Colonoscopy clinicians in Round Rock, Texas

CMS lists 39 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 Round Rock, Texas (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Kenneth Ellis, MD	483	99%
Benjamin Havemann, MD	402	98%
John Ziebert, MD	331	97%
Chia Wen Hsu, MD	298	96%
John Tsai, MD	263	94%
Christopher Godell, MD	234	92%
Harish Gagneja, MD	228	92%
Adam Hafemeister, MD	228	92%
Chad Long, MD	208	90%
Sushil Duddempudi, MD	204	89%
Daniel Emmett, MD	193	88%
Vijayrama Poreddy, MD	176	85%
Sheila Reddy, MD	174	85%
Jonathan Ramirez, MD	169	84%
Fletcher Srygley, MD	166	84%
Shiv Desai, MD	157	82%
Karthik Garapati, MD	147	79%
Ahmed Shobassy, MD	142	78%
Chiranjeevi Gadiparthi, MD	134	76%
Erik Rahimi, MD	126	73%
Robert Klapheke, MD	125	73%
Mario De Los Santos, MD	111	68%
Robert Just, MD	111	68%
David Valadez, MD	108	67%
Nicole Ferrante, MD	104	66%
Bryce Bushe, MD	96	63%
Vijay Dalapathi, MD	96	63%
David Kim, MD	91	60%
Aline Ghaleb, MD	82	56%
Melvin Lau, MD	78	54%
Raja Edula, MD	76	53%
Imo Akpan, MD	75	52%
Fortune Unegbu, MD	73	51%
Crystal Bowden McKay, MD	64	46%
Sooraj Tejaswi, MD	63	46%
Weiwei Cao, MD	56	42%
Jennifer Vincent, DO	52	40%
Praveen Sampath, MD	28	24%
Raja Koteswar Dhanekula, MD	27	23%

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill.

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).