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
Kenneth Ellis, MD	483	99%
Pavan Saridena, MD	431	99%
Craig Lubin, MD	424	99%
Benjamin Havemann, MD	402	98%
Richard Sperling, MD	402	98%
Parastoo Jangouk, MD	401	98%
Robert Frachtman, MD	314	96%
Chia Wen Hsu, MD	298	96%
Binh Pham, MD	280	95%
John Tsai, MD	263	94%
Harry Thomas, MD	248	93%
Harish Gagneja, MD	228	92%
Adam Hafemeister, MD	228	92%
Chad Long, MD	208	90%
Sushil Duddempudi, MD	204	89%
Scott Becker, MD	198	88%
Daniel Emmett, MD	193	88%
Pradeep Kumar, MD	190	87%
Sheila Reddy, MD	174	85%
Fletcher Srygley, MD	166	84%
Shiv Desai, MD	157	82%
Angel Alcocer, MD	147	79%
Karthik Garapati, MD	147	79%
Chiranjeevi Gadiparthi, MD	134	76%
Anupama Duddempudi, MD	133	75%
Erik Rahimi, MD	126	73%
Robert Klapheke, MD	125	73%
Sanaa Arastu, MD	123	72%
Dan Cohen, MD	123	72%
Jianhua Tau, MD	123	72%
Rajesh Mehta, MD	117	70%
David Valadez, MD	108	67%
David Kim, MD	91	60%
Kristen Ankrom, MD	88	59%
Rajesh Shah, MD	84	57%
Melvin Lau, MD	78	54%
Judith Kwarteng Amaning, MD	77	53%
Imo Akpan, MD	75	52%
Masi Khaja, MD	71	50%
Crystal Bowden McKay, MD	64	46%
Sooraj Tejaswi, MD	63	46%
Eimile Dalton, MD	57	42%
Weiwei Cao, MD	56	42%
Kavitha Kumbum, MD	50	38%
Mahmoud Soubra, MD	46	36%
Sanjana Luther, MD	45	35%
Sridhar Reddy, MD	45	35%
Crystale Cruz, DO	43	34%
Praveen Sampath, MD	28	24%
Raja Koteswar Dhanekula, MD	27	23%
Mohammad Yousef, MD	25	22%
Yasir Al-Abboodi, MD	24	21%
Linda Feagins, MD	24	21%
Mahmoud Madi, MD	21	20%
James Wise, MD	18	18%
Ryan Goldstein, MD	16	16%
Mohammad Bashashati Saghezchi, MD	12	14%
Kristina Tzartzeva, MD	12	14%
Zhouwen Tang, MD	11	13%
Deepak Agrawal, 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.

Reported in previous releases

CMS does not report a colonoscopy volume for these clinicians in the October 2, 2026 release. Their pages show figures from earlier releases.

Paul Keinarth, MD Last reported August 18, 2026

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).