If an Alberta patient has given an invalid PHN, or don't know their PHN you can call the Registration Research Unit at 780.415.2288. You are limited to 3 PHN's per call and will require the patient's full name and birthdate, as well, you may be required to provide physician and service date information. If you do not have all of the required information, you may be provided with a form AHC0406 and requested it be faxed in to 780.415.1704.
Alternatively, if you have been set up with Netcare, you can look up the patient's details by logging on to https://access.albertanetcare.ca/vpn/index-anc.html with your Netcare fob.
Note, this only available for in-province Alberta patients. For out of province patients with the incorrect info, you may need to contact the patient's home Ministry of Health for more information.