk of stomach contents entering the lungs under anesthesia or deep sedation. Guidance on how long to hold these drugs has continued to evolve, so the final instructions come from your surgeon and anesthesia team, and we make sure they know you are taking one.

Tests, only when they change the plan

Testing is tailored to you and the operation, not ordered by habit. The 2024 ACC/AHA guideline on perioperative cardiovascular care advises against routine ECGs in low-risk patients and against stress testing in low-risk patients or stable patients having low-risk surgery, because those tests rarely change management and can delay surgery without improving outcomes. When your age, symptoms, heart history or the size of the operation call for it, we do an ECG in the office. An echocardiogram is added when we hear a new murmur or suspect heart failure, and an exercise or stress test is reserved for patients whose symptoms or risk suggest a heart problem that needs answering before surgery. Blood work, such as a blood count, kidney function, blood sugar, electrolytes or clotting tests, and a chest x-ray are ordered when your history points to them, as MedlinePlus describes.

Communication with your surgeon

At the end of the evaluation we send your surgeon a written summary: your conditions, your medications and what to do with each one, test results, your estimated risk and any recommendations for the day of surgery. If we find something that needs treatment first, we say so plainly and help schedule it, whether that means adjusting blood pressure medicine, improving blood sugar control or arranging a cardiology opinion. Sometimes the right advice is to postpone an elective operation by a few weeks. That is a small price for a safer surgery.

Timing and what to bring

Most surgeons want the pre-op visit within about 30 days of surgery, which fits MedlinePlus guidance that the checkup happen within the month before an operation. Check with your surgeon, because some ask for a shorter window and some lab results expire. Booking two to four weeks ahead leaves time to act on anything we find.

Bring your surgeon's name, contact information and any clearance form they gave you; the date and type of surgery; a complete list of your medications, doses and supplements, or the bottles themselves; recent test results such as ECGs, echocardiograms or stress tests; records from cardiologists or other specialists; and any anesthesia problems you or your family have had. The American Society of Anesthesiologists also suggests bringing written questions, and it helps to bring someone who can take notes.

What to expect at your visit

The visit usually takes place at either our Midtown or Forest Hills office and includes a conversation, a physical examination and, when indicated, an ECG and a blood draw on the same day. Some patients are ready for clearance at the end of the visit. Others need a result or a specialist opinion first, and we tell you exactly what is pending and when your surgeon will hear from us. If your surgery is canceled or delayed beyond the window your surgeon requires, a brief update visit is usually enough.

When to seek care urgently

If you develop chest pain, new shortness of breath, fainting, a racing or irregular heartbeat, a fever or a new infection in the days before surgery, call your surgeon and our office, because the plan may need to change. Chest pain that is severe or comes with sweating, breathlessness or pain spreading to the arm or jaw is an emergency: call 911.