Colonoscopy clinicians in Phoenix, Arizona

CMS lists 88 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 Phoenix, Arizona (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Joseph Fares, MD	335	97%
Mark Gulinson, MD	300	96%
Tushar Gohel, MD	248	93%
Hussein Al-Hamid, MD	246	93%
Layth Al-Jashaami, MD	240	93%
Mehul Patel, DO	233	92%
Amar Thosani, MD	219	91%
Bassel Al-Lahham, MD	204	89%
Shifat Ahmed, MD	201	89%
Alexander Lee, MD	182	86%
Neil Vyas, MD	173	85%
Savio Reddymasu, MD	163	83%
Ronald Hauptman, MD	160	82%
Christina Ha, MD	145	79%
David Drewitz, MD	142	78%
Terry Jue, MD	139	77%
Sarabdeep Mann, MD	134	76%
Michael Foley, DO	132	75%
Michael Mills, MD	130	75%
Shashank Garg, MD	122	72%
Joseph David, MD	115	70%
Eugene Tharalson, MD	111	68%
Robert Walker, MD	109	67%
Rosita Frazier, MD	106	66%
Shreya Amin, MD	103	65%
Subhash Chandra, MD	101	65%
Adam Randolph, MD	101	65%
Jay Mellen, MD	99	64%
Adarsh Sai, MD	96	63%
Wael Youssef, MD	94	62%
Shiva Ratuapli, MD	88	59%
Navjot Singh, MD	84	57%
Florin Gaidici, MD	82	56%
Shabana Pasha, MD	82	56%
Mary Ann Atia, MD	79	54%
Kandarp Patel, DO	79	54%
Shahab Aftahi, MD	73	51%
Mashal Batheja, MD	72	51%
Aida Rezaie, MD	70	50%
Vijay Singh, MD	70	50%
Marcelo Vela Aquino, MD	70	50%
Lucinda Harris, MD	63	46%
William Hasler, MD	63	46%
Mustafa Alani, MD	55	41%
Radhika Babaria, MD	53	40%
Dalbir Sandhu, MD	52	40%
Michelle Anderson, MD	49	38%
Francisco Ramirez, MD	49	38%
Rushda Mumtaz, MD	46	36%
Jen Jung Pan, MD	42	33%
Kevin Liu, MD	41	32%
Sakolwan Suchartlikitwong, MD	40	32%
Hadiatou Barry, MD	39	31%
Mustafa Nawaz, DO	38	30%
Alberto Ramos, MD	38	30%
Elizabeth Cruz, MD	36	29%
Emmanuel Gorospe, MD	36	29%
Neil Sharma, MD	34	28%
Lynna Alnimer, MD	32	27%
Bradford Gelzayd, MD	30	25%
Rahul Pannala, MD	29	25%
Nisha Sharma, MD	29	25%
Krishdeep Chadha, MD	27	23%
Rizwan Jafri, DO	26	23%
Elizabeth Carey, MD	25	22%
Indu Srinivasan, MD	21	20%
Nadim Zyadeh, MD	21	20%
Vincent Honan, MD	20	19%
Blanca Lizaola- Mayo, MD	20	19%
David Douglas, MD	19	18%
Hector Rodriguez-Luna, MD	19	18%
Patrick Lam, DO	17	17%
Rohit Nathan, DO	16	16%
Wahid Wassef, MD	16	16%
Danlu Wang, DO	13	14%
Aws Alameri, MD	12	14%
Amy Soloman, DO	12	14%
Ericka Charley, MD	11	13%
Michael Fallon, MD	11	13%
Mohanad Al-Qaisi, MD	1-10	13% or below
Tyler Cobbs, DO	1-10	13% or below
Haripriya Maddur, MD	1-10	13% or below
Nilofar Najafian, MD	1-10	13% or below
Moises Nevah Rubin, MD	1-10	13% or below
Divyesh Sejpal, MD	1-10	13% or below
Mimi Van, DO	1-10	13% or below
Karn Wijarnpreecha, MD	1-10	13% or below
Joseph Woolley, DO	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).