Placenta accreta, unspecified trimester

This diagnosis code signifies a condition where the placenta abnormally attaches to the uterine wall, penetrating the endometrium but not the myometrium, without further specification of the gestational trimester. It represents a serious obstetric complication that can lead to significant hemorrhage during delivery.

This code is appropriate when documentation confirms a diagnosis of placenta accreta, and the specific trimester of pregnancy is not recorded or is unknown. It should be used when the placental attachment is superficial to the myometrium, differentiating it from increta or percreta.

• Do not use this code if the documentation specifies placenta increta or percreta; use the more specific codes for those conditions.
• Ensure the medical record clearly states "placenta accreta" and lacks trimester information to support this unspecified code.
• Sequence this code as a principal diagnosis when it is the primary reason for the admission, or as a secondary diagnosis if it complicates another condition.