Pre-exist hyp chronic kidney disease comp preg, unsp tri

This code signifies a pregnancy complicated by a patient's pre-existing chronic kidney disease (CKD) that is secondary to or exacerbated by pre-existing hypertension. It indicates that the CKD was present before the current pregnancy and is now impacting the pregnancy's course, with the specific trimester of pregnancy not documented.

Use this code when documentation clearly states a pregnant patient has a history of hypertension leading to chronic kidney disease, and this condition is noted as complicating the current pregnancy. This applies when the medical record does not specify the trimester of pregnancy during which this complication is being addressed.

• Always sequence this code as a primary diagnosis when it is the main reason for the encounter, followed by codes for the specific type and stage of CKD (e.g., N18.x) and pre-existing hypertension (I10).
• Ensure documentation explicitly links the CKD to pre-existing hypertension and confirms its impact on the pregnancy.
• Avoid using this code if the hypertension or CKD developed during the current pregnancy (gestational hypertension or pre-eclampsia with CKD).