Medical Staff
Browse this page to learn more about our Northfield medical staff, or click on one of the links immediately below to jump to physicians practicing in a particular specialty. Click on the names or photos to learn more about each provider.
Audiology | Ear, Nose & Throat | Family Medicine | General Surgery | Internal Medicine
Neurology | Obstetrics/Gynecology | Pediatrics | Urology | Mayo Clinic Outreach Services
Family Medicine
Internal Medicine

Katherine Helgen, MD- Education:
- College: St. Olaf College
- Medical School: St. Louis University School of Medicine
- Residency: Mayo Clinic in Rochester, Minn. for Internal Medicine
- Professional Designations:
- Board certified by the American Board of Internal Medicine
- Special Interests:
- Travel medicine
- Geriatrics
- Hypertension
- Education:

Randolph Reister, MD- Education:
- College: Augustana College
- Medical School: University of South Dakota School of Medicine
- Residency in Internal Medicine at Creighton University (ChiefMedical Resident)
- Professional Designations:
- Fellow of the American College of Physicians
- Board Certified in Internal Medicine
- Special Interests:
- Skilled endoscopist who preforms both colonoscopies and EGDs
- Management of Diabetes
- Hypertension
- Heart Failure
- Kidney Disease
- Disorders of the GI Tract
- Personal Interests:
- Avid Runner
- Baseball and Football Fan
- Education:
Obstetrics and Gynecology
(services are provided at Women’s Health Center in the same clinic building)


Melanie H. Dixon, MD- Education:
- College: Duke University
- Medical School: University of North Carolina School of Medicine
- Residency: Mayo Clinic Rochester MN
- Professional Designations:
- Fellow American Congress of Obstetricians and Gynecologists
- Special Interests:
- Routine and high risk obstetrics
- Minimally invasive gynecologic surgery
- Education:


Deborah Suppes, MD- Education:
- College: Cornell College of Mt. Vernon IA
- Medical School: Mayo Medical School of Rochester MN
- Residency: University of MN Integrated Residency in Obstetrics, Gynecology and Women’s Health
- Professional Designations:
- Board-Certified by the American Board of Obstetrics and Gynecology
- Chair, Surgery Department, Northfield Hospital 2011
- Chair of Perinatology at Northfield Hospital 2006-2010
- Special Interests:
- General and High Risk Obstetrics
- Gynecologic Surgery including minimally invasive procedures
- General Gynecology
- Adolescent Gynecology
- Personal Interests:
- Married with three grown children
- Enjoys sewing, Renaissance Faires, figure skating and belly dancing
- Education:
Pediatrics

Todd Amunrud, DO- Education:
- College: University of Minnesota at Duluth
- Medical School: Des Moines University– Osteopathic Medical Center
- Residency: University of Nebraska Medical Center at Creighton University
- Professional Designations:
- Fellow American Academy of Pediatrics
- Special Interests:
- Newborn Care
- Prevention
- child Development
- Sports Medicine
- Personal Interests:
- Lives in Northfield with wife and 2 children
- Enjoys mountain bike racing, cross country skiing and spending time with family in Minnesota
- Education:

Ben Flannery, MD- Education:
- College: Saint John’s University
- Medical School: University of Iowa College of Medicine
- Residency: Iowa Methodist Medical Center/Blank Children’s Hospital Des Moines
- Professional Designations:
- Board Certified Pediatrician
- Fellow of the American Academy of Pediatrics
- Special Interests:
- Childhood procedures
- Newborn care
- Childhood vaccinations
- Personal Interests:
- Lives and works in Northfield
- Education:
Ear, Nose & Throat

Gerard O’Halloran, MD-
- Education:
- Medical School: Mayo Medical School, Rochester MN
- Residency: Mayo Clinic, Rochester, MN
- Subspecialty Board Certification in Sleep Medicine by ABO
- Professional Designations:
- American Rhinologic Society
- American Academy of Sleep Medicine
- American Academy of Otolaryngology – Head and Neck Surgery
- Course Director for Primary Care Nose and Sinus Course at international Rhinologic Society meeting Washington, D.C.
- "Sinus" Headache presentation at International Rhinologic Society, Rome
- Author of "The Nose and Sinuses for Primary Care Physicians"
- Anatomy consultant for model of nose and sinuses - winner of six first place medical illustration/marketing awards
- Special Interests:
- Nose and Sinus problems
- "Sinus" headaches, migraine headaches
- Adult and pediatric sleep related breathing problems
- Pediatric ear, nose and throat problems
- Personal Interests:
- Wife Melissa works as an OB-GYN in Burnsville and Edina
- Busy with son Bennett and dog Emmi
- Education:
-
General Surgery

Jose Fulco, MD, FACS- Education:
- Medical School: University of Health Sciences/The Chicago Medical School
- Residency: University of Minnesota
- Professional Designations:
- Certified by the American Board of Surgery
- American College of Surgeons - Fellow
- Special Interests:
- Medical Director of the Breast Care Center at Northfield Hospital
- Performs a full range of general and laparoscopic surgery procedures
- Physician services provided by Surgical Care Consultants, P.A.
- Education:

Christopher Nielsen, MD, FACS- Education:
- College: Iowa State University
- Medical School: University of Iowa College of Medicine
- Residency: General Surgery at Iowa Methodist Medical Center in Des Moines, Iowa
- Fellowship in surgical critical care at the University of Minnesota
- Professional Designations:
- American Board of Surgery – Certified in General Surgery and Critical Care
- American College of Surgeons – Fellow
- Special Interests:
- Trauma and Critical Care
- Laparoscopy and Endoscopy
- Endocrine - thyroid, parathyroid and adrenal concerns
- Breast - Benign and malignant diseases
- Gastrointestinal, Colorectal and Biliary disease
- Hernia, Skin and Soft Tissue Surgery
- Venous disease
- Physician services provided by Surgical Care Consultants, P.A.
- Education:
Neurology

Melinda Burnett, MD- Provides diagnosis and treatment of a wide variety of disorders of the nervous system
- Graduate of the University of California, San Francisco School of Medicine
- Internship in internal medicine and residency in neurology at Mayo Graduate School of Medicine in Rochester, Minn.
- Special interests include migraines and movement disorders
- Certified by the American Board of Psychiatry and Neurology; member of the American Academy of Neurology and the Movement Disorder Society
Audiology

Miriam Attias, AuD- Independent, board-certified audiologist
- Areas of interest include general audiology, hearing instrument dispensing, and Auditory Processing Disorder (ADP) assessment and intervention
- Received her medical training at the University of Minnesota and University of Florida and is a Fellow of the American Academy of Audiology
Urology
Surgeons from Urology Associates, Ltd., provide urology services.
Mayo Clinic Outreach Services
Visiting specialists from Mayo Clinic Outreach provide services in the areas of:
- Cardiology (adult and pediatric)
- Vascular medicine
- Nephrology
- Maternal-fetal medicine (high-risk pregnancy care)
- Medical oncology

