CPT® Code 64640

The procedure described by CPT® Code 64640 involves the destruction of a peripheral nerve or its branch using a neurolytic agent. This intervention is primarily aimed at alleviating chronic pain that may not respond to conventional treatments. The destruction can be achieved through various techniques, including the injection of a chemical neurolytic agent or the application of thermal, electrical, or radiofrequency methods. Among these, radiofrequency destruction has emerged as the most prevalent technique due to its effectiveness in targeting specific nerve pathways associated with pain syndromes. The process begins with the careful introduction of an electrode needle through the skin, which is then advanced toward the nerve tissue intended for treatment. This step is crucial as it allows for precise motor and sensory testing to confirm the correct positioning of the needle at the nerve responsible for the patient's pain. Once the appropriate nerve pathway is identified, the destruction of the nerve is performed. If a chemical neurolytic agent is utilized, it is injected along the nerve pathway to achieve the desired effect. Common neurolytic agents include phenol, ethyl alcohol, glycerol, ammonium salt compounds, and hypertonic or hypotonic solutions. Alternatively, thermal or electrical modalities involve the use of a probe or needle that generates heat to destroy the nerve tissue. In the case of radiofrequency nerve destruction, the electrode needle is positioned accurately, and the radiofrequency device is activated to produce an electric current that generates heat at the electrode's tip, effectively destroying the targeted nerve tissue. This procedure is coded under 64640 when there is no more specific code available for the destruction of the peripheral nerve or branch.