Matern care for abnlt fetl hrt rate or rhym, 1st tri, fts5

This code signifies antenatal care provided to a pregnant patient in her first trimester due to an identified abnormality in the heart rate or rhythm of the fifth fetus in a multiple gestation pregnancy. This includes conditions such as fetal bradycardia, tachycardia, or arrhythmias detected early in gestation. The maternal care is specifically directed at monitoring and managing the pregnancy in light of this fetal cardiac concern.

Use this code when documentation clearly indicates maternal care for an abnormal fetal heart rate or rhythm in the first trimester, specifically for the fifth fetus in a multifetal pregnancy. This typically involves findings from early ultrasound examinations, Doppler studies, or other fetal monitoring techniques that identify a cardiac rhythm disturbance. Supporting documentation should specify the trimester, the nature of the fetal cardiac abnormality, and the specific fetus affected.

• Ensure the documentation explicitly states "first trimester" and identifies the "fifth fetus" in a multiple gestation.
• Do not use this code if the abnormality is identified in a different trimester or affects a different fetus.
• Sequence this code as a secondary diagnosis following the code for the specific fetal heart rate or rhythm abnormality (e.g., O42.1xx for premature rupture of membranes with onset of labor).