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Your Trusted Internal Medicine & Primary Care Provider in New Hampshire
Southern New Hampshire Internal Medicine has been dedicated to providing exceptional adult healthcare since its establishment. Our team of board-certified physicians, certified physician assistants, and nurse practitioners combines extensive medical expertise with a patient-centered approach to address the full spectrum of adult health needs. We specialize in internal medicine, primary care, chronic disease management, and preventive care, utilizing advanced diagnostic tools and evidence-based practices.

With locations in Derry, Windham, and Bedford, New Hampshire, we offer convenient access to comprehensive services including cardiology, rheumatology, diabetes management, and telehealth appointments. Our practice emphasizes personalized care, fostering long-term doctor-patient relationships built on trust, transparency, and active patient involvement in healthcare decisions. We maintain affiliations with leading medical institutions to ensure patients receive coordinated specialty care when needed.
Services
Internal Medicine Primary Care Physical Exams Cardiology Telehealth Lab Tests Urgent Care Women's Health Diabetes Management Annual Wellness Visit
Highlights and features
  • We offer 30+ years of combined experience in adult healthcare
  • Our providers maintain board certification in internal medicine
  • We provide same-day/next-day urgent care appointments
  • Our practice features on-site diagnostic imaging and lab services
  • We offer telehealth appointments for remote medical consultations
What people say
Thorough examinations Compassionate providers Excellent communication Personalized care plans Timely appointments
Services
Internal Medicine
Our internal medicine specialists provide comprehensive care for adult patients, focusing on prevention, diagnosis, and treatment of complex medical conditions. We address multiple health issues simultaneously while coordinating specialty care when needed. Our approach emphasizes evidence-based medicine combined with personalized treatment plans tailored to each patient's unique health profile and lifestyle needs.
Primary Care
As primary care providers, we serve as your first point of contact for all health concerns, offering routine check-ups, preventive screenings, and chronic disease management. Our team coordinates comprehensive care across different medical specialties while maintaining continuity of treatment. We emphasize health promotion and early detection of potential health issues through regular wellness visits.
Cardiology
Our cardiology services include non-invasive diagnostic testing and management of cardiovascular conditions. We offer stress testing, echocardiography, and Holter monitoring in partnership with New England Heart Institute. Our approach combines lifestyle modifications, medication management, and specialist coordination to optimize heart health and prevent complications from cardiovascular diseases.
Telehealth
Our telehealth platform enables remote medical consultations through secure video conferencing. Patients can receive follow-up care, medication refills, and treatment for minor illnesses from any location with internet access. This service maintains the same high standards of care while offering greater convenience and accessibility for patients with mobility challenges or busy schedules.
Physical Exams
We conduct comprehensive physical examinations tailored to individual health needs, including annual wellness visits and gender-specific screenings. Our exams incorporate preventive testing, health risk assessments, and personalized recommendations for maintaining optimal health. We emphasize patient education to promote informed decision-making about preventive care and lifestyle modifications.
People
Wendee Amero
APRN
Wendee Amero, APRN, provides comprehensive primary care with a focus on patient education and preventive medicine. She takes time to understand each patient's health history and develops personalized care plans that address both immediate concerns and long-term wellness goals.
Patrick Carolan
PA-C
Patrick Carolan, PA-C, specializes in adult healthcare with emphasis on chronic disease management and preventive care. He builds strong patient relationships through attentive listening and clear communication about treatment options, ensuring patients understand their health conditions and care plans.
Dr. Paul Macdonald
MD
Dr. Paul Macdonald, MD, brings decades of experience in internal medicine to his practice. He focuses on comprehensive patient care, combining clinical expertise with compassionate treatment. His approach emphasizes thorough evaluations and coordinated care for patients with complex medical needs.
Dr. Todd Mellish
DO
Dr. Todd Mellish, DO, provides patient-centered primary care with emphasis on holistic treatment approaches. He specializes in managing chronic conditions while maintaining focus on overall patient wellness. His practice incorporates osteopathic principles to address musculoskeletal concerns alongside general healthcare needs.
Anne Thomassen
ARNP
Anne Thomassen, ARNP, delivers personalized primary care with special attention to patient education and preventive health strategies. She develops long-term relationships with patients, focusing on comprehensive wellness plans that address both physical and mental health aspects.
Questions
What age patients do you treat?
We specialize in adult healthcare for patients aged 14 and older, providing comprehensive primary care and internal medicine services.
Do you offer same-day appointments?
Yes, we provide same-day and next-day urgent care appointments at all our New Hampshire locations for immediate medical needs.
What chronic conditions do you manage?
Our team specializes in managing chronic conditions including diabetes, COPD, congestive heart failure, arthritis, and cardiovascular diseases.
Are telehealth visits available?
Yes, we offer secure telehealth appointments for convenient access to medical consultations from your home or office.
What diagnostic services are on-site?
We provide on-site lab testing, 3D digital mammography, bone density testing, and other diagnostic imaging services at our facilities.
Can I choose any insurance plan?
We accept most major insurance plans with typically $5 copays, and our staff will verify your coverage details during scheduling.