Matern care for known or susp placntl insuff, 2nd tri, oth

This code signifies ongoing medical supervision and management for a pregnant patient in her second trimester where there is a pre-existing diagnosis or strong suspicion of the placenta not functioning adequately to support fetal growth and well-being. This condition can lead to restricted fetal growth and other complications. This specific code applies when the placental insufficiency affects a fetus other than the primary one in a multiple gestation pregnancy.

Use this code when documentation indicates maternal care for a known or suspected placental insufficiency during the second trimester of a multiple gestation pregnancy, and the concern is for a fetus other than the one designated as primary. This would be supported by ultrasound findings (e.g., abnormal umbilical artery Doppler, fetal growth restriction), maternal history, or clinical assessment.

• Ensure the documentation clearly specifies "second trimester" and "other fetus" in a multiple gestation.
• Do not confuse with codes for placental insufficiency affecting the primary fetus (O36.511-) or unspecified fetus (O36.519-).
• Always sequence this code as a secondary diagnosis, with a code from category Z3A.- (Weeks of gestation) as the primary diagnosis, if applicable.