Colonoscopy clinicians in Flushing, New York

CMS lists 50 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 Flushing, New York (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Sing Chan, MD	779	99%
Alan Yao, MD	721	99%
Jianlin Xie, MD	692	99%
Xinyu Zhao, MD	427	99%
Joon Myung, MD	368	98%
He Qiu, MD	344	97%
Constantine Fisher, MD	291	96%
Jae Geun Hyun, MD	289	95%
Calvin Pan, MD	266	95%
Tong Jing, MD	250	94%
Shahzad Iqbal, MD	206	89%
Raymond Diaz, MD	194	88%
David Beyda, MD	169	84%
Hasan Ali, DO	147	79%
Ray Dong, MD	146	79%
Chang Ho Suk, MD	145	79%
Chien Chiang, MD	131	75%
Sang Kim, MD	128	74%
Michel Nussbaum, MD	95	62%
Chung Ha, MD	89	59%
Steven Finkelstein, MD	86	58%
Michael Zelenetz, MD	80	55%
Samuel Cho, MD	71	50%
Naeem Abbas, MD	56	42%
Che Nan Chuang, MD	48	37%
Seyed Ali Khalessi Hosseini, MD	48	37%
Dayna Panchal, DO	46	36%
Ellen Gutkin, DO	44	34%
Albert Pahk, MD	31	26%
Philip Chuang, MD	30	25%
Nan Sandar, MD	29	25%
Daniel Yeoun, DO	29	25%
Xianyang Yio, MD	27	23%
Omid Sanaei	22	20%
Yingheng Liu, MD	21	20%
Kaumudi Somnay, MD	13	14%
Harry He, MD	11	13%
Kunil Bae, MD	1-10	13% or below
Sandy Chan, MD	1-10	13% or below
Yun Cho, DO	1-10	13% or below
Yunhee Chung, MD	1-10	13% or below
Hangjun Jang, MD	1-10	13% or below
Byung Kang, MD	1-10	13% or below
John Lee, MD	1-10	13% or below
Junho Lee, MD	1-10	13% or below
Yu Sun, MD	1-10	13% or below
Linda Tang, MD	1-10	13% or below
Yuqing Zhang, MD	1-10	13% or below
Li Zheng, MD	1-10	13% or below
Justin Zhuo, 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 (October 2, 2026 release).