For Professionals In this section Healthcare Services Neurosurgery Overview Our Services Our Expertise Our Providers For Patients For Professionals DownloadNeurosurgery Referral GuidelinesReferral Center of Authorization Phone(408) 885-3820 Fax(408) 793-1892VHP Authorization Phone(408) 885-4647 option 4 Fax(408) 885-4875A physician may call (408) 885-5000 and have the operator call our on-call Neurosurgeon for urgent referrals.