G99.0

What This Code Means

This code describes damage to the nerves that control automatic body functions (like heart rate, blood pressure, and digestion) that occurs as a complication of another disease. It is used when autonomic nerve damage is secondary to an underlying condition rather than a primary disorder.

Coding Tips

• •This is a secondary diagnosis code that requires an underlying condition code to be reported first; identify the primary disease causing the autonomic neuropathy (such as diabetes, amyloidosis, or Parkinson's disease)
• •Verify documentation clearly states autonomic neuropathy as a manifestation of the primary condition; do not use this code for primary autonomic neuropathies, which have their own specific codes in the G60-G65 range