Contact no of vs contact number for

When I do drug histories ,sometimes, I have to ring the surgery to get some information or contact number of the person (may be a carer or a district nurses) who helps the patient at home e.g dressings change, administering injections etc.

Which preposition is correct and why in the above context.

Calling the GP surgery:

General introduction then

I was wondering if you have the contact no or have the information of or for xyz patient?