Encounter for Rh incompatibility status

This code indicates that a patient has a known Rh incompatibility, meaning the mother is Rh-negative and the fetus/father is Rh-positive. This condition carries a risk of hemolytic disease of the fetus and newborn (HDFN) in subsequent pregnancies if not properly managed.

Use this code for encounters where the patient's Rh incompatibility status is being monitored or managed, such as during routine prenatal care for an Rh-negative mother. It is also appropriate when documenting the status for future pregnancy planning or counseling.

• This code is for the status of Rh incompatibility, not for the actual disease (HDFN) if it occurs.
• Always sequence this code as a secondary diagnosis when the primary reason for the encounter is related to the pregnancy or other medical conditions.
• Do not use this code if the patient is Rh-negative but there is no known Rh incompatibility (e.g., the father is also Rh-negative).