In simple words: This code is used when a pregnant woman has a health condition, not directly related to pregnancy, that either makes her pregnancy more difficult, is worsened by the pregnancy, or becomes the main reason she needs care from a doctor or midwife.

This code encompasses other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth, and the puerperium. It includes conditions that complicate the pregnant state, are aggravated by the pregnancy, or are a main reason for obstetric care.Use an additional code to identify the specific condition.

Example 1: A pregnant woman with pre-existing systemic lupus erythematosus (SLE) experiences a flare-up during her pregnancy. The SLE is complicating her pregnancy and requires additional monitoring and treatment., A pregnant woman with chronic kidney disease requires ongoing nephrology care throughout her pregnancy. The pregnancy adds stress to her kidneys and requires careful management to ensure both maternal and fetal well-being., A pregnant woman develops severe pelvic pain during her second trimester, requiring pain management and physical therapy. While not a pregnancy-specific condition, the pelvic pain is directly related to the pregnancy and requires specialized care.

Documentation should clearly indicate the pre-existing condition and how it complicates, is aggravated by, or necessitates obstetric care during the pregnancy, childbirth, or puerperium. An additional code should be used to identify the specific condition.