Dr. Robert Pavelock joined Digestive Disease Medicine in 1991. He obtained his Bachelor’s Degree in 1980 from the State University of New York at Stony Brook. He went on to the Nicholas Copernicus Academy of Medicine in Cracow, Poland, through the SUNY Stony Brook Medical Exchange program, where he earned his Medical Degree in 1984. He completed a clerkship at the V.A. Medical Center in Northport, NY, in 1985, an Internship in Internal Medicine, as well as a Residency in Internal Medicine at SUNY Stony Brook University Hospital. In 1991, he was Chief Fellow in Gastroenterology/Hepatology at SUNY Stonybrook University Hospital and the V.A. Medical Center in Northport, NY. He is currently licensed to practice in the State of New York and is board-certified in Gastroenterology by the American Board of Internal Medicine. Dr. Pavelock is an Associate of the American College Of Physicians, a Member of the American Medical Association, and a Member of the American Gastroenterological Association.

Multiple Gastrointestinal Tract Diverticula.

Dr. Sklar joined Digestive Disease Medicine in 1993 with a patient focus on gastroenterology.

He received his Bachelors degree in Psychobiology from Hamilton College in 1984 before pursuing his Medical Degree at New York University School of Medicine, graduating in 1988. Dr. Sklar completed his residency in Internal Medicine and his Fellowship, at New York University.

Dr. Sklar holds his license to practice in the State of New York and is Board Certified in both Internal Medicine and Gastroenterology by the American Board of Internal Medicine. He is a member of the American Medical Association, American Gastroenterology Association, Medical Society of New York, and the American College of Gastroenterology. He has completed numerous research activities and co- published several articles over a period of 9 years.

He is an active staff member at Faxton-St, Luke’s Healthcare and St. Elizabeth Medical Center. 


Gardner, E.P., Sklar, B.F.: Discrimination of the Direction of Motion on the Human Hand: A psychophysical study of stimulation parameters. Journal Neurophysiology, 1994, June; 71(6l:) 241-29

Weinshel, E.H.; Sklar, B.F., Raicht , R.F., Ma, T.Y. and Hollander, D.: Intestinal Permeability Is Not Increased in HIV Positive Patients. Gastroenterology, April 1994 , Vol. 106, No. 4, Pt. 2, A792 Abstract.

Goodman, s., Rubier, s., Br yk, H., Sklar, B.F. and Glasser,L.: Arm Exercise Testing with Myocardial Scintigraphy in Asymptomatic Patients with Peripheral vascular Disease. Chest , 1989, Apr; 95(4l): 740-6

Gardner, E., Sklar, B.F. : Factors Influencing Discrimination of Motion on Human Hand. soc. Neurosci Abst. , 1986 Vol. 12, Pt 2. 798

Gescheider , G., Sklar, B.F.: Vibrotactile Forward Masking: Psychophysical Evidence for a Triplex Theory of cutaneous Mechanoreception. J. Accust, Soc. Amer. , 87(2), Aug. 1985.

Research Activities:

Clinical Research – Intestinal Permeability Gastroenterology Department – New York V.A. Medical center, New York, New York (1992-1993)

Clinicopathologic Research – Malabsorption comparison of the clinical history with the histologic appearance of small bowel mucosa of adults with malabsorption. Department of Surgical Pathology, NYU-Tisch Hospital (1989-1991)

New York University Honors Program:
Clinical Research – Arm exercise Stress Testing Department of cardiology, Veterans Hospital of Manhattan (1986-1988)

Clinical Research – Mechanoreception
Dept. of Physiology and Biophysics, New York University (Results presented at society of Neuroscience convention, Washington, D.C.) (1985-1986)

New York university Honors Program:
Basic Research· Extracellular recording in somatosensory cortex in monkeys
Department of Physiology and Biophysics, New York University (1984-1985)

Clinical Research – Mechanoreception
Institute for Sensory Research – Syracuse, NY Department of Psychology, Hamilton College, Clinton , NY (1982-1984)

  • American Medical Association
  • American College of Physicians
  • American Gastroenterology Association
  • American College of Gastroenterolgy

Dr. Allen is Board Certified for Internal Medicine and Gastroenterology by the American Board of Internal Medicine who believes in the practitioner research model of care. He believes in incorporating the model where science and practice work together ensures the best outcomes for his patients. His clinical interests are Inflammatory Bowel Disease (Crohn’s Disease and Ulcerative) and Colon Cancer.

Dr. Allen is certified in Gastric Balloon (ORBERA non-surgical weight loss system), Small bowel capsule endoscopy, Esophageal manometry/24 hr Ph probe, and CHR O’Regan System painless hemorrhoidal banding. In addition, Dr. Allen is the Director of Endoscopy and Director of the Esophageal Manometry Laboratory at St Luke’s Hospital. He is also the Medical Director of the Mohawk Valley Endoscopy Center. He is licensed to practice in the State of North Carolina, Georgia, and New York. He has hospital privileges at Faxton-St. Luke’s Healthcare, St. Elizabeth Medical Center.

He is a member of the American Gastroenterology Association, The American Society for Gastrointestinal Endoscopy, American Medical Association, American College of Gastroenterology, National Medical Association and Crohn’s Foundation.

A past member of the Winston-Salem City Advisory Board for the Boy Scouts as well as an Executive Board Member of the YMCA of the USA and a member of its National Medical Advisory Committee.

Dr. Allen is a four year NCAA All American in Swimming, Olympic Trial Qualifier, and Captain of the Johns Hopkins University Varsity Swimming Team, North Carolina AAU Swimmer, State Champion, and Record Holder. In 2020, Dr. Allen was inducted into The Johns Hopkins Swimming Hall of Fame.

When Dr. Allen is not working in the field, he enjoys playing golf and swimming with his family.

Research Activities:

NIH Research Grant
Dr. Martin Luther King/Charles R. Drew Medical Center
“Phagocytosis of Autologous Lymphocytes and Cervical Preneoplastic and Neoplastic Cells”
Published, 1988, Natural Immunity and Cell Growth Regulation.

“Natural Killer Cell Activity and Tumor Development of Age-Related Variation to 3-methycholanthrene”
Published, 1988, Journal of Natural Killer Cell and Host Defense.

Current area of study, Natural killer Cell Activity as Early Serum Marker in Colon Cancer, Mamdooh Ghonoum, Ph.D., Primary Investigator. (1989)

Laboratory Assistant, Johns Hopkins University
Department of Environment Chemistry
“Purification, Preparation and Amino Acid Analysis of Pheomelanin.” (1982-1983)

In 2019 Mohawk Valley Endoscopy Center welcomed Dr. Mark Pinkhasov as part of their team. Dr. Pinkhasov attended St John’s University College of Pharmacy from 2000-2006 receiving his Doctor of Pharmacy Degree. Dr. Pinkhasov returned to school in 2007 attending Touro College of Osteopathic Medicine where he earned his Doctor of Osteopathic Medicine Degree in 2011. He was an Internal Medicine resident in the SUNY Downstate Medical Residency program and completed a Fellowship in Hepatology at Rutgers New Jersey Medical School as well as a Fellowship in Gastroenterology at Hackensack University Medical Center.

Dr. Pinkhasov is board certified by The American Board of Internal Medicine in both Internal Medicine and Gastroenterology. He holds a license in both the State of New York and the State of New Jersey.
He is a member of the American Board of Internal Medicine and the American Osteopathic Board of Internal Medicine.

Dr. Pinkhasov practiced in Hackensack, New Jersey prior to moving to New Hartford, NY, where he now lives with his wife and three children.

Dr. Eddie L. Copelin II is a decorated United States Marine Corps Veteran who served in Operation Iraqi Freedom prior to pursuing medicine. After his tour in Iraq, he completed his B.S. in Biology from the New York Institute of Technology in Old Westbury, New York. In 2014, he obtained his Medical Degree from the American University of Antigua School of Medicine and graduated Cum Laude while simultaneously obtaining his master’s degree in Healthcare Administration from Walden University in 2013.
Dr. Copelin completed his internal medicine residency at Roger Williams Medical Center (2015-2018) in Providence, Rhode Island. He will be completing his gastroenterology fellowship in June 2021 at NYU Langone Long Island Hospital in Mineola, New York. Dr. Copelin believes in the advancement of endoscopic technology to promote better patient-focused outcomes.
Dr. Copelin is licensed to practice in the State of New York and is board-certified in Internal Medicine and Gastroenterology by the American Board of Internal Medicine. He is a member of the American Gastroenterological Association, and New York Society for Gastrointestinal Endoscopy.
Dr. Copelin enjoys mentoring in personal development and leadership. His interests are family, investing, traveling and weightlifting. He is an active member of the Marine Corps League….and lives by the motto “Once A Marine, Always A Marine” … Semper Fidelis


Copelin E, Cholankeril R, Somasundar P, Cholankeril G. Portomesenteric venous thrombosis complicated by a haemorrhagic shock: a rare complication of laparoscopic gastrectomy. BMJ Case Rep. 2017;2017:bcr2016219167. Published 2017 May 29. doi:10.1136/bcr-2016-219167

Daid, S, Copelin, E., Malik, A. Acute Cholangitis Secondary to Surgical Clip Migration after Laparoscopic Cholecystectomy. American Journal of Gastroenterology. 2020, Jul; Pub Status: Accepted.

Copelin E, Widmer J. Management of severe acute pancreatitis in 2019. Transl Gastroenterol Hepatol 2020. doi: 10.21037/tgh-2019-ie-03


Copelin E, Cholankeril G, Liver Transplantation. In Ferri’s Clinical Advisor 2018, 2019. New York, NY. Published.

Antubes C, Copelin E, Hepatitis. Stat Pearls. https://www.ncbi.nlm.nih.gov/books/NBK470300/. Pub Med ID (29262121)

Mehta NY, Copelin II EL. Abdominal Abscess. [Updated 2020 Jun 23]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK519573/–


Gadiparthi C, Copelin E, Cholankeril G, Siddique O, Joseph-Talreja M, Khan MA, Nair  SP, Hu M, Cholankeril G, Ahmed, A. Impact of Share 35 on waitlist outcomes in candidates MELD > 40. Poster of Distinction at 2017 Digestive Disease Week in Chicago, IL. May 2017. Gastroenterology, Volume 152, Issue 5, S1056


Cholankeril R, Copelin E, Yoo ER, Siddique O, Gadiparthi C, Khan MA, Perumpail BJ, Perumpail RB, Hu M, Cholankeril G, Ahmed A. Malnourished HCC patients associated with Highest Inpatient Mortality among GI cancers. Poster of Distinction at 2017 Digestive Disease Week in Chicago, IL. May 2017. Gastroenterology, Volume 152, Issue 5, S294

Gadiparthi C, Cholankeril R, Copelin E, Siddique O, Yoo ER, Khan MA, Liu A, Somasundar P, Nair SP, Cholankeril G, Ahmed. Hepatocellular carcinoma is now the leading primary cancer among Baby Boomers. Gastroenterology, Volume 152, Issue 5, S1179.
Gadiparthi C, Cholankeril R, Copelin E, Joseph-Talreja M, Khan MA, Somasundar P, Nair SP, Cholankeril G, Ahmed A.  Racial/Ethnic Disparities in Early-Stage Hepatocellular Carcinoma Curative Treatment Rates within Asia Rand Hispanics in Lops Angeles. Gastroenterology, Volume 152, Issue 5, S1197

Yoo ER, Copelin E, Cholankeril R, Siddique O, Gadiparthi C, Liu A, Perumpail RB, Hu M, Cholankeril G, Ahmed A. Increasing Hepatocellular Carcinoma-Related Liver Transplantation among Baby Boomer Generation with HCV, ALD, and NASH. Gastroenterology, Volume 152, Issue 5, S1179

Gadiparthi C, Cholankeril R, Copelin E, Yoo ER, Khan MA, Hu M, Ahmed A, Howden CW, Cholankeril G, Somasundar P. Reoperation increases the inpatient mortality in pancreatic cancer patients. Gastroenterology, Volume 152, Issue 5, S1292
A. Goizueta, E. Copelin, J. Meharg. A Case of Hepatic Hydrothorax with a Persistent Lymphocytic Exudative Effusion that Developed after Laparoscopic Cholecystectomy and Liver Biopsy.C46. PLEURAL DISEASE: CASE REPORTS II. American Thoracic Society, 2017. A5649-A5649.

Dr. Natalie A. Pavelock returns to central New York as the newest member of the Digestive Disease Medicine team. Dr. Pavelock was raised in Clinton, New York and went on to earn her MD at the Poznan University of Medical Sciences, is Poznan, Poland. She then went on to complete her internal medicine residency at NYU-Langone in Brooklyn, New York and completed her fellowship in gastroenterology and hepatology at SUNY Upstate Medical University, in Syracuse New York. Dr. Pavelock served as chief fellow from 2017-2018.

Dr. Pavelock is certified in endoscopy, colonoscopy, small bowel capsule endoscopy, esophageal manometry/24-hour Ph Prone and the CHR O’Regan painless hemorrhoid banding system. Dr. Pavelock is additionally trained and certified in endoscopic retrograde cholangiopancreatography.

She is a member of the American Gastroenterology Association and the American Society for Gastrointestinal Endoscopy. Dr. Pavelock is board certified in internal medicine and gastroenterology and is licensed to practice in New York State.

In her spare time, Dr. Pavelock loves to explore national parks with her dogs Max and Fergus.

Her clinical interests include inflammatory bowel disease, advanced endoscopy and women’s health in gastroenterology.

Dr. Pavelock is fluent in Spanish and Polish.

Peer Reviewed Journal Articles and Case Reports

Pavelock, N et al “Effects of Obesity on the course of Inflammatory Bowel disease” Proceeding (Baylor University Medical Center) Vol 32-1, 14-17 Fen 2019. 
Nandi J., Levine R., Pavelock N., Baltodano J., Zinkievich M. “Cyclo-Oxygenase 1 Inhibition Increases Acid Secretion by Modulation H+, K+-ATPase Expression Activation in Rabbit Parietal Cells”. Clinical and Experimental Pharmacology and Physiology. 2009 Feb; 36(2): 127-134.

Masood U, Sharma A, Pavelock N, Manocha D. “Rare cause of gastric varices secondary to an isolated left gastric vein stenosis” Journal of Digestive Disorders and Diagnosis. Published online October 2016.

Masood U, Pavelock N, Sharma A, Lebel RR, Murthy U, Gupta A. “A Novel PTEN mutation associated with colonic ganglioneuromatous polyps” QJM 2017. Published online March 17.

Sharma, A., Sablani, N., Pavelock, N., Genzer, O., Garnes, P., & Fernaine, G. “Positive predictive values of positive D-Dimer levels in venous thromboembolic events diagnosed by CT Angiography, venous duplex and V/Q scan.” Journal of Investigative Medicine 2015 Oct; 63 (2): 578-579.