Toxic reaction to local anesth during preg, second trimester

This code signifies an adverse systemic response to a local anesthetic agent administered during the second 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 disturbances to severe systemic toxicity.

Apply this code when documentation clearly indicates a toxic reaction to a local anesthetic in a pregnant patient during her second trimester. This includes scenarios where the anesthetic was administered for dental procedures, minor surgical interventions, or regional blocks. The medical record should specify the type of reaction as toxic, not allergic.

• Always confirm the trimester of pregnancy documented in the patient's record.
• Distinguish between a toxic reaction (O29.3X-) and an allergic reaction (O29.1X-).
• Code also the specific manifestation of the toxic reaction, if documented (e.g., convulsions, cardiac arrhythmia).