Pre-exist hyp heart disease comp pregnancy, second trimester

This code signifies a pregnant patient in her second trimester who has a pre-existing diagnosis of hypertensive heart disease. This condition involves structural and/or functional changes to the heart due to chronic hypertension, which is now impacting the current pregnancy. It indicates that the pre-existing cardiac condition is a complicating factor during this specific gestational period.

Apply this code when documentation clearly states a pre-existing diagnosis of hypertensive heart disease in a pregnant patient. The medical record must also specify that the patient is currently in her second trimester and that the cardiac condition is complicating the pregnancy. This code is appropriate for inpatient and outpatient encounters where this specific clinical scenario is managed.

• Ensure documentation explicitly states "pre-existing" hypertensive heart disease to differentiate from gestational hypertension or pre-eclampsia.
• Verify the trimester is clearly documented as "second trimester" (weeks 14-27) for accurate code assignment.
• Always sequence this code as a primary diagnosis when it is the main reason for the encounter, or as a secondary diagnosis when it is a significant co-morbidity complicating the pregnancy.