Eclampsia complicating pregnancy, unspecified trimester

This code signifies the occurrence of eclampsia, a severe complication of pregnancy characterized by new-onset grand mal seizures in a woman with pre-eclampsia, where the specific trimester of pregnancy is not documented. It indicates a life-threatening condition for both mother and fetus, requiring immediate medical intervention.

Apply this code when a pregnant patient presents with eclamptic seizures and the medical record does not specify the trimester during which the eclampsia occurred. Documentation should clearly state "eclampsia" or "eclamptic seizures" in the context of pregnancy, without further detail regarding the trimester.

• Do not use this code if the trimester is documented; instead, select the appropriate O15.0- subcategory specifying the trimester.
• Always sequence this code as a primary diagnosis if it is the reason for the encounter, followed by codes for any associated complications.
• Ensure documentation differentiates eclampsia from other seizure disorders occurring during pregnancy, such as epilepsy.