Gestational htn w/o significant proteinuria, unsp trimester

This code signifies elevated blood pressure that develops during pregnancy in a patient who was previously normotensive, without evidence of proteinuria or other signs of pre-eclampsia. It represents a diagnosis of gestational hypertension where the specific trimester of onset is not documented.

Apply this code when a pregnant patient presents with new-onset hypertension (systolic BP ≥140 mmHg or diastolic BP ≥90 mmHg) after 20 weeks of gestation, but before delivery, and urinalysis is negative for significant proteinuria. Documentation should clearly state "gestational hypertension" without mention of proteinuria, and the trimester of onset is not specified.

• Do not use this code if proteinuria is present; consider codes for pre-eclampsia (O14.-).
• If the trimester of onset is documented, use the more specific O13.1 (first trimester), O13.2 (second trimester), or O13.3 (third trimester).
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when managing other pregnancy-related conditions.