Family history of consanguinity

This diagnosis code indicates a family history of marriage or reproduction between individuals who are closely related by blood. This genetic relationship increases the risk of offspring inheriting autosomal recessive disorders or other genetic conditions due to the higher probability of sharing deleterious recessive alleles.

Apply this code when a patient's family history reveals consanguineous relationships, particularly when evaluating for genetic disorders, reproductive counseling, or unexplained medical conditions that may have a genetic basis. It is relevant for risk assessment and guiding genetic testing decisions.

• Always document the specific family relationship (e.g., first cousins, uncle-niece) if known.
• This code is for family history, not for the patient themselves being a product of consanguinity (which would be implied by the family history).
• Use as a secondary diagnosis to provide context for other genetic or reproductive health diagnoses.