ICD-10 Code E87.22 – Chronic metabolic acidosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E87.22 – Chronic metabolic acidosis
What it is
Chronic metabolic acidosis is a long-lasting acid-base imbalance in which the body has too much acid or too little base. Use this code when documentation identifies persistent metabolic acidosis rather than an acute episode.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include a confirmed diagnosis of chronic metabolic acidosis, often supported by laboratory assessment and provider assessment of an ongoing acid-base disorder.
When to use this code
Use E87.22 when the provider documents chronic metabolic acidosis as an active condition. It may appear in problem lists, assessment notes, or discharge summaries when the disorder is being monitored or managed over time. If the record only says “metabolic acidosis” without chronicity, check documentation.
Do not use for
Do not use this code for acute metabolic acidosis or other acid-base disorders such as respiratory acidosis. If the chart does not clearly state chronic metabolic acidosis, do not assume chronicity.
Coding tip
Code the condition only when the documentation clearly supports a chronic diagnosis and avoid inferring chronicity from a single abnormal result.