E10.43

HCC Category Mapping

What This Code Means

This code describes a patient with Type 1 diabetes who has developed nerve damage affecting the autonomic nervous system, which controls involuntary body functions like heart rate, digestion, and blood pressure. This is a complication of long-standing diabetes that requires careful management.

Coding Tips

• •Verify that the patient has a confirmed diagnosis of Type 1 diabetes (not Type 2) and documented autonomic neuropathy symptoms such as gastroparesis, orthostatic hypotension, or cardiac arrhythmias before assigning this code
• •This is a combination code that includes both the diabetes and the neuropathy complication, so do not code them separately; ensure documentation clearly links the neuropathy to the diabetes

Clinical Significance

Type 1 diabetes mellitus with diabetic autonomic neuropathy represents damage to the nerves controlling involuntary body functions, carrying the highest mortality risk among diabetic neuropathy subtypes. Cardiac autonomic neuropathy can cause resting tachycardia, exercise intolerance, orthostatic hypotension, and silent myocardial ischemia, with 5-year mortality rates up to 50% in symptomatic patients. Gastrointestinal autonomic neuropathy causes gastroparesis, diarrhea, and constipation, while genitourinary involvement leads to neurogenic bladder and sexual dysfunction.

Documentation Requirements

• ✓Type 1 diabetes must be confirmed.
• ✓Specific autonomic dysfunction symptoms and signs must be documented, including cardiovascular (orthostatic vital signs, heart rate variability), gastrointestinal (gastric emptying studies), urological (post-void residuals), and sudomotor (sweating abnormalities) assessments.
• ✓Diagnostic testing results confirming autonomic dysfunction should be referenced.
• ✓The link between Type 1 diabetes and autonomic dysfunction must be clearly established.

Commonly Confused Codes