Cerebral venous thrombosis in pregnancy, first trimester

This code signifies the presence of a blood clot within the cerebral venous system occurring during the first trimester of pregnancy. This condition can lead to various neurological symptoms due to impaired blood drainage from the brain.

Apply this code when documentation confirms a diagnosis of cerebral venous thrombosis in a pregnant patient whose gestational age is within the first trimester (weeks 1-13). Supporting documentation should include imaging studies confirming the thrombosis and a clear indication of the pregnancy trimester.

• Always confirm the specific trimester of pregnancy documented by the provider.
• Do not confuse with cerebral arterial thrombosis or non-pregnancy related cerebral venous thrombosis.
• Code any associated neurological complications, such as seizures or stroke, separately.