Gastroenterology Associates Practice Marks 25-Year Milestone

September 16, 2021

Hickory Daily Record – September 12, 2021 – Gastroenterology Associates of Hickory marks a major milestone celebrating 25 years in private practice serving western North Carolina as board-certified specialists in gastrointestinal and liver disease.


Founded in 1996 by Dr. Caroll Koscheski and Dr. John Meier, the practice began with only two doctors and three employees. Gastroenterology Associates now lists thirteen providers, including seven physicians plus six advanced practice providers. More than seventy-five full-time and part-time employees complete the staff.


In addition to Doctors Koscheski and Meier, gastroenterologists at the practice also include Doctors Simon Allport, Gaa Richardson, Susan Nikrooz, Kristen Mussari and Disha Shah.

Dr. Caroll Koscheski
Founding Physician

“Against national trends of doctors working for large health-care organizations, we have strived to remain independent, since that allows us to provide both quality and economical care in the best interests of our patients,” said Dr. Meier, president of the group.

“It is very gratifying to see how our practice has developed in 25 years with hard work by our physicians and employees,” added Dr. Koscheski. “We feel we have had a very positive impact on the Hickory medical community and on the lives of our patients.”


Staff dedication, outstanding service and commitment have been instrumental to the growth of the practice. “We feel very fortunate to have had the opportunity to develop a busy practice providing very high-quality GI care right here in Hickory, NC,” Doctors Koscheski and Meier said.


Although much has changed in health care over the last 25 years, the doctors’ philosophy remains the same. The specialty medical practice is committed to excellence in endoscopy, delivering quality care in a comfortable, compassionate, and safe environment. The entire group adheres to very strict performance standards and consistently performs among top groups both regionally and nationally.

"One of the biggest changes we’ve seen in 25 years is patient acceptance for colonoscopy,” explained Dr. Koscheski. “Patients are very proactive today. They understand that screening saves lives and can reduce the risk of colon cancer by 70-80%. Now that the age for screening has dropped to 45, patients call us and say let’s get the process started.”

Colon cancer has decreased more than 30% over a ten-year time span in our area. Much of this progress can be attributed to colonoscopy and increased screening efforts, according to Dr. Koscheski.


A major development in the growth of Gastroenterology Associates was the opening of the first in-office endoscopy center in the greater Hickory area in 2005. Most endoscopy procedures for the practice are performed on-site in the award-winning facility.

“Patients like the privacy of our office setting, and our caring staff creates a comfortable atmosphere for each and every patient,” said Dr. Meier. The practice has safely performed tens of thousands of examinations in the facility.


With continued growth came the need for additional office space. Today, the practice occupies two floors in the Medical Specialties Center.


“It has been exciting to see major advancements within the GI specialty. We offer a broad range of services not usually available in a community of this size,” said Dr. Koscheski. “We look forward to serving patients in Hickory and the Unifour area for many years to come.“

dr john meier

Dr. John Meier
Founding Physician

About Gastroenterology Associates, P.A.
Founded in 1996, Gastroenterology Associates, P.A. specializes in the prevention, diagnosis, and treatment of digestive and liver diseases. The practice provides advanced evaluation and treatment of diseases of the esophagus, stomach, small intestine, colon, pancreas, biliary system (gallbladder and bile ducts) and liver.


The practice includes seven board-certified physicians and six advanced practice providers. All physicians and advanced practice providers are affiliated with Catawba Valley Medical Center and Frye Regional Medical Center in Hickory. The gastroenterologists are GI specialists committed to delivering quality health care, expertise, and advanced techniques in endoscopy in a comfortable, compassionate environment.

gastro associates logo
gastro associates office

Gastroenterology Associates features a 3,500 square foot endoscopy center recognized for outstanding quality measures by the American Society for Gastrointestinal Endoscopy (ASGE). It is accredited by the Accreditation Association for Ambulatory Health Care, Inc (AAAHC), and licensed by Medicare and the State of North Carolina.


Gastroenterology Associates serves patients in a multi-county 50-mile region, including Greater Hickory and the Unifour area. The practice is in the Medical Specialties Center at 415 North Center Street, Suite 300 in Hickory, NC. To learn more, call 828-328-3300.

August 4, 2025
Gregory Diamonti, MD, FACG, joined Gastroenterology Associates of Catawba Valley on August 4, 2025. Dr. Diamonti is a board-certified gastroenterologist with 23 years of experience and a Fellow of the American College of Gastroenterology. Most recently, Dr. Diamonti practiced in the Boone area. Prior to that, he was a physician with Gastroenterology Associates in Hickory for 18 years. “It is a privilege to welcome Dr. Gregory Diamonti to Gastroenterology Associates of Catawba Valley,” said Mariane Carna, president of CVHS’ Catawba Valley Medical Group. “With nearly 30 years of experience in gastroenterology and a distinguished record of excellence in patient care, Dr. Diamonti brings invaluable expertise to our practice and the community we serve. His deep roots in the region, combined with his collaborative, patient-centered approach, reflect our mission to deliver exceptional, coordinated care. Working alongside our team of leading GI specialists, Dr. Diamonti will help strengthen our commitment to advancing treatment and innovation in digestive health for the benefit of our patients and their families.” “We are thrilled to welcome Dr. Diamonti back to our practice,” added Stacey Coffey, Chief Administrator – Gastroenterology Associates of Catawba Valley. “He was an integral part of our team of providers for many years. His return strengthens our ongoing commitment to providing exceptional care and improved patient access. This is a huge win for our practice and our community.” Dr. Diamonti received his undergraduate degree from Binghamton University in New York and his medical degree from the State University of New York Downstate Health Sciences University in Brooklyn. He completed his residency and fellowship at Emory University School of Medicine in Atlanta.  Dr. Diamonti holds memberships in the American College of Gastroenterology and the American Gastroenterological Association.
June 4, 2025
Catawba Valley Health System (CVHS) has announced the addition of Gastroenterology Associates, PA, of Hickory to its medical group. The name of the practice has been updated to Gastroenterology Associates of Catawba Valley Health System effective June 1. All services, staff and team of physicians will remain the same,
Dr. Patel
September 3, 2024
Dr. Patel joined Gastroenterology Associates on September 3, 2024. Dr. Patel earned his undergraduate degree in Health Systems Management from Loyola University in Chicago and his medical degree from the University of Pittsburgh School of Medicine. He completed his residency and fellowship training at Barnes-Jewish Hospital/Washington University in St. Louis.
best asc award
May 14, 2024
Gastroenterology Associates Endoscopy Center has been named one of the 12 Best Ambulatory Surgery Centers (ASCs) for colonoscopy and endoscopy in North Carolina by U.S. News & World Report, the global authority in hospital rankings and consumer advice.
Dr. Laderian
September 5, 2023
We are pleased to announce the addition of Behnam Laderian, MD, to our practice. Dr. Laderian joined Gastroenterology Associates on September 5, 2023.
dr. carroll
February 27, 2023
As published in the Hickory Daily Record The newest guidelines from the American Cancer Society recommend people at average risk of colorectal cancer start regular screening at age 45. Previous screening guidelines started at age 50. Studies show rates of colorectal cancer among people younger than 50 are on the rise, according to the American Cancer Society.
dr bradley zins
May 2, 2022
We are pleased to announce the addition of Bradley Zins, MD to our practice. Dr. Zins joined Gastroenterology Associates on May 2, 2022.
endoscopy unit
December 12, 2021
As published in the Hickory Daily Record Gastroenterology Associates endoscopy unit was recently recognized for outstanding quality measures by the American Society for Gastrointestinal Endoscopy (ASGE).
dr shah
August 2, 2021
We are pleased to announce the addition of Disha Shah, DO to our practice. Dr. Shah joined Gastroenterology Associates on August 2, 2021. She will provide care for patients in the endoscopy center and clinic at Gastroenterology Associates, and hospital patients with Catawba Valley Medical Center and Frye Regional Medical Center.
Dr. Mussari headshot
August 1, 2019
We are pleased to announce the addition of a new physician to our medical staff. Dr. Kristen Mussari joined Gastroenterology Associates on August 1, 2019. Dr. Mussari is a native of Pennsylvania where she completed her medical training. She earned her undergraduate degree from the University of Pittsburgh. She received her medical degree from Geisinger Commonwealth School of Medicine in Scranton.
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