ICD-10 Code E88.8 – Other specified metabolic disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E88.8 – Other specified metabolic disorders
What it is
E88.8 is used for metabolic disorders that do not fit a more specific ICD-10-CM code. It signals a documented metabolic condition that is identified, but not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect an abnormal metabolic process, but the record should name the specific disorder or describe the metabolic abnormality clearly.
When to use this code
Use E88.8 when the provider documents a metabolic disorder that is not captured by a more specific code in the E88 category. It is appropriate when the diagnosis is established, but the exact subtype is not listed elsewhere. If the chart is vague, check documentation before assigning this code.
Do not use for
Do not use E88.8 when a more specific metabolic disorder code is available. Also avoid it for nonspecific symptoms or abnormal test results without a documented metabolic diagnosis.
Coding tip
Code the most specific documented metabolic disorder first; use E88.8 only when no better-defined code applies.