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What is an electrogastrogram?

midsection of senior woman suffering from stomachache

An electrogastrogram (EGG) is a painless test that detects problems with the nerves and muscles of the stomach. An EGG uses electrical signals to measure the activity of muscles and nerves in the stomach. An EGG can help diagnose stomach symptoms, including gas and chronic nausea, vomiting, and indigestion. It can also diagnose gastroparesis, a disorder in which the stomach takes too long to empty its contents. 

Many insurance companies consider an EGG to be experimental technology. Check with your insurance company and your doctor about your coverage. 

An EGG is only one method to diagnose stomach digestion problems. Discuss all of your testing options with your doctor to understand which options are right for you.  

Medical Reviewers: William C. Lloyd III, MD, FACS Last Review Date: Sep 9, 2016

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Medical References

  1. Cutaneous Electrogastrogram (EGG). Blue Cross of Idaho. https://www.bcidaho.com/providers/medical_policies/med/mp_20134.asp
  2. Electrogastrogram (EGG). California Pacific Medical Center. http://www.cpmc.org/services/gi/egg.html
  3. Electrogastrogram (EGG). Dartmouth-Hitchcock. http://patients.dartmouth-hitchcock.org/gi/electrogastrogram.html
  4. Electrogastrogram (EGG), Transcutaneous. Blue Cross Blue Shield of Michigan. http://secure.bcbsm.com/mprApp/MedicalPolicyDocument?fileId=2046981
  5. Gastric Stasis, Diagnosis and Treatment with Electrical System. United Healthcare Oxford. https://www.oxhp.com/secure/policy/gastric_stasis_409.html
  6. Gastrointestinal Function: Selected Tests. Aetna. http://www.aetna.com/cpb/medical/data/300_399/0396.html
  7. Gastroparesis. BetterMedicine. http://www.bettermedicine.com/article/gastroparesis
  8. Indigestion. BetterMedicine. http://www.bettermedicine.com/article/indigestion

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