Cerebral venous thrombosis in pregnancy, second trimester

This code signifies the presence of a blood clot in the cerebral veins or dural sinuses occurring during the second trimester of a pregnancy. This condition can lead to various neurological symptoms due to impaired blood drainage from the brain.

Apply this code when documentation explicitly states a diagnosis of cerebral venous thrombosis in a pregnant patient who is currently in her second trimester. Supporting documentation should include imaging reports confirming the thrombosis and a clear indication of the gestational period.

• Ensure the documentation specifies "second trimester" for accurate code assignment; otherwise, a different trimester-specific code or an unspecified trimester code may be more appropriate.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity affecting the patient's care.
• Do not confuse with cerebral arterial thrombosis or other cerebrovascular conditions; verify the venous nature of the clot.