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91 Montvale Avenue, Suite 206 Stoneham, MA 02180(781) 518-9050
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Clinicians & Administrators

Meet our Clinicians


Digestive Health Associates, PC & DHA Endoscopy Physicians


Fehmida A. Chipty, MD

Fehmida A. Chipty, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 404-4178
Fax: (781) 438-3751

Dr. Chipty received her BA in Biochemistry and Political Science at Wellesley College and her MD at the University of Massachusetts Medical School. She completed her residency and fellowship at the Albert Einstein Medical Center, Montefiore, and Hospital. Dr. Chipty is board certified in Gastroenterology. She joined Digestive Health Associates in 1998 and her general GI practice interests include colorectal cancer screening, reflux disease, chronic constipation and Inflammatory Bowel Disease.

Make an appointment with Dr. Chipty here

 



David S. Fefferman, MD

David S. Fefferman, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 665-3380
Fax: (781) 665-8288

Dr. Fefferman graduated with honors and received his MD from Jefferson Medical College in Philadelphia and then went on to complete his Internal Medicine training at Brown University School of Medicine's Rhode Island and Miriam Hospital. Dr. Fefferman subsequently completed his Gastroenterology and Advanced Endoscopy training at Harvard Medical School's Beth Israel Deaconess Medical Center. Dr. Fefferman has assisted in teaching Gastroenterology at Harvard Medical School and is a Clinical Instructor in Medicine. He has authored multiple articles and chapters for medical journals and textbooks. Dr. Fefferman joined Digestive Health Associates in 2005 and is board certified in Gastroenterology. Dr. Fefferman's clinical interests include colon cancer screening and prevention, Inflammatory Bowel Disease, Irritable Bowel Syndrome, esophageal disorders, as well as treating diseases of the liver and pancreas. He has additional training in therapeutic endoscopic procedures including ERCP.

Make an appointment with Dr. Fefferman here

 



Sanjay R. Hegde, MD

Sanjay R. Hegde, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 391-8015
Fax: (781) 835-2192

Dr. Hegde received his MD from Tufts University School of Medicine. His post-graduate training includes internship and residency training in Internal Medicine at Tufts Medical Center and Gastroenterology Fellowship Training at the University of Pennsylvania. His Advanced Endoscopy Fellowship was at Fox Chase Cancer Center in Philadelphia, PA. He has been on the faculty of the Gastroenterology Division at the University of Maryland Medical Center and in the Gastroenterology Division at Tufts Medical Center where he served as EndoscopyUnit Director. His areas of clinical interest and expertise are Advanced Therapeutic Endoscopy including Endoscopic Ultrasound (EUS), Endoscopic Retrograde Cholangiopancreatography (ERCP), removal of large colonic polyps, Argon Plasma Coagulation Therapy and General Gastroenterology. Dr. Hegde joined Digestive Health Associates and DHA Endoscopy in September 2016.

Make an appointment with Dr. Hedge here

 



Eric Libby, MD

Eric Libby, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781)-729-5855
Fax: (781)-721-5891

Dr. Libby received his BA in genetics from the University of California, Berkeley, and his MD from Harvard Medical School. His post-graduate training includes internship, residency and chief residency in Internal Medicine at the University of California, San Francisco, and fellowship in Gastroenterology at Duke University Medical Center. He is currently board certified in Gastroenterology. After working as Assistant Professor of Medicine and Associate Director of Endoscopy at Tufts University Medical Center, he joined the staff at Digestive Health Associates, Winchester Hospital and Hallmark Health. He has served on the board of the New England Endoscopy Society and is past Medical Director for the Winchester Ambulatory Care Unit and the Winchester Hospital Endoscopy Center.  Dr. Libby is a member of the American College of Gastroenterology and the American Society for Gastrointestinal Endoscopy.

Make an appointment with Dr. Libby here

 



Xi Na, MD, PhD

Xi Na, MD, PhD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 729-5822
Fax: (781) 438-5802

Dr. Na is board certified in Internal Medicine and Gastroenterology. Dr. Na received her medical degree with top honors from Peking University Health Science Center, the most selected and respected medical school in China. She subsequently came to the U.S. and earned her Ph.D. degree in pathology from the University of Rochester School of Medicine and Dentistry. She went on to complete her medical internship and residency and serve as chief medical resident in Internal Medicine at the Mount Sinai School of Medicine in New York. Dr. Na then attended Harvard Medical School's Beth Israel Deaconess Medical Center, where she received her specialty degree in Gastroenterology. Dr. Na has published multiple articles in top medical journals; presented numerous papers, and received prestigious awards at national and international conferences. Dr. Na provides highly personal and excellent care for her patients' digestive health and well-being. Dr. Na manages a wide range of gastroenterology conditions, including colon cancer screening, Crohn's Disease and Ulcerative Colitis, Irritable Bowel Syndrome and diseases of the esophagus, stomach, liver, and pancreas.

Make an appointment with Dr. Na here

 



R.A. Muggia, MD

R.A. Muggia, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 391-5525
Fax: (781) 438-3715

Dr. Muggia grew up in the Winchester area, attended school locally and started his practice in 1990. His father started his local GI practice in 1965 and they worked together for 15 years. He is the Chief of Gastroenterology at the Winchester Endoscopy Center , a Specialist Medical Director for the Highland Healthcare Associates IPA and the President of Digestive Health Associates and DHA Endoscopy. He received his MD from Tufts Medical School, completed three years of Internal Medicine residency at Duke University in North Carolina, three years of Fellowship at Harvard University's Beth Israel Deaconess Medical Center and an advanced interventional year at Maine Medical Center. Dr. Muggia sees patients with any GI concerns or needs. Digestive Health Associates can handle most all GI issues and we have colleagues at all the local tertiary centers. 
Article - Doctor Deals a Life Saving Hand

Make an appointment with Dr. Muggia here

 



Jose Marcal, MD

Jose Marcal, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 665-3380
Fax: (781) 665-8288

Dr. Marcal received his BA from Hamilton College, and his MD from Columbia University, NYC. His Internal Medicine training included Internship, Residency, and Chief Residency at Columbia-Presbyterian Hospital, NYC. He then completed a Gastroenterology Fellowship at Yale-New Haven Hospital, CT. He is board certified in Gastroenterology and in Internal Medicine. Dr. Marcal started his private practice in Gastroenterology and Hepatology in Stoneham in 1982. He served as Chief of Gastroenterology at New England Memorial Hospital in Stoneham from 1985-1990, and as Chairman of the Department of Internal Medicine from 1990-1995.  He joined Digestive Health Associates in 2000, and still holds a teaching position at Boston University School of Medicine, with medical students rotating into his practice all year.  He was named "Best in Boston" by Boston Magazine for Internal Medicine (1999) and for Gastroenterology (2000, 2001, 2011-2015, 2017). Dr Marcal also speaks Cantonese, Portuguese, Spanish, and French. His hobbies include road cycling in good weather and skiing in the winter.

Make an appointment with Dr. Marcal here

 



 

DHA Endoscopy Physicians/Surgeons


David Siegenberg, MD

David Siegenberg, MD

Dr Siegenberg is originally from South Africa, where he went to medical school at the University of Witwatersrand in Johannesburg. He moved to Boston to further his studies and completed his Internal Medicine residency and Gastroenterology fellowship at Boston University Medical Center.

Dr Siegenberg has been in private practice on the north shore since 1995. He sees patients for gastroenterology consultations at his office in Reading, MA and performs upper and lower endoscopy at the DHA endoscopy center in Stoneham and at the Winchester Hospital. He has same day appointments available for urgent consultations.

 



Midlevel Clinical Staff


 

Linda Corey, NP

Linda Corey, NP

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 665-3380
Fax: (781) 665 8288

Ms. Corey received her Master of Science degree in Nursing/NP from Simmons College in 2001 and is a board-certified Adult Nurse Practitioner. She has been a Registered Nurse since 1981. Ms. Corey joined DHA in 2001. Her clinical work experience includes Boston Regional Medical Center and Winchester Endoscopy Center . Ms. Corey's primary focus is the treatment of Hepatitis C. Ms. Corey coordinates care for Hepatitis C patients from all of the Digestive Health Associates offices, as well as assisting with procedures performed at DHA Endoscopy.

Make an appointment with Linda here


Tianna Farren

Tianna Farren, PA

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 404-4177
Fax: (781) 218 1013

Tianna is originally from the North Shore, but did her schooling in Worcester, MA. She obtained her Bachelor of Science in Biochemistry at Worcester Polytechnic Institute before completing her Master's of Physician Assistant Studies at the Massachusetts College of Pharmacy and Health Sciences University. She has come here with a 4 year background in gastroenterology. She thoroughly enjoys the outpatient setting, where she can develop a bond with her patients. For Tianna, she finds great importance in a good patient-provider relationship and open communication. Her training is in all gastroenterology disorders including; irritable bowel syndrome (IBS), Inflammatory bowel disease (IBD), GERD, liver disease and colon cancer screening.

Make an appointment with Tianna here


Matthew Schlossberger

Matthew Schlossberger, MD

91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: 781-391-2224
Fax: (781) 729 2615

Hi, my name is Matthew Schlossberger and I am very excited to be joining Digestive Health Associates this September. After completing training at Lahey Hospital for my gastroenterology fellowship, I am delighted and honored to stay local and serve our community. My areas of interest include general gastroenterology and inflammatory bowel disease. I truly look forward to providing you with care in the near future!

Make an appointment with Matthew here


Meet Our Administrators


Administrative Staff

Jean Chaput Welch

Jean Chaput Welch

Executive Director
Digestive Health Associates
& DHA Endoscopy

 

Eleanor Piekos

Eleanor Piekos

Assistant to Executive Director
Digestive Health Associates

 

Robert Puglisi

Robert Puglisi

VP of Operations
Physicians Endoscopy
& DHA Endoscopy

 

Robert Puglisi

Julie Hill

Digestive Health Associates
91 Montvale Avenue
Suite 103
Stoneham, MA 02180
Ph: (781)835-2111
Fax: (781) 438-4829

Administrator/Director of Nursing

 
 

Nicholas Latta

Nicholas Latta

Digestive Health Associates
91 Montvale Avenue
Suite 206
Stoneham, MA 02180
Ph: (781) 518-9052
Fax: (781) 518-9051

Network Administrator

Learn More

  • Office Hours
  • Maps & Directions
  • Payment Information
  • New Patient Forms

Patient Education

Patient Education
  • Understanding Colon Cancer Screening
  • Make the Best Choice for Your Endoscopic Procedure
  • Understanding Upper Endoscopy
  • Understanding Endoscopic Ultrasonography
  • Understanding Colonoscopy
  • Understanding Flexible Sigmoidoscopy
  • Understanding Colon Polyps and Their Treatment
  • Understanding Esophageal Dilation
  • Understanding Capsule Endoscopy
  • Understanding Percutaneous Endoscopic Gastrostomy
  • Ensuring the Safety of Your Endoscopic Procedure
  • Understanding Diverticulosis
  • Understanding Esophageal Testing or Manometry
  • Understanding Minor Rectal Bleeding
  • ERCP
  • Understanding Bowel Preparation
  • Understanding Barrett's Esophagus
  • Understanding Gastroesophageal Reflux Disease

Locations

 

Endoscopy Centers

DHA Endoscopy
91 Montvale Avenue, Suite 103
Stoneham, MA 02180

Winchester Hospital Endoscopy Center
10P Commerce Way Woburn, MA 01801

Winchester Hospital 41 Highland Avenue
Winchester, MA 01890

Physicians Offices


91 Montvale Avenue, Suite 206 
Stoneham, Ma 02180 


MASK ON & CARRY ON

Digestive Health Associates, PC proudly joins all 331 of their physician colleagues in endorsing Mask On & Carry On, Highland Healthcare Associates IPA’s masking campaign.  Our ultimate goal is to stop the spread of COVID- 19 by teaming with you, our patients, in an effort to emphasize the importance of masking. 

Key Items to Remember:

Wearing a mask helps protect you from COVID- 19.

Wearing a mask helps protect those you love from COVID- 19.

Practice responsible & safe masking behaviors by:

  • Making sure your mask:
  • Covers your nose and mouth, while still allowing for breathing without restriction.
  • Is secured with ties or ear loops, fitting snugly but comfortably against the sides of your face
  • Includes multiple layers of fabric
  • Can be laundered & machine dried without damage or change to shape (applies only to reusable masks)

 

Did you know the way a mask works is by stopping the germs from entering your airways?  Those germs gather on the outside of your mask.  By touching your mask and forgetting to wash your hands, you can carry those germs around with you.  Always remember:

  • Handle your mask by the ear loops/ties only – Avoid touching the front of your mask
  • Wash or sanitize your hands immediately after handling your mask.
  • Change your mask after each use or as soon as it becomes wet/soiled – whichever occurs first!

Help us stop the spread of COVID- 19  Mask On & Carry On!


Map & directions

Colorectal Cancer Awareness

Katie Couric colonoscopy video

Please click on the image above to access our secure Patient Portal, Follow My Health.

Gastroenterologist - Stoneham, DHA Endoscopy, 91 Montvale Avenue, Suite 206, , Stoneham MA, 02180 (781) 518-9050

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