ICD-10 Code E10.40 – Type 1 diabetes mellitus with diabetic neuropathy, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.40 – Type 1 diabetes mellitus with diabetic neuropathy, unspecified
What it is
This code identifies type 1 diabetes mellitus complicated by diabetic neuropathy when the specific neuropathy type is not documented. Use it when the record confirms diabetic nerve involvement but does not specify a more precise form.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include numbness, tingling, burning pain, reduced sensation, or other nerve-related symptoms attributed to diabetes.
When to use this code
Use E10.40 when the provider documents type 1 diabetes and diabetic neuropathy, but does not name the neuropathy as peripheral, autonomic, or another specified type. It also fits when the note states neuropathy due to diabetes without further detail. If the chart later specifies the neuropathy type, code to the more specific option.
Do not use for
Do not use this code for diabetes without neuropathy, or when neuropathy is present but not linked to diabetes. Check documentation if the record only says “neuropathy” or names a different diabetes type.
Coding tip
Look for explicit provider linkage between type 1 diabetes and neuropathy before assigning E10.40.