Sendero is a non-profit, community-based health plan in the Austin area that provides vital, personalized care to the region. We have one of the largest networks of doctors and specialists of any health plan in the area - including those from Seton, St. David's, Austin Regional Clinic (ARC) and Austin Diagnostic Clinic (ADC).Providers‧Payments‧Member Benefits‧Contact Us‧About Sendero‧The Sendero Difference.