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Choosing a surgeon -- and a hospital for surgery -- can be a daunting task. For people in need of either complex or minor procedures, Roger Williams is home to a number of experienced fellowship-trained surgeons and an excellent team of anesthesiology, nursing, and support staff. 

Our Department of Surgery at Roger Williams offers a full range of special and subspecialty services and the latest surgical technologies are used. We are home to approximately 7,300 inpatient and outpatient surgical procedures annually. Our surgical programs have received accreditation and designation from organizations like Blue Cross & Blue Shield of Rhode Island, among others. Critical care nursing is provided in the Surgical Intensive Care Unit.

Surgical procedures performed include, but are not limited to, the following:


Bariatric Surgery

Colorectal Surgery

Ear, Nose and Throat Surgery

Gastro-intestinal Surgery

General Surgery

Genito-urinary Surgery

Gynecological Surgery

Laparoscopic Surgery

Liver surgery

Minimally Invasive Surgery

Neurological Surgery

Oncologic Surgery

Ophthalmic Surgery

Oral and Maxillofacial Surgery

Orthopedic Surgery

Pancreas surgery (Whipple procedure and distal pancreatectomy)

Podiatric Surgery

Reconstructive Surgery

Sarcoma surgery (including GIST or gastrointestinal stromal tumor)

Sentinel lymph node mapping for breast cancer and melanoma

Thoracic Surgery

Urologic Surgery

Vascular Surgery

Weight Loss Surgery


The Roger Williams Orthopedics Center offers a complete range of orthopedic surgery and recovery services. Our board-certified surgeons have made the Orthopedics Center a source of nationally recognized orthopedic care. We were the first program in Rhode Island to be designation as a Blue Cross Distinction center for spine surgery as well as hip and knee replacement. We  are the only program in Rhode Island to participate in the American Association of Orthopedic Surgeons “Own the Bone” program for excellence. 


Our services include:


  • Computer navigation for joint replacement surgery in the State.
  • Partial and total knee resurfacing/replacement.
  • Primary and revision hip, knee and shoulder replacement.
  • Dedicated orthopedic floor with certified orthopedic nurses.
  • Private rooms with flat screen TVs.
  • Subacute rehabilitation unit at Elmhurst.
  • Home care for post discharge home physical therapy.
  • Geriatric service for elder care

Our surgeons utilize leading edge technology such as the Stryker Surgical Navigation System to achieve precision that was only dreamed of until recently. Along with this kind of precision, experience and technology, patients can recover at the Roger Williams Orthopedics Center, a specialized patient floor where postoperative orthopedic care is supported by nursing staff and rehabilitation professionals who are renowned for individual attention and compassionate care.


To contact one of our orthopedic physicians, call the numbers below.


Gregory Austin, MD

Hand Surgery



Kenneth Catallozzi, MD

Orthopedic Surgery



Louis J. Mariorenzi, MD

Joint Replacement Surgery



Michael Mariorenzi, MD

Shoulder & Knee Reconstructive Surgery



Sidney Migliori, MD

Orthopedic Surgery &  Sports Medicine



Franklin Mirrer, MD

Shoulder & Knee Surgery, Sports Injuries



Kenneth Morrissey, MD

Orthopedic Surgery



Ira Singer, MD

Total Joint Replacement & Arthroscopic Surgery




Phone: 401-456-2650

Hours: Monday-Friday, 6:00 a.m. - 7:30 p.m.

Nursing coverage until 9:00 p.m. or until the last patient is either discharged to home or admitted.



The Ambulatory Surgery Unit provides surgical services (not requiring hospitalization) to patients aged 13 and older. Our staff is trained to provide physical, emotional, and psychosocial support, while monitoring patients for pain and their capacity to follow discharge instructions safely and effectively. A patient’s length of stay depends on the ability to meet standardized discharge criteria. Patients who require hospitalization following a surgical procedure will naturally have a longer length of stay.




Phone: 401-456-2125

Hours: Monday-Friday, 7:30 a.m. - 5:30 p.m.

Three OR suites are open until 7:30 p.m.

Two OR suites are open until 11:00 p.m.


The Roger Williams OR is designed and equipped to perform major and minor surgical procedures in all specialty areas with the exception of open-heart surgery. We are a major center for joint replacement surgery, laproscopic gastric bypasses, and complex surgical oncologic procedures requiring the latest surgical technologies.


RNs and surgical scrub technicians adhere to AORN standards for Perioperative care. Surgery "Express" Program for select cases. Care is supplemented by a number of professional and ancillary staff.



Anesthesiology is the administration of pain-killing drugs during surgery and other medical procedures. Anesthesiologists are highly trained and certified professionals who must understand each patient's particular tolerance to the various anesthetic drugs as well as the interactions with medications a patient may be taking.

In addition to administering anesthesia related to surgery and/or medical procedures, the anesthesiologists at Roger Williams Medical Center are noted for their expertise in the area of pain management for individuals suffering from chronic pain due to injury, illness, or disease.