Short answer · Medically reviewed summary · Last updated: 2026-04-07

The primary ICD-10 code for gastritis is K29, which encompasses various forms of the condition, while the ICD-9 code is 535. These classification systems are essential for clinical documentation and insurance billing, though specific sub-types of gastritis require more granular coding to reflect the underlying etiology, such as Helicobacter pylori infection or autoimmune processes. What is the clinical significance of Gastritis coding? Gastritis represents a group of conditions characterized by inflammation of the stomach lining.

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ICD10 code of Gastritis and ICD9 code

ICD-10 and ICD-9 codes for Gastritis, with classification details for clinicians, coders and patients.

ICD9 and ICD10 codes of Gastritis

The primary ICD-10 code for gastritis is K29, which encompasses various forms of the condition, while the ICD-9 code is 535. These classification systems are essential for clinical documentation and insurance billing, though specific sub-types of gastritis require more granular coding to reflect the underlying etiology, such as Helicobacter pylori infection or autoimmune processes.



What is the clinical significance of Gastritis coding?


Gastritis represents a group of conditions characterized by inflammation of the stomach lining. Because the clinical presentation can range from acute, erosive symptoms to chronic, non-erosive changes, accurate coding using the ICD-10 K29 series allows physicians to distinguish between types such as acute gastritis with or without hemorrhage, or chronic superficial gastritis. Understanding these codes is vital for patients navigating the healthcare system, as it ensures that the specific nature of your gastritis is accurately captured in your medical records.



How is Gastritis classified for medical records?


While the umbrella term gastritis is common, international coding systems provide specificity to guide treatment plans. ICD-10 uses the K29 category to categorize the condition, while the older ICD-9 system utilized code 535. Within the ICD-10 framework, clinicians often use specific sub-codes to denote the presence of complications or causative agents:



  • K29.0: Acute gastritis with hemorrhage.

  • K29.3: Chronic superficial gastritis.

  • K29.4: Chronic atrophic gastritis.

  • K29.5: Unspecified chronic gastritis.

  • K29.7: Gastritis, unspecified.



Why is it important to differentiate between types of Gastritis?


From a clinical perspective, the management of gastritis depends heavily on the root cause. For example, gastritis caused by H. pylori requires a completely different therapeutic approach—often involving antibiotics—compared to gastritis caused by the long-term use of non-steroidal anti-inflammatory drugs (NSAIDs). By documenting the precise ICD-10 code, your healthcare provider ensures that your treatment path is targeted, effective, and evidence-based.



How does the DiseaseMaps community support patients?


Living with chronic stomach inflammation can be isolating. At DiseaseMaps.org, we have 78 people with gastritis who have joined the community to share their experiences, symptom management strategies, and emotional support. Connecting with others who understand the day-to-day challenges of gastritis can be an invaluable part of your journey, providing insights that go beyond clinical codes and medical charts.



Next steps



  • Consult a gastroenterologist to confirm your specific type of gastritis and ensure your medical records reflect the correct diagnosis.

  • Request a copy of your pathology report if you have undergone an endoscopy, as this is the gold standard for defining the specific subtype of gastritis.

  • Join the community at DiseaseMaps.org to connect with others who are managing similar digestive health concerns.

  • Keep a detailed symptom diary to share with your physician, which helps in identifying triggers and monitoring the efficacy of prescribed treatments.



Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.



References



  • World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10).

  • National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK): Gastritis Overview.

  • Centers for Disease Control and Prevention (CDC): ICD-9-CM and ICD-10-CM Coding Guidelines.

  • PubMed Central: "Clinical manifestations and diagnosis of gastritis" (Clinical review literature).

Author: DiseaseMaps Editorial Team
Reviewed against authoritative medical sources (NIH GARD, Orphanet, OMIM)
Last updated: 2026-04-07
Medical disclaimer: This information does not substitute professional medical advice. Always consult your doctor before making health decisions.
Source: DiseaseMaps.org
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