Colonoscopy clinicians in Staten Island, New York

CMS lists 41 clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice who have billed Medicare for at least one colonoscopy and practice in Staten Island, New York (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Daniel Megna, MD	336	97%
Igor Grosman, DO	289	95%
Sherif Farag, MD	288	95%
Lawrence Mancino, MD	275	95%
Sherif Andrawes, MD	234	92%
Alexander Brun, MD	225	91%
Oleg Katcher, MD	222	91%
Prateek Chapalamadugu, MD	221	91%
Konstantin Peysin	205	89%
Lawrence Langan, MD	188	87%
Yevgeniy Mikityanskiy, DO	175	85%
Constantine Yiachos, MD	161	82%
Liliane Deeb, MD	156	81%
Hassan Al Moussawi, MD	152	80%
Sunil Patel, MD	134	76%
Youssef El Douaihy, MD	131	75%
Nancy Chen, MD	119	71%
Jean Chalhoub, MD	106	66%
Wallen Chan, MD	97	63%
Konstantin Vaizman, MD	92	61%
Deepak Vadada, MD	86	58%
Pawel Szurnicki, MD	85	57%
Prasanna Wickremesinghe	83	56%
Magda Daoud, MD	80	55%
Alia Hasham, MD	76	53%
Vahe Shahnazarian	70	50%
Mary Cheung, MD	62	46%
Yousef Elfanagely, MD	60	45%
Joseph Aboujaoude, MD	54	41%
Danial Daneshvar, MD	54	41%
Keith Dahl, DO	50	39%
Kiranpreet Parmar, MD	41	33%
Anu Sampat, MD	41	33%
Daniel Yeoun, DO	28	25%
Inas Mikhail, MD	18	18%
Joseph Roberts, MD	15	16%
Bari Ceka, MD	1-10	13% or below
Joseph Hederman, MD	1-10	13% or below
Pretam Rampersaud, MD	1-10	13% or below
Lucinda Ripoll, MD	1-10	13% or below
Noreen Tan-Chu, MD	1-10	13% or below

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill. CMS suppresses counts between 1 and 10 to protect patient privacy and publishes the range instead.

Understanding CMS Data

CMS's "Colonoscopy" category combines specific billing codes for colonoscopy to calculate the number of times each clinician billed Medicare for a "Colonoscopy." These include screening colonoscopy, diagnostic colonoscopy, and colonoscopy with biopsy or polyp removal. CMS's list also includes flexible sigmoidoscopy and laparoscopic appendectomy, so a clinician's count may include those procedures. CMS counts one procedure per patient per day, so a colonoscopy that included both a biopsy and a polyp removal counts once. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of colonoscopies a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice (as reported to Medicare) are presented.

Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).