Pregnancy related renal disease, third trimester

This code signifies the presence of new onset or exacerbation of kidney disease directly attributable to the physiological changes of pregnancy, specifically occurring during the third trimester. This includes conditions like acute kidney injury, chronic kidney disease progression, or other renal pathologies that manifest or worsen due to gestation.

Apply this code when documentation clearly indicates a renal condition that is either caused by or significantly impacted by the pregnancy, and the patient is in her third trimester. Supporting documentation would include physician notes detailing the renal diagnosis, its relationship to the pregnancy, and the gestational age.

• Always confirm the trimester documented in the medical record.
• Distinguish from pre-existing renal conditions not exacerbated by pregnancy (O99.81-).
• Code any specific renal condition (e.g., N17.9 for acute kidney failure) as a secondary diagnosis.