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Esophagogastroduodenoscopy (EGD) Study

Published: August 9, 2026Updated: August 16, 2026

An upper endoscopy examines the esophagus, stomach, and first part of the small intestine using a flexible camera-equipped scope.

Quick summary

["This test can identify ulcers, inflammation, bleeding, or other problems in the upper digestive tract and may obtain tissue samples."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
28014-9
Short code
EGD Study
Synonyms
EGD Study
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
egd
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

An esophagogastroduodenoscopy, or EGD, is an endoscopic examination of the esophagus, stomach, and duodenum. A flexible lighted scope is passed through the mouth into the upper digestive tract so the clinician can view the lining directly.

Why might I need this test?

An EGD may be recommended to investigate unexplained swallowing difficulty, persistent nausea, vomiting, abdominal pain, heartburn, or gastrointestinal bleeding. It can also be used to monitor certain conditions or evaluate suspicious areas found during another test.

How is the test performed?

You will usually receive medicine to help you relax, and a sedative or anesthesia may also be given. The scope is guided through your mouth and into the stomach and duodenum while the clinician examines the lining, may take tissue samples, and may treat some bleeding areas.

How do I prepare for the test?

Follow your clinician's instructions, which commonly include fasting for several hours before the procedure. Tell the healthcare team about all medicines, supplements, allergies, pregnancy, and any history of heart, lung, kidney, or bleeding problems. Arrange transportation home if you will receive sedation or anesthesia.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Upper endoscopy

Frequently asked questions

Is an EGD the same as a colonoscopy?
No. An EGD examines the upper digestive tract, while a colonoscopy examines the large intestine and the end of the small intestine.
Will I feel anything during the EGD?
Most people are given medicine to relax and may receive sedation, so they usually remain comfortable and may not remember the procedure. You may feel pressure in your throat or upper abdomen as the scope is advanced.
Can an EGD be used to treat a problem?
Yes. The clinician may use the scope to control some bleeding, remove a foreign object, or open a narrowed area. Additional treatment, if needed, will depend on the findings.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy