| O13 | Gestational [pregnancy-induced] hypertension without significant proteinuria | NON-BILLABLE CODE |
| O13.1 | Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester | BILLABLE CODE |
| O13.2 | Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester | BILLABLE CODE |
| O13.3 | Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester | BILLABLE CODE |
| O13.5 | Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium | BILLABLE CODE |
| O13.9 | Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester | BILLABLE CODE |
