Matern care for disproprtn d/t deformity of matern pelv bone

This code signifies a pregnancy complicated by a size mismatch between the fetus and the mother's pelvis, specifically caused by an abnormal shape or structure of the maternal pelvic bones. This disproportion can impede a vaginal delivery.

Apply this code when documentation clearly indicates that the mother's pelvic bone deformity is the underlying cause of fetopelvic disproportion during pregnancy. This diagnosis is typically made through clinical examination, pelvimetry, or imaging studies.

• Ensure documentation specifies "deformity of maternal pelvic bones" as the cause of disproportion, not other factors like fetal macrosomia alone.
• Consider sequencing this code as a principal diagnosis if it's the primary reason for the encounter, or as a secondary diagnosis if it complicates the pregnancy.
• Do not confuse with codes for disproportion due to other maternal or fetal causes (e.g., O33.1 for generally contracted pelvis, O33.2 for inlet contraction).