ICD-10 Code E08.4 – Diabetes mellitus due to underlying condition with neurological complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.4 – Diabetes mellitus due to underlying condition with neurological complications
What it is
This code identifies diabetes caused by another underlying condition, with nerve-related complications. Use it when the record shows secondary diabetes and a documented neurologic manifestation.
Clinical signs
Clinical features vary; refer to documentation. Common neurologic findings may include neuropathy, numbness, tingling, pain, or other nerve dysfunction linked to diabetes.
When to use this code
Use E08.4 when the provider documents diabetes due to an underlying condition and also identifies a neurological complication. The record should connect the diabetes to the cause and the nerve complication to the diabetes. If the neurologic manifestation is not specified, check documentation.
Do not use for
Do not use this code for primary diabetes without an underlying cause, or for diabetes with non-neurologic complications. If the chart does not support a causal link, code the conditions separately if appropriate.
Coding tip
Always verify both the underlying condition and the specific neurologic complication before assigning E08.4.