Pregnancy related renal disease, first trimester

This code signifies the presence of new onset or worsening kidney disease directly attributable to the physiological changes of pregnancy, occurring specifically during the first trimester. This includes conditions like acute kidney injury, chronic kidney disease exacerbation, or other renal pathologies that manifest or are significantly impacted by gestation.

Apply this code when a pregnant patient in her first trimester is diagnosed with a renal condition that is either caused by or significantly complicated by the pregnancy. Documentation should clearly link the renal disease to the pregnancy and specify the first trimester.

• Ensure documentation explicitly states "first trimester" to support this specific code.
• Do not use for pre-existing renal conditions that are not exacerbated by pregnancy; consider codes from Chapter N (Diseases of the Genitourinary System) in conjunction with pregnancy codes.
• Always sequence this code as a secondary diagnosis when the primary reason for the encounter is related to the pregnancy itself (e.g., routine prenatal care).