Colonoscopy clinicians in Scottsdale, Arizona

CMS lists 87 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 Scottsdale, Arizona (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Stuart Triester, MD	478	99%
Anuj Vyas, DO	431	99%
Erika Boroff, MD	319	96%
Suzanne Skoog, MD	296	96%
Bradford Jones, MD	294	96%
Gavin Levinthal, MD	289	95%
Siva Talluri, MD	257	94%
Layth Al-Jashaami, MD	240	93%
Amar Thosani, MD	219	91%
Adam Harris, MD	217	91%
Rucha Shah, MD	215	90%
Daniel Meline, MD	200	89%
Emma Castillo, MD	195	88%
Michele Lewis, MD	184	87%
Alexander Lee, MD	182	86%
Malvinderjit Singh, MD	179	86%
Jagdish Patel, MD	178	86%
Alhareth Al Juboori, MD	174	85%
Anil Seetharam, MD	166	84%
Deepa Shah, MD	164	83%
Suryakanth Gurudu, MD	161	82%
Douglas Schwartz, MD	157	82%
Shaji Kazi, MD	153	81%
Akshay Shah, MD	153	81%
Akash Nabh, MD	152	80%
Christina Ha, MD	145	79%
Nayan Patel, DO	142	78%
Terry Jue, MD	139	77%
Talha Malik, MD	135	76%
David Tessler, DO	126	73%
Jyotsna Ravi, MD	123	72%
Shashank Garg, MD	122	72%
Janet Reiser, MD	120	71%
Sara Ancello, DO	118	71%
Jose Machain Palacio, MD	116	70%
Natalee Campbell, MD	115	70%
Cuong Nguyen, MD	114	69%
Prabhakar Swaroop, MD	111	68%
Rosita Frazier, MD	106	66%
David Leff, DO	103	65%
Jay Mellen, MD	99	64%
Carlos Zapata Antigoni, MD	99	64%
Yilien Alonso, MD	95	62%
Abdul Nadir, MD	94	62%
Andree Koop, MD	93	61%
Manreet Kaur, MD	92	61%
Wissam Mattar, MD	88	59%
Marion Harrison, MD	82	56%
Shabana Pasha, MD	82	56%
Tisha Lunsford, MD	78	54%
Sirish Rao, MD	77	53%
Matthew Jackson, DO	74	52%
Mashal Batheja, MD	72	51%
Vijay Singh, MD	70	50%
Marcelo Vela Aquino, MD	70	50%
Neena Abraham, MD	69	49%
Lucinda Harris, MD	63	46%
William Hasler, MD	63	46%
Douglas Faigel, MD	62	45%
Norio Fukami, MD	62	45%
Jennifer Horsley Silva, MD	56	42%
Guilherme Piovezani Ramos, MD	53	40%
Michelle Anderson, MD	49	38%
Francisco Ramirez, MD	49	38%
John Dibaise, MD	44	34%
Allon Kahn, MD	44	34%
Prasad Iyer, MD	43	34%
Niloy Samadder, MD	41	32%
Anna Silverman, MD	37	30%
Sarah Umar, MD	36	29%
Siddharth Singh, MD	35	28%
Kevin Ruff, MD	34	28%
Shiv Verma, MD	33	27%
Channa Jayasekera, MD	31	26%
Rahul Pannala, MD	29	25%
Elizabeth Carey, MD	25	22%
Rolland Dickson, MD	25	22%
David Chascsa, MD	22	20%
Michele Barnhill, MD	20	19%
Kenneth Diamond, MD	20	19%
Blanca Lizaola- Mayo, MD	20	19%
David Douglas, MD	19	18%
William Faubion, MD	19	18%
Bashar Aqel, MD	17	17%
Nooman Gilani, MD	1-10	13% or below
Jonathan Leighton, MD	1-10	13% or below
Evan Wilder, 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.

Hugo Vargas, 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).