Colonoscopy clinicians in Austin, Texas

CMS lists 61 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 Austin, Texas (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Benjamin Havemann, MD	452	99%
Pavan Saridena, MD	452	99%
Kenneth Ellis, MD	435	99%
Richard Sperling, MD	425	99%
Craig Lubin, MD	406	98%
Parastoo Jangouk, MD	394	98%
Chia Wen Hsu, MD	331	97%
Robert Frachtman, MD	320	96%
Binh Pham, MD	283	95%
Harry Thomas, MD	259	94%
Harish Gagneja, MD	250	93%
Adam Hafemeister, MD	249	93%
John Tsai, MD	242	93%
Scott Becker, MD	230	92%
Chad Long, MD	211	90%
Daniel Emmett, MD	205	89%
Fletcher Srygley, MD	180	86%
Pradeep Kumar, MD	177	85%
Sheila Reddy, MD	176	85%
Angel Alcocer, MD	143	78%
Shiv Desai, MD	138	77%
Sanaa Arastu, MD	137	76%
Anupama Duddempudi, MD	137	76%
Karthik Garapati, MD	135	76%
Chiranjeevi Gadiparthi, MD	132	75%
Robert Klapheke, MD	128	74%
David Valadez, MD	125	73%
Jianhua Tau, MD	120	71%
Rajesh Mehta, MD	116	70%
Erik Rahimi, MD	114	69%
Dan Cohen, MD	106	66%
David Kim, MD	101	64%
Judith Kwarteng Amaning, MD	95	62%
Rajesh Shah, MD	81	55%
Sooraj Tejaswi, MD	80	55%
Imo Akpan, MD	78	54%
Kristen Ankrom, MD	78	54%
Melvin Lau, MD	75	52%
Masi Khaja, MD	66	48%
Eimile Dalton, MD	65	47%
Kavitha Kumbum, MD	59	44%
Weiwei Cao, MD	54	41%
Crystal Bowden McKay, MD	52	40%
Sanjana Luther, MD	51	39%
Mahmoud Soubra, MD	48	38%
Yasir Al-Abboodi, MD	43	34%
Sridhar Reddy, MD	42	34%
Praveen Sampath, MD	33	28%
Crystale Cruz, DO	24	22%
Raja Koteswar Dhanekula, MD	23	22%
Linda Feagins, MD	22	21%
Mohammad Yousef, MD	21	20%
Kristina Tzartzeva, MD	20	19%
James Wise, MD	19	19%
Zhouwen Tang, MD	17	17%
Ryan Goldstein, MD	16	17%
Mahmoud Madi, MD	12	14%
Deepak Agrawal, MD	1-10	13% or below
Mohammad Bashashati Saghezchi, MD	1-10	13% or below
Paul Keinarth, MD	1-10	13% or below
Hirsh Trivedi, 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).