Anpheros Search · Condition

Acid reflux (GERD)

Also known as: Gastro-oesophageal reflux disease, unspecified

General information only. Anpheros does not diagnose and does not recommend treatment. Talk to a doctor or pharmacist about your situation. In an emergency, call 112 (or your local emergency number).

Codes

ICD-10
K21
ICD-11
DA22.Z Gastro-oesophageal reflux disease, unspecified

Description

What is GERD?

Sometimes, after eating a large meal or lying down too soon after eating, you might feel acid coming up into your throat. This is called gastroesophageal reflux (GER). It happens when the muscle at the end of your esophagus (the tube that carries food from your mouth to your stomach) doesn't close properly. Stomach contents can then move back up and irritate the esophagus.

Having reflux occasionally is common. But if you have symptoms two or more times a week or if they cause damage to the lining of your esophagus, you may have gastroesophageal reflux disease (GERD). GERD is a chronic (long-lasting) condition that can cause discomfort and, over time, lead to other health problems.

Anyone can have GERD, including infants and children.

What causes GERD?

GERD can happen when the muscle at the bottom of your esophagus becomes weak or relaxes at the wrong time. You are more likely to have GERD if you:

  • Are overweight or have obesity
  • Are pregnant
  • Smoke or are around secondhand smoke
  • Have a hiatal hernia (when part of the stomach pushes up into the chest)

Certain foods, drinks, or medicines can also make GERD worse.

What are common symptoms of GERD?

The most common symptom of GERD is heartburn. This is a burning feeling in your chest or throat. You can also have GERD without having heartburn. Other symptoms may include:

  • Tasting acid or food in the back of your mouth
  • A dry cough or hoarse voice
  • Asthma-like symptoms
  • Trouble swallowing

Get medical help right away if you have chest pain with shortness of breath, or pain in your jaw or arm. These can be signs of a heart problem.

How is GERD diagnosed?

Your health care provider will ask about your symptoms and medical history. They may recommend tests such as:

  • Upper GI endoscopy to look at the esophagus and stomach lining with a tiny camera.
  • Biopsy to check a small tissue sample.
  • X-Ray to take pictures of the upper digestive system.
  • Esophageal pH test to measure how often acid backs up the esophagus and how long the acid stays there.
  • Esophageal manometry to check how well your esophagus moves food when you swallow.
  • Transnasal esophagoscopy to look for damage to the esophagus by using a small tube with a camera.

How is GERD treated?

Most people can manage GERD with lifestyle changes and medicine. In rare cases, surgery is needed.

Lifestyle changes can include:

  • Eating smaller meals and avoiding lying down for at least 2-3 hours after eating
  • Avoiding foods that trigger symptoms, such as spicy foods, chocolate, caffeine, or fatty foods
  • Losing weight if needed
  • Raising the head of your bed
  • Quitting smoking

Medicines can include:

  • Over-the-counter medicines, such as antacids
  • Prescription medicines

If not treated, GERD can cause problems like inflammation of the esophagus, scarring, or changes in the tissue lining (Barrett's esophagus). It can also worsen asthma or cause chronic (long-term) cough or hoarseness.

Can GERD be prevented?

You may be able to improve symptoms of GERD by:

  • Avoiding alcohol and trigger foods
  • Eating smaller meals
  • Not eating close to bedtime
  • Wearing loose-fitting clothes
  • Sleeping on your left side or raising the head of your bed
  • Maintaining a healthy weight

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Source: MedlinePlus, National Library of Medicine.

Related terms in the cited sources

Medicines with an official indication for this condition

May be associated with

In alphabetical order.

Next to it in ICD-10

Neighbouring codes in the classification, not a medical link.

External resources

Questions

What is the ICD-10 code for Acid reflux (GERD)?

K21 (WHO, International Classification of Diseases, 10th Revision).

What is the ICD-11 code for Acid reflux (GERD)?

DA22.Z: Gastro-oesophageal reflux disease, unspecified (WHO, ICD-11 for Mortality and Morbidity Statistics).

Sources and attribution

  • ICD-11 for Mortality and Morbidity Statistics, © World Health Organization, licensed under CC BY-ND 3.0 IGO.
  • Names other than the official source titles: Anpheros translations and plain-language names, made with AI assistance and checked automatically; the source names are in English.
  • Source: MedlinePlus, National Library of Medicine.
  • Source: European Medicines Agency (EMA) — EPAR. © European Medicines Agency.
  • ICD-10 codes and titles © World Health Organization. Source: WHO, International Classification of Diseases, 10th Revision (2019).

Anpheros Search catalog 2026.10.5, published 17 October 2026. About the data →