Matern care for disproprtn of mix matern & fetl origin, fts1

This code signifies maternal care for a pregnancy complicated by cephalopelvic disproportion (CPD) or fetopelvic disproportion (FPD) where the cause is attributed to a combination of both maternal pelvic factors and fetal size/presentation factors. It indicates that the disproportion is specifically affecting the first fetus in a multiple gestation pregnancy or is simply the only fetus being considered.

Use this code when documentation clearly states "mixed origin" or "maternal and fetal origin" disproportion, or when both maternal pelvic abnormalities (e.g., contracted pelvis) and fetal issues (e.g., macrosomia, abnormal lie) are identified as contributing to the inability for vaginal delivery. This code is appropriate when the obstetrician is actively managing this condition, often leading to a planned cesarean section.

• Ensure documentation specifies "mixed origin" or clearly identifies both maternal and fetal factors contributing to the disproportion.
• Distinguish from O33.0-O33.3 (disproportion of purely maternal or purely fetal origin) and O33.5-O33.7 (disproportion due to other or unspecified causes).
• The "1" in the seventh character indicates this applies to the first fetus; ensure this aligns with the patient's medical record for multiple gestations.