Toxic reaction to local anesth during preg, third trimester

This code signifies an adverse systemic response to a local anesthetic agent administered during the third trimester of pregnancy. This reaction is due to the toxic effects of the drug itself, rather than an allergic or anaphylactic response. Symptoms can range from mild neurological or cardiovascular effects to severe, life-threatening complications.

Apply this code when documentation clearly indicates a patient in her third trimester experienced a toxic reaction to a local anesthetic. This includes scenarios where the anesthetic was administered for dental procedures, regional blocks, or other localized interventions. Documentation should specify the type of reaction and its direct link to the local anesthetic.

• Differentiate from allergic reactions (T78.4-) or anaphylactic shock (T78.2-) to local anesthetics.
• Ensure the documentation explicitly states "toxic reaction" and the trimester of pregnancy.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if the toxic reaction complicates another condition.