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Emerson Health Surgery

We have a new name! Walden Surgical Associates is now Emerson Health Surgery. We are a comprehensive general surgery practice located on the Emerson Hospital campus in Concord, Massachusetts. Our skilled general surgeons — Atif Khan, MD, FACS; Elizaveta Ragulin Coyne, MD, FACS; Christopher Schlieve, MD; and Alexandra Columbus, MD, FACS — and our nurse practitioner Suzanne Roberts, MSN, FNP-BC, perform a variety of procedures, including abdominal and intestinal surgery, breast surgery and melanoma surgery.

We are committed to delivering high-quality surgical care. Our staff is here to help you throughout your surgery experience, which begins with communicating clearly as we make every effort to accommodate your schedule and help coordinate any necessary testing. Our surgeons are often called upon to see emergency patients within 24 hours, and are frequently able to do so.

131 Old Road to Nine Acre Corner
Medical Office Building
Suite 500
Concord, MA 01742 Get Directions
Patient Hours
Monday – Friday, 8:30 a.m. – 5 p.m.

Meet Our Care Providers

Elizaveta Ragulin Coyne, MD, FACS
Cancer Services, General Surgery
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Suzanne Roberts, MSN, FNP-BC
General Surgery
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Alexandra Columbus, MD, MPH
General Surgery, Colorectal Surgery, Cancer Services
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Atif Khan, MD, FACS
Cancer Services, General Surgery
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Christopher Schlieve, MD, FACS
General Surgery, Cancer Services, Pediatric General Surgery
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Directions & Parking

Our office is located in the Medical Office Building of Emerson Hospital in Concord, Massachusetts. The campus entrance is located just off of route 2 on Old Road to Nine Acre Corner. As you enter from the street, bear left and follow signs toward the emergency entrance, then turn left into the parking lot that borders route 2, adjacent to the Medical Office Building. We validate for parking only in the main lot in front of the Medical Office Building. Parking in the garage will not be validated. Upon entering the building, turn right to find the elevators and proceed to the fifth floor and suite 500.



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Our Podcasts

Emerson's Health Works Here podcast series features our physicians and healthcare professionals discussing a wide range of topics, including these episodes with the Emerson Health Surgery team.

Breast Cancer Myth Busters

Dr. Ragulin Coyne discusses how to tell when lumps and breast pain are signs of cancer, as well as breast cancer surgery options.

Get to Know Dr. Alexandra Columbus, Colorectal Surgeon

Listen to Dr. Columbus explain how colorectal surgeons work with patients during a difficult diagnosis and hear her discuss the latest advances in colorectal surgery.

What is Pilonidal Disease? Learn From a Pediatric Surgeon

Dr. Schlieve discusses pilonidal disease and the latest treatments to reduce pain and occurrence of this challenging condition.

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