Proven by history, focused on the future

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Our mission

We’re in the business of improving people’s lives. Our leading-edge laboratory facilities are central to that mission, as are our people who ensure we’re responsive and beneficial to the ever-changing world around us.

20+ years of innovation

At Ascend, we’ve been and remain steadfast in our focus on and commitment to continuous improvement and innovation, propelling us from an entrepreneurial startup to a prestigious, nationally recognized independent laboratory with expansive testing and research capabilities, proprietary customer enablement technologies, and partnerships with respected institutions and organizations like Stanford University and Siemens.

  • 2000
  • Founded as a clinical reference lab in Silicon Valley

    Started with a few desktop analyzers in a space smaller than a one-car garage

  • 2001
  • Launched LabCheck – 1st web-based ordering and reporting platform

  • 2003
  • Moved to a new, 35,000 square-foot laboratory in Redwood City

  • 2014
  • Launched Ascend University – 1st online training program for clinic staff

  • 2020
  • Scaled up major COVID-19 testing and research program

  • 2022
  • Opened state-of-the-art 100,000 square-foot facility in Sunnyvale, CA

  • 2022
  • Expand relationship with Siemens Healthineers by outfitting laboratory with over 40 Atellica® Solution analyzers

  • 2022
  • First lab to use SambaNova Systems and DeLorean (AI) – based renal care software

  • 2023
  • One of the largest and busiest clinical laboratories in the US

    Performs up to 1 million tests per day

    Serves 98% of the independent dialysis clinics in the US and a dozen foreign countries

    Committed to Excellence


    Ascend is a fully accredited, independent laboratory, licensed to operate in a number of states.

    View our certificates

    Ethics & compliance

    Ascend’s ethical standards reflect a commitment to respect clients, patients, staff, and the laws and regulations that govern our industry.

    Our standards

    Meet our leadership team


    Patricia Hunsader, MT, CLS, ASCP

    Chief Operating Officer

    In the past 20 years, Patti Hunsader has provided operational direction and oversight for a range of facilities from start-up laboratories to large volume reference laboratory operations.

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    Jeffrey Vizethann

    Executive Vice President, Sales

    Jeffrey Vizethann has worked side-by-side with clinicians for more than two decades to understand and apply technical solutions to their laboratory services needs.

    Read more

    Join us on our mission

    Regardless of role, our employees have the latest tools and technologies available to perform their best work, and that benefits us all.

    View our current openings

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