Before you receive care at Tri-Valley Ambulatory Surgery Center, we strongly recommend contacting your insurance company directly. You will likely need to provide them with our NPI and tax ID numbers to verify their participation as in-network providers for your specific insurance plan. If they’re out-of-network, be sure to find what you may need to spend out of your own pocket for care you know you’ll need now and would like to have in case your health needs change. Tri-Valley Ambulatory Surgery Center has a NPI and tax ID number: NPI: 1023692969 Tax ID Number: 84-3305341 Whenever you speak with health plan representatives, it is beneficial to write down the name and reference number of your conversation for future reference. If you have any further questions, email the Managed Care Department at: managedcare@stanfordhealthcare.org