Colonoscopy clinicians in San Antonio, Texas

CMS lists 73 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 San Antonio, Texas (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Russell Havranek, MD	267	95%
Ernesto Guerra, MD	230	92%
Gary Gossen, MD	225	91%
Joseph Johnson, MD	222	91%
David Jones, DO	214	90%
Richard Otero, MD	199	89%
Jeff Bullock, MD	198	88%
Charles Randall	188	87%
Antonio Serna, MD	181	86%
Kevin Franklin, MD	167	84%
Emuejevoke Okoh, MD	144	78%
James Alvarez, MD	141	78%
Marco Bustamante Bernal, MD	140	77%
Eddie Flores, MD	123	72%
Donna McMyler, MD	119	71%
Harsh Patel, MD	119	71%
Joycelyn Theard, MD	107	67%
Roberto Ponce, MD	104	66%
Bijo John, MD	103	65%
Alfredo Chavez, MD	98	63%
Gregg Wendorf, MD	97	63%
Elissa Lin, MD	96	63%
Jadesola Omoyeni, MD	96	63%
Desh Sharma, MD	96	63%
Abhishek Challa, MD	94	62%
John Vizuete, MD	92	61%
Nicholas Martinez, MD	89	59%
Balaji Ayyar, MD	88	59%
Bassem Mazloum, MD	88	59%
John Alvarez, MD	87	59%
Mark Cossentino, MD	82	56%
Victor Zurita, MD	82	56%
Laura Rosenkranz, MD	77	53%
Amit Goyal, MD	73	51%
Chaithanya Mallikarjun, MD	71	50%
Jason Rocha, MD	69	49%
Babusai Rapaka, MD	67	48%
Rajat Garg, MD	54	41%
Meher Sindhoora Mavuram, MD	53	40%
Charles Miller, MD	49	38%
Mohammad Taheri, MD	48	37%
Randy Wright, MD	47	36%
Orestes Moldes-Rodriguez, MD	46	36%
Obinna Ukabam, MD	40	32%
Ruben Ramirez, MD	39	31%
Alexis Pavle, MD	37	30%
Seema Dar, MD	36	29%
Juan Echavarria, MD	33	27%
Souleymane Diallo, DO	30	25%
Allison Sirakos, MD	28	24%
Pradeep Yarra, MD	23	21%
Paul Kaimakliotis, MD	22	20%
Mahesh Gajendran, MD	21	20%
Prabhleen Chahal, MD	19	18%
Sandeep Patel, MD	18	18%
Karolina Dziadkowiec, MD	15	16%
Cari Sorrell, MD	14	15%
Sarah Marucci, MD	13	14%
Hari Sayana, MD	12	14%
Hopethe Baker, MD	1-10	13% or below
Brenda Briones, MD	1-10	13% or below
John Dickson, MD	1-10	13% or below
Leo Edwards, MD	1-10	13% or below
Angel Gonzalez, MD	1-10	13% or below
Omer Junaidi, MD	1-10	13% or below
Farah Ladak, MD	1-10	13% or below
Gabriel Magraner, MD	1-10	13% or below
Albert Manudhane, MD	1-10	13% or below
Fernando Membreno, MD	1-10	13% or below
Madhavi Rudraraju, MD	1-10	13% or below
Kamran Safdar, MD	1-10	13% or below
Patrick Snyder, MD	1-10	13% or below
Kavitha Thudi, 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.

Eugenia Tsai, 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).