Colonoscopy clinicians in Phoenix, Arizona

CMS lists 84 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	334	97%
Mark Gulinson, MD	301	96%
Layth Al-Jashaami, MD	245	93%
Tushar Gohel, MD	245	93%
Hussein Al-Hamid, MD	239	93%
Amar Thosani, MD	227	91%
Mehul Patel, DO	217	90%
Shifat Ahmed, MD	185	86%
Bassel Al-Lahham, MD	179	86%
Ronald Hauptman, MD	179	86%
Alexander Lee, MD	178	85%
Savio Reddymasu, MD	165	83%
David Drewitz, MD	161	82%
Neil Vyas, MD	155	81%
Sarabdeep Mann, MD	147	79%
Michael Mills, MD	141	78%
Shreya Amin, MD	135	76%
Terry Jue, MD	130	74%
Christina Ha, MD	129	74%
Eugene Tharalson, MD	126	73%
Michael Foley, DO	124	73%
Shashank Garg, MD	116	70%
Joseph David, MD	115	69%
Adam Randolph, MD	114	69%
Subhash Chandra, MD	113	69%
Adarsh Sai, MD	111	68%
Shiva Ratuapli, MD	108	67%
Rosita Frazier, MD	95	62%
Robert Walker, MD	93	61%
Wael Youssef, MD	92	61%
Florin Gaidici, MD	90	60%
Shabana Pasha, MD	90	60%
Jay Mellen, MD	88	59%
Navjot Singh, MD	86	58%
Kandarp Patel, DO	77	54%
Marcelo Vela Aquino, MD	72	51%
Shahab Aftahi, MD	71	50%
Elizabeth Cruz, MD	71	50%
William Hasler, MD	69	49%
Vijay Singh, MD	69	49%
Aida Rezaie, MD	65	47%
Dalbir Sandhu, MD	64	47%
Mashal Batheja, MD	61	45%
Radhika Babaria, MD	60	45%
Lucinda Harris, MD	54	41%
Rushda Mumtaz, MD	52	40%
Michelle Anderson, MD	46	36%
Alberto Ramos, MD	46	36%
Mustafa Alani, MD	45	36%
Jen Jung Pan, MD	45	36%
Kevin Liu, MD	44	35%
Sakolwan Suchartlikitwong, MD	38	31%
Mustafa Nawaz, DO	35	29%
Kristen Farraj, DO	34	29%
Emmanuel Gorospe, MD	33	28%
Bradford Gelzayd, MD	32	27%
Nisha Sharma, MD	32	27%
Rahul Pannala, MD	31	27%
Francisco Ramirez, MD	31	27%
Nadim Zyadeh, MD	26	23%
Lynna Alnimer, MD	25	23%
Aws Alameri, MD	24	22%
Krishdeep Chadha, MD	24	22%
Rizwan Jafri, DO	24	22%
Elizabeth Carey, MD	23	22%
Indu Srinivasan, MD	23	22%
Hector Rodriguez-Luna, MD	22	21%
Danlu Wang, DO	22	21%
Vincent Honan, MD	21	20%
Wahid Wassef, MD	20	19%
Rohit Nathan, DO	19	19%
David Douglas, MD	17	17%
Blanca Lizaola- Mayo, MD	15	16%
Mimi Van, DO	15	16%
Michael Fallon, MD	12	14%
Moises Nevah Rubin, MD	11	13%
Mohanad Al-Qaisi, MD	1-10	13% or below
Patrick Lam, DO	1-10	13% or below
Haripriya Maddur, MD	1-10	13% or below
Nilofar Najafian, MD	1-10	13% or below
Divyesh Sejpal, MD	1-10	13% or below
Amy Soloman, DO	1-10	13% or below
Hugo Vargas, MD	1-10	13% or below
Karn Wijarnpreecha, 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.

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 (August 18, 2026 release).