Gestatnl htn w/o significant proteinuria, second trimester

This code signifies new-onset hypertension (blood pressure $\ge$ 140/90 mmHg) occurring for the first time during the second trimester of pregnancy, specifically between 14 weeks 0 days and 27 weeks 6 days gestation. It is characterized by the absence of significant proteinuria (typically defined as < 300 mg in a 24-hour urine collection or a protein/creatinine ratio < 0.3).

Use this code when a pregnant patient develops hypertension during the second trimester without any evidence of proteinuria or other signs of pre-eclampsia. Documentation should clearly state the gestational age at diagnosis, blood pressure readings, and confirmation of no significant proteinuria. This code is appropriate for monitoring and managing gestational hypertension that has not progressed to pre-eclampsia.

• Ensure the documentation explicitly states the second trimester for the onset of hypertension.
• Distinguish carefully from pre-existing hypertension (O10.-) or pre-eclampsia (O14.-), which involves proteinuria or other severe features.
• If hypertension develops in the third trimester without proteinuria, a different code (O13.3) would be appropriate.