Antepartum hemorrhage, unspecified, first trimester

This code signifies any bleeding from the vagina during the first trimester of pregnancy (up to 13 weeks and 6 days gestation) where the specific cause of the hemorrhage is not documented or determined. It indicates an uninvestigated or undiagnosed source of bleeding in early pregnancy.

Use this code when a pregnant patient in her first trimester presents with vaginal bleeding, and the provider's documentation does not specify a definitive cause (e.g., threatened abortion, ectopic pregnancy, placental abruption). It is appropriate when the diagnosis is simply "antepartum hemorrhage, unspecified" or "vaginal bleeding in early pregnancy, cause unknown."

• Always seek clarification from the provider if a more specific diagnosis for the hemorrhage can be determined.
• Do not use this code if a definitive cause of bleeding, such as threatened abortion (O20.0) or ectopic pregnancy (O00.-), is documented.
• Sequence this code as the principal diagnosis if it is the primary reason for the encounter and no more specific diagnosis is established.