Each member of the US Radiology team brings skills and experience critical to our collective success. We’re here as resources for our partners, offering business leadership, financial expertise and operational support.

US Radiology Executive Team

  • John Perkins

    John Perkins

    Chief Executive Officer
  • Diane Kazmierski

    Diane Kazmierski

    Executive Vice President,
    Managed Care
  • Gerry Lewis

    Gerry Lewis

    Chief Information Officer
  • Wood Lovell

    Wood Lovell

    Chief Administrative Officer
  • Clete Madden

    Clete Madden

    Health Systems & OIS Business Development
  • Ken McNish

    Ken McNish

    President, Physician Practices
    & Chief Strategy Officer
  • Wayne Orvis

    Wayne Orvis

    Chief Operating Officer
  • Robert O’Sullivan

    Robert O’Sullivan

    Chief Development Officer
  • Julie Szeker

    Julie Szeker

    General Counsel
  • David Wagnon

    David Wagnon

    Chief Financial Officer
  • Mark Jensen

    Mark Jensen

    Special Advisor

US Radiology National Leadership Team

  • Dan Balentine

    Dan Balentine

    Group President,
    Outpatient Imaging Services
  • Rian Balfour

    Rian Balfour

    Deputy General Counsel
  • Jennifer Bibles

    Jennifer Bibles

    Group President,
    Outpatient Imaging Services
  • Chris Core

    Chris Core

    Chief Commercial Officer
  • Michael Cross

    Michael Cross

    Senior Vice President,
  • John Devlin

    John Devlin

    CFO, Physician Practices
    and Senior Vice President, Finance
  • Ben Dunford

    Ben Dunford

    Practice CEO,
    Diversified Radiology
  • Maviea Easter

    Maviea Easter

    Vice President,
    Outpatient Imaging Technology
  • Rick Grodin

    Rick Grodin

    Practice CEO,
    South Jersey Radiology Associates
  • John Guess

    John Guess

    Chief Accounting Officer
  • Barry Jenkins

    Barry Jenkins

    CFO, Outpatient Imaging Services
  • Ronni Kleypas

    Ronni Kleypas

    Chief Integration Officer
  • Jill Lewandowski

    Jill Lewandowski

    Vice President,
    Human Resources
  • Lynn McGivern

    Lynn McGivern

    Chief Compliance Officer
  • Lindsay Muns

    Lindsay Muns

    Group President, Physician Practices
    CEO, Charlotte Radiology and Upstate Carolina Radiology
  • Julie Nitsche

    Julie Nitsche

    Practice CEO,
    Windsong Radiology
  • Ryan Popp

    Ryan Popp

    Senior Vice President,
    Business Development
  • Chris Robertson

    Chris Robertson

    Senior Vice President,
    Revenue Cycle Management
  • Logan Ward

    Logan Ward

    Practice CEO,
    Radiology Ltd.



Since 1979, Welsh, Carson, Anderson & Stowe (WCAS) has been partnering with top management teams to build leading healthcare and technology companies. Their long track record of driving growth for physician practices across a range of specialties and total capital raised of $22 billion across 16 partnerships makes WCAS uniquely positioned to maximize the value of practices within US Radiology.

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US Radiology is building the nation's premier radiology partnership. If your organization shares our values, let's connect.

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