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Understanding This Test: What It Does, Possible Adverse Events, and How They Are Managed

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

Information about potential adverse events and complications that may occur after an upper gastrointestinal endoscopy procedure.

Quick summary

{"Upper endoscopy (EGD) is a safe procedure with low complication rates","Most common complications include bleeding, perforation, and reactions to sedation","Contact your doctor immediately if you experience severe symptoms after the procedure","Most complications are rare and can be managed if detected early","Follow pre-procedure instructions to minimize risks"}

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

Key facts at a glance

LOINC
111918-9
Short code
AE-PP-EGD
Synonyms
Advrs evnts pst proc UGI Endscpy
Category
chemistry
Sample
serum
Container
No specimen collection required - this is a clinical documentation test
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
≥ 18 years
Method
endoscopy
CPT
43239, 43200
SNOMED
713196008, 265764009
Specimen volume
N/A - no specimen collected
Stability
N/A - clinical observation data
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
1–168 hours
Order
routine

What is this test, and why might my healthcare provider recommend it for me?

This test documents and tracks any adverse events or complications that may occur after an upper gastrointestinal endoscopy (EGD). An upper endoscopy is a procedure where a doctor uses a thin, flexible tube with a camera (endoscope) to examine the lining of your esophagus, stomach, and the first part of your small intestine (duodenum). This test helps healthcare providers monitor, classify, and report any complications that might arise following the procedure.

What are the potential adverse events that could happen during or after this test?

While upper endoscopy is generally safe, potential adverse events may include: Bleeding (especially if a biopsy was taken or a polyp was removed), perforation (a small tear in the gastrointestinal wall), reaction to sedatives or anesthesia, infection, sore throat, and very rarely, complications related to existing medical conditions. The overall complication rate is very low, typically less than 1-2% for diagnostic procedures.

What symptoms should I watch for at home once my test has been completed?

After your procedure, contact your healthcare provider immediately if you experience: Severe or worsening abdominal pain, fever or chills, difficulty swallowing, vomiting (especially if it contains blood or looks like coffee grounds), black or tarry stools, chest pain, shortness of breath, or any signs of an allergic reaction to medications.

How are adverse events managed or treated if they occur after this test?

If complications occur, treatment depends on the type and severity. Minor bleeding may stop on its own or require medication. Perforation often requires surgical repair or endoscopic closure. Infections are treated with antibiotics. Your healthcare team will determine the appropriate management based on your specific situation.

Reference range

No adverse events documented; presence of adverse events is coded as 1 (present) or 0 (absent) for specific event typesN/A

Specimen: serum

Patient should be monitored for adverse events during the recovery period following upper GI endoscopy. Common post-procedure symptoms include sore throat, bloating, and mild discomfort. Instruct patient to report severe abdominal pain, vomiting, fever, difficulty swallowing, or rectal bleeding. Arrange follow-up contact at 24 hours and 7 days post-procedure to assess for delayed complications

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How common are complications after upper endoscopy?
Major complications are rare. The risk of serious adverse events is less than 1% for diagnostic upper endoscopy. Complications are more common when therapeutic procedures (like polyp removal or stretching of narrowed areas) are performed during the endoscopy.
How long after the procedure might complications appear?
Most complications that occur will appear within 24-48 hours after the procedure. However, delayed bleeding or perforation can occasionally occur days later. Follow all post-procedure instructions and report any unusual symptoms promptly.
Can I prevent complications?
While not all complications can be prevented, you can reduce risks by: Following all pre-procedure fasting instructions, informing your doctor about all medications and health conditions, disclosing any allergies, and following all post-procedure care instructions provided by your healthcare team.
Is upper endoscopy safe for everyone?
Your doctor will evaluate your individual health status to determine if upper endoscopy is safe for you. Certain conditions may increase risk, including severe heart or lung disease, bleeding disorders, and recent heart attack. Discuss your complete medical history with your doctor before the procedure.
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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