Medically reviewed by Raghuveer Boddireddy, MD, Interventional Radiology. Last reviewed: October 23, 2026.
What kind of doctor provides Computed Tomography (CT Scan)?
A radiologist, a specialist doctor who reads imaging tests, reviews the CT images and shares the results with your provider. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
A computed tomography (CT) scan is an imaging test that uses x-rays to create pictures of cross-sections of the body. These cross-sections are called slices, and a computer can stack them to make a three-dimensional model. A CT scan can give a doctor more detail than a regular x-ray. It is also called a CAT scan.
Why a doctor might recommend it
Your provider may suggest a CT scan for many reasons, including the following.
- Broken bones
- Cancer, tumors, or masses
- Blood clots or signs of heart disease
- Spinal conditions or lung disease
- Infection
A CT scan can also guide a doctor to the right place for a biopsy, or check for internal bleeding after an injury.
How to prepare
- You may be asked not to eat or drink for a few hours before the scan, so ask your provider for instructions.
- Tell your provider if you have ever had a reaction to contrast, the special dye used in some scans.
- Tell your provider if you have kidney problems.
- Tell your provider if you take the diabetes medicine metformin.
- Always tell your provider if you are pregnant or think you may be pregnant.
- You will remove jewelry and may wear a gown.
What happens during it
You lie on a narrow table that slides into the center of the CT scanner, a large donut-shaped machine. An x-ray beam rotates around you to take the pictures. You must stay still, and you may be told to hold your breath for short periods. The scan is painless and usually takes a few minutes, but some last up to 30 minutes, depending on the area scanned. Some scans use contrast, which can be given through a vein, as a drink, or rarely by enema. Contrast through a vein may cause a slight burning feeling, a metallic taste, and a warm flush. These usually go away within a few seconds.
Recovery
Most people can return to normal activities right away. If you were given contrast, drinking fluids can help your body clear it. People with diabetes or kidney disease may need extra fluids after the test.
Risks and side effects
CT scans use radiation, and they expose you to more of it than regular x-rays. Many scans over time may raise the risk of cancer, but the risk from any one scan is small. Contrast dye can cause an allergic reaction, and it can harm kidney function. Children are more sensitive to radiation, so parents may ask whether the machine settings are adjusted for children. Rarely, the dye can cause a life-threatening allergic response called anaphylaxis. The scanner has an intercom, so the operator can hear you at all times. After the scan, call 911 or go to the emergency room if you have trouble breathing, swelling of the face, eyes, or tongue, chest pain, or fainting.
Who performs it
Your provider may suggest a CT scan. A radiologist reviews the images and shares the results with your provider.
Common questions
Does a CT scan hurt?
No, the scan itself is painless. Some people feel discomfort from lying on the hard table.
How long does a CT scan take?
The scan usually takes a few minutes, but some may last up to 30 minutes, depending on the area being scanned.
Is a CT scan safe during pregnancy?
A CT scan poses no known risks to the baby if the area being imaged is not the abdomen or pelvis. If the abdomen or pelvis must be imaged, doctors prefer MRI or ultrasound, which do not use radiation. A CT may be acceptable if those cannot give the answers needed or there is an emergency.
What is contrast in a CT scan?
Contrast is a special dye that helps certain areas show up better on the x-rays. Dye for a vein often contains iodine, and a drink may be used for the digestive system.
How does a direct primary care or concierge doctor fit in?
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either one can talk with you about why a scan is needed and refer you to a radiologist or specialist when needed.
Sources
- MedlinePlus - CT scan
- MedlinePlus - CT Scans
- National Institute of Biomedical Imaging and Bioengineering - Computed Tomography (CT)
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
