ROA Doctors Selected as NH and MA “Top Doctors of 2025”

Radiation Oncology Associates would like to congratulate Andy Singh, Etin Osa-Osa, William O’Meara, Vivek Patel, Klaudia Hunter, Jeffrey Lemons, Jeffrey Brower, Bryan Rowe, Brian Knab, Mat Katz, Asa Nixon, Su Metcalfe and Naomi Jiang for being selected for the distinguished honor of “Top Doctors” for 2025. This distinction is bestowed upon those doctors who have been voted by their peers as the top doctors in their given specialty, being known for providing excellent care.

Read more about the top Massachusetts doctors in Boston Magazine, the top New Hampshire doctors in NH Magazine, and view the full list of the 2025 Castle Connolly’s Top Doctors here.

Top Doctors of 2025

Headshot photo of ROA doctor Jeffrey Brower
Jeffrey Brower, MD, PhD
Dover, Manchester
Jeffrey Brower, MD, PhD
Asa J. Nixon, MD, MPH
Burlington, Peabody
Asa J. Nixon, MD, MPH
Klaudia Hunter, MD
Burlington , Lowell
Klaudia Hunter, MD
Brian R. Knab, MD
Londonderry, Manchester
Brian R. Knab, MD
Jeffrey Lemons, MD, MS
Dover, Peabody, Portsmouth
Jeffrey Lemons, MD, MS
Su Metcalfe, MD, MPH
Concord, Londonderry
Su Metcalfe, MD, MPH
William O’Meara, MD
Lowell
William O’Meara, MD
Etin-Osa Osa, MD
Burlington
Etin-Osa Osa, MD
Vivek Patel, MD, PhD
Lowell, Nashua
Vivek Patel, MD, PhD

Bryan Rowe, MD
Concord, Dover

Bryan Rowe, MD
H. Andy Singh, MD
Dover, Portsmouth
H. Andy Singh, MD
Headshot photo of ROA doctor Naomi Jiang
Naomi Jiang , MD
Burlington, Lowell
Naomi Jiang, MD