Pre-exist hyp heart disease comp pregnancy, unsp trimester

This code signifies a patient with a pre-existing diagnosis of hypertensive heart disease who is currently pregnant. It indicates that the cardiac condition, specifically involving the heart and caused by hypertension, is complicating the pregnancy, without specifying the trimester.

Apply this code when documentation clearly states a pre-existing diagnosis of hypertensive heart disease in a pregnant patient. This code is appropriate when the medical record does not specify the trimester of pregnancy during which the complication is being addressed.

• Always sequence this code as a primary diagnosis when the hypertensive heart disease is the main reason for the encounter during pregnancy.
• Ensure documentation explicitly states "pre-existing" to differentiate from gestational hypertension or pre-eclampsia.
• Do not use this code if the documentation specifies a particular trimester; instead, use the more specific O10.111, O10.112, or O10.113.