PID-11 in HL7 v2: A Field Guide to Patient Address
PID-11 can repeat to carry a home address and a separate mailing address in the same field, but plenty of integrations only ever read the first repetition — which is fine until a patient with a different billing address gets their statement mailed to the wrong location.
PID-11 is the eleventh field of the HL7 v2 PID segment — it carries the patient’s address broken into street, city, state, zip, and country components, and can repeat when more than one address type is sent.
What this field contains
Example
PID-11 repeats twice here, once for a home address (H) and once for a mailing address (M) for the same patient. Synthetic patient — not a real person.
Where this trips people up
Billing and correspondence systems that only parse the first PID-11 repetition will send statements and letters to a patient’s home address even when a distinct mailing address was supplied. This kind of bug rarely shows up in testing because most synthetic test data only ever includes a single address repetition.