Emergency: 119
AMDA-IMIC

O16 Unspecified maternal hypertension

Category / Non-billable header 6 subcodes

Block: Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)

Subcodes

Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.

Code Description Billable
O16..1 Unspecified maternal hypertension, first trimester Yes
O16..2 Unspecified maternal hypertension, second trimester Yes
O16..3 Unspecified maternal hypertension, third trimester Yes
O16..4 Unspecified maternal hypertension, complicating childbirth Yes
O16..5 Unspecified maternal hypertension, complicating the puerperium Yes
O16..9 Unspecified maternal hypertension, unspecified trimester Yes

Last reviewed: September 2026