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O11.9

Billable

Pre-existing hypertension with pre-eclampsia, unspecified trimester

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A condition where a pregnant woman with pre-existing high blood pressure develops pre-eclampsia, but the specific timing during pregnancy is not documented.

Coding Tips

  • •Use only when trimester is unknown or not documented; otherwise use more specific codes O11.1-O11.5
  • •Requires confirmation of both pre-existing hypertension and pre-eclampsia

Code Hierarchy

└O11Pre-existing hypertension with pre-eclampsia└O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimester
└O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimester

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