Type 1 diabetes mellitus with diabetic mononeuropathy

This code signifies Type 1 diabetes complicated by damage to a single peripheral nerve. This mononeuropathy is a direct consequence of the diabetic condition, often manifesting as focal weakness, numbness, or pain in the distribution of the affected nerve.

Apply this code when documentation clearly states a diagnosis of Type 1 diabetes and identifies a specific mononeuropathy (e.g., carpal tunnel syndrome, peroneal nerve palsy) attributed to the diabetes. The physician's notes should explicitly link the nerve damage to the patient's diabetic status.

• Ensure the documentation specifies "Type 1" diabetes, not "Type 2" or "unspecified."
• Do not use this code for polyneuropathy; a different code exists for that condition.
• Verify the mononeuropathy is directly attributed to diabetes, not another cause like trauma or compression.