ICD-10 Code E88.9 – Metabolic disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E88.9 – Metabolic disorder, unspecified
What it is
E88.9 is a nonspecific code for a metabolic disorder when the documentation does not identify a more exact condition. It indicates an abnormality in body metabolism, but the type is not stated.
Clinical signs
Clinical features vary; refer to documentation. Patients may have signs of a metabolic problem, but the record should not provide enough detail to assign a more specific diagnosis.
When to use this code
Use E88.9 when the provider documents a metabolic disorder without naming the exact disorder. It is appropriate when the chart supports a metabolic condition, but the specific entity is unclear or not yet confirmed. Check documentation if another code is available.
Do not use for
Do not use this code when the provider names a specific metabolic disease, inherited disorder, or endocrine condition. Avoid it if the record supports a more precise ICD-10-CM diagnosis.
Coding tip
Query for the exact metabolic disorder whenever the documentation is vague, because E88.9 is a fallback code.