4 Dobson Way,
Merrimack, NH, 03054
Monday - Friday: 8 a.m. to 5 p.m.
Accepting New Patients
Graduate School: MSN, Rivier University, Nashua, NH
“So caring, understanding, and patient. Cathy is passionate about her patients and works hard to keep them well (mentally, physically, and socially). My family and I are blessed by her care and are so thankful we found St. Joseph Hospital Family Medicine & Specialty Services in Merrimack.” – Lynn
“Cathy O’Donnell is fantastic, both my daughter and I see her. She is very thoughtful. Takes time to listen to what you are saying and makes you feel like you are being heard. She is knowledgeable and incredibly passionate about her care.” – Eric
“Very happy with my care over the past few years with Cathy O’Donnell and her nurse Kelly. They always go above and beyond! (The entire staff) is always so kind and welcoming, the rooms/offices are always clean and they always get back to you quickly! I would recommend this office to anyone asking/looking.” – Christina