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Business Details
42 Years
experience
Your Trusted Internal Medicine Provider in Southern New Hampshire
Southern New Hampshire Internal Medicine has been dedicated to providing comprehensive adult healthcare since 1984. Founded by Douglas M. Eddy, MD, our practice has grown into one of the largest physician-owned primary care groups in New Hampshire, serving communities in Derry, Windham, and Bedford. Our team of board-certified physicians, specialists, and advanced practitioners combines decades of experience with a patient-centered approach, prioritizing preventative care and long-term wellness. We utilize cutting-edge medical technology while maintaining a focus on personalized relationships, ensuring each patient receives tailored care that addresses their unique needs.

Our commitment to excellence is reflected in our affiliations with leading healthcare organizations, including the Medicare Shared Savings Program and VillageMD, which enhance our ability to deliver high-quality, cost-effective services. Through our state-of-the-art facilities at Overlook Medical Park and other locations, we offer integrated care with on-site imaging, lab services, and specialty partnerships, making healthcare more accessible and efficient for our patients.
Services
Internal Medicine Primary Care Telehealth Lab Tests Imaging Urgent Care Chronic Disease Management Annual Wellness Visits Women's Health Cardiology
Details
  • Year established: 1984
Highlights and features
  • We have over 40 years of experience in adult healthcare.
  • Our team includes board-certified physicians and specialists.
  • We offer integrated care with on-site imaging and lab services.
  • We prioritize personalized, patient-centered relationships.
  • Our providers are recognized for lower hospital readmission rates.
Associations and certifications
  • Medicare Shared Savings Program
  • American College of Radiology (ACR)
What people say
Listens to your concerns Thorough examinations Caring bedside manner Personalized treatment plans Timely appointments
Services
Internal Medicine
Our internal medicine specialists provide comprehensive care for adults aged 18+. We diagnose and treat complex chronic conditions while emphasizing preventive care. Our board-certified physicians manage diabetes, hypertension, heart disease, and other chronic illnesses through personalized treatment plans. Patients benefit from coordinated care with specialists at our integrated medical facilities.
Primary Care
As primary care providers, we serve as your first point of contact for health concerns. Our team offers routine check-ups, vaccinations, and health screenings while maintaining continuity of care. We coordinate specialist referrals and manage overall wellness through annual wellness visits and preventive health strategies tailored to individual needs.
Telehealth
Our telehealth platform enables remote consultations for non-emergency conditions. Patients can connect with providers through secure video visits for medication management, follow-ups, and minor acute issues. This service maintains care continuity while offering flexibility for patients in Derry, Windham, and Bedford communities.
Imaging Services
On-site imaging centers at our Derry and Windham locations offer MRI, CT scans, digital mammography, and ultrasound. Accredited by the American College of Radiology, these services provide convenient access to advanced diagnostics under one roof, reducing the need for multiple appointments.
Chronic Disease Management
We specialize in managing chronic conditions like diabetes, COPD, and congestive heart failure. Our approach combines medication management, lifestyle modifications, and regular monitoring. Patients receive personalized care plans developed through collaborative decision-making with their primary care provider.
People
Patrick Carolan
PA-C
Physician Assistant Patrick Carolan provides comprehensive primary care with a focus on patient education. With over 20 years of experience, he emphasizes preventive medicine and chronic disease management while maintaining a compassionate approach to individual patient needs.
Paul Macdonald
MD
Dr. Paul Macdonald specializes in internal medicine with particular expertise in complex diagnostic cases. Recognized for saving lives through early detection of serious conditions, he combines clinical excellence with personalized care for patients in southern New Hampshire.
Anne Thomassen
ARNP
Advanced Registered Nurse Practitioner Anne Thomassen has served patients for nearly two decades. Known for her thorough virtual and in-person visits, she builds lasting relationships while managing comprehensive healthcare needs with a focus on women's health.
Todd Mellish
DO
Dr. Todd Mellish has provided continuous primary care for over 25 years. His practice emphasizes patient education and preventive care, with multiple patients noting his exceptional follow-up communication and ability to explain complex medical information clearly.
Marcio Jablonka
MD
Board-certified internist Dr. Marcio Jablonka specializes in adult healthcare with a focus on chronic condition management. Patients consistently praise his attentive listening skills and ability to coordinate complex care needs within our integrated medical network.
Questions
What services does Southern New Hampshire Internal Medicine offer?
We provide internal medicine, primary care, telehealth visits, lab testing, imaging services, urgent care, chronic disease management, and preventive wellness exams.
Do you accept new patients?
Yes, we welcome new patients at all our locations in Derry, Windham, and Bedford, NH.
What insurance plans do you accept?
We are preferred providers for most major insurance plans with typically $5 copays. Contact us if your plan isn't listed.
Are virtual appointments available?
Yes, we offer telehealth consultations for established patients across all our service areas.
What makes your practice unique?
As physician-owned specialists in adult medicine, we combine personalized care with integrated services at our multi-specialty medical parks.
Reviews (4)
RCboater Bill
Jun 04, 2022 Report
Every encounter I have had with the Doctors and staff at SNHIMA has been great-- I have no complaints at all! I am VERY pleased with Dr. Hong-- every time I see him, I leave thinking what a great Dr he is. He is attentive, listens, and gives clear answers to questions. I feel like I have a great partner in managing my health!
Kris Vn
Jun 02, 2022 Report
Colleen Taylor was the BEST! Personable, funny, and friendly! She is, by far, the best experience that I've had there. She was very willing to work with me. She made me feel comfortable and cared for! Thank you!
Steven Doyle
May 28, 2022 Report
Dr. J was terrific spent the time to necessary to examine my medical issue and provide solutions. The practice managed to get me an appointment the day after I called with my issue of concern. I greatly appreciated their accommodating my need to see a medical professional before the long weekend.
Brett Wigfall
May 22, 2022 Report
My experience with Dr. Jonnalagadda has been great visits literally from start to finish the hole staff make me feel very comfortable and everyone has smiles on there faces rain or shine and the attention to care is 2nd to none. Dr Jonnalagadda, is by far the best Dr. I've ever had due to his way of always trying to understand my ups and downs as far as my leg & back. It's the care and the decent way they treat me as a patient is why I give this office 5 's