ICD-10 Code E09.41 – Drug or chemical induced diabetes mellitus with neurological complications with diabetic mononeuropathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E09.41 – Drug or chemical induced diabetes mellitus with neurological complications with diabetic mononeuropathy
What it is
This code identifies diabetes caused by a drug or chemical, with a nerve complication limited to one peripheral nerve. Use it when the record links the diabetes and the mononeuropathy to the same causative agent.
Clinical signs
Clinical features vary; refer to documentation. Typical mononeuropathy findings include localized numbness, pain, tingling, or weakness in the distribution of a single nerve.
When to use this code
Use E09.41 when the provider documents drug- or chemical-induced diabetes mellitus and specifically names diabetic mononeuropathy. The note should show a causal relationship, not just diabetes plus any neuropathy. If the nerve problem is described as polyneuropathy or another complication, check documentation before assigning this code.
Do not use for
Do not use this code for type 1 or type 2 diabetes, or for diabetes without a documented neurological complication. Do not use it when the neuropathy is not identified as mononeuropathy or when the cause is unclear.
Coding tip
Look for both the inducing substance and the specific nerve complication in the assessment, because E09.41 requires documentation of each.