E13.41

HCC Category Mapping

What This Code Means

A type of diabetes (not type 1 or type 2) causing damage to a single nerve, resulting in weakness or pain in specific areas of the body.

Coding Tips

• •Confirm documentation specifies mononeuropathy (single nerve involvement) rather than polyneuropathy
• •Document which nerve is affected if possible for clinical clarity

Clinical Significance

E13.41 captures diabetic mononeuropathy in other specified diabetes, indicating damage to a single peripheral nerve. Common presentations include cranial nerve palsies (particularly third nerve palsy causing diplopia), carpal tunnel syndrome, or femoral neuropathy. Mononeuropathy often has an acute onset and may partially resolve with glycemic control.

Documentation Requirements

• ✓The provider must document the secondary diabetes type, identify the specific nerve affected, and establish the diabetic etiology.
• ✓Clinical findings such as focal weakness, sensory loss in a single nerve distribution, or electrodiagnostic confirmation should be documented.

Commonly Confused Codes