Algoneurodystrophy, unspecified site

This code signifies algoneurodystrophy, also known as complex regional pain syndrome (CRPS) type I, without a specified anatomical location. It describes a chronic, progressive condition characterized by severe pain, swelling, and trophic changes in an extremity, typically following trauma or surgery, but without direct nerve injury. The "unspecified site" indicates that the specific body part affected is not documented.

Use this code when the medical record clearly diagnoses algoneurodystrophy or CRPS Type I, but the documentation does not specify the affected limb or body region. This code is appropriate when the provider's notes confirm the presence of the syndrome without further anatomical detail.

• Avoid using this code if the documentation specifies the affected site (e.g., upper limb, lower limb); instead, use a more specific code from the M89.0- series.
• Ensure the documentation supports the diagnosis of CRPS Type I (algoneurodystrophy) and not CRPS Type II (causalgia), which involves confirmed nerve injury.
• Query the provider for clarification of the affected site if possible, to allow for more specific coding and better data granularity.