O10.911
BillableUnspecified pre-existing hypertension complicating pregnancy, first trimester
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A pregnant woman in her first three months of pregnancy who has high blood pressure that existed before she became pregnant.
Coding Tips
- •Confirm the trimester timing (first trimester is weeks 1-13) and ensure no secondary cause of hypertension is documented
- •Use this code only when the hypertension type is unspecified; if secondary hypertension or specific type is documented, use more specific codes
Code Hierarchy
└O10Pre-existing hypertension complicating pregnancy, childbirth and the puerperium└O10.9Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium└O10.91Unspecified pre-existing hypertension complicating pregnancy└O10.911Unspecified pre-existing hypertension complicating pregnancy, first trimester
└O10.911Unspecified pre-existing hypertension complicating pregnancy, first trimester