Type 2 diabetes mellitus with diabetic mononeuropathy

This code signifies a diagnosis of type 2 diabetes mellitus complicated by diabetic mononeuropathy. Diabetic mononeuropathy is a form of nerve damage affecting a single nerve, often presenting as sudden onset weakness or sensory loss in the distribution of that nerve, directly attributable to the patient's diabetes.

Apply this code when documentation explicitly states type 2 diabetes and a specific diagnosis of diabetic mononeuropathy, such as diabetic oculomotor palsy or diabetic femoral neuropathy. Supporting documentation should include diagnostic findings confirming both the diabetes and the mononeuropathy, often through neurological examination or nerve conduction studies.

• Always sequence the diabetes code first, as it is the underlying condition.
• Do not confuse with diabetic polyneuropathy (E11.42) which affects multiple nerves.
• Ensure the documentation clearly links the mononeuropathy as a complication of the diabetes.