Physician Assistants (A-K)

Chief Physician Assistant

  • Roxanne Lightbody, MMSc, PA-C

    • Chief Physician Assistant

    Originally from Wisconsin, Roxanne Lightbody received her B.S. from the University of Dayton in Pre-medical studies with a minor in Psychology. She then attended Yale University's Physician Associate Program where she graduated with a Masters of Medical Science in 2006. After four years of working as a physician assistant for Mount Sinai's OB/GYN department, she joined the Hospitalist service in 2010.

Senior Physician Assistants

  • Janaira Caputo, PA-C

    • Senior Physician Assistant

  • Kate Gribetz, PA-C

    • Senior Physician Assistant

  • Marissa Machak, PA-C

    • Senior Physician Assistant
    Headshot of Marissa Machak, PA-C

  • Frances Pomerantz, PA-C

    • Senior Physician Assistant

    Franci Pomerantz attended St. John’s University where she received her Bachelor of Science in Physician Assistant Studies in 2012.  Franci joined the newly founded Nocturnalist service in October 2012 and is grateful to have the opportunity to practice medicine at NYP/Columbia. 

Hospitalist Physician Assistants (A-K)

  • Ankita Arora, PA-C

    • Per-Diem Physician Assistant

  • Brigid Brosnan, PA-C

    • Physician Assistant

  • Matthew Bundy, PA-C

    • Physician Assistant

  • Bianca Campanella-Santiago, PA-C

    • Physician Assistant

  • Sally Chan, PA-C

    • Physician Assistant

  • Kevin Chu, PA-C

    • Physician Assistant

  • Meghan Earl, PA-C

    • Physician Assistant

  • Jamie Frietag, PA-C

    • Physician Assistant

  • Marinique Dabissiere, PA-C

    • Physician Assistant

    Marinique Dabissiere attended FAU (Florida Atlantic Univeristy) where she received a Bachelor of Arts in Biology. She subsequently attended UMDNJ-RWJ PA program where she received a Master's degree in Physician Assisstant. She worked for six years in Interventional Cardiology at Lenox Hill Hospital, then joined the PA Medicine Service at NYP/Columbia in September 2010.

  • Rasheedah Grant, PA-C

    • Physician Assistant

  • Alexandra Grout, PA-C

    • Per-Diem Physician Assistant

  • Elizabeth Herbert, PA-C

    • Physician Assistant

  • Meghan Hileman, PA-C

    • Physician Assistant

  • Gabrielle Hilson, PA-C

    • Physician Assistant

  • Omar Ibrahim, PA-C

    • Physician Assistant

  • Erika Ikizake, PA-C

    • Physician Assistant

  • Jessica Jamin, PA-C

    • Physician Assistant

  • Harminder Kailey, PA-C

    • Physician Assistant

  • Preetkamal Kaur, PA-C

    • Physician Assistant

  • Andrea Kazlas, PA-C

    • Per-Diem Physician Assistant

    Andrea Kazlas was an English teacher and musician who became a Physician Assistant later in life. She started her medical career at the Montefiore Surgical Residency program, then worked briefly in Cardiothoracic Surgery before finding her niche in Internal Medicine. She is proud to be a founding member of the PACS service, and is grateful for the opportunity to participate in the excellence represented by NYP/Columbia.

  • Kellie Kolessar, PA-C

    • Physician Assistant