Colonoscopy clinicians in Sacramento, California

CMS lists 105 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 Sacramento, California (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Gaspar Nazareno, MD	443	99%
Michael Mahoney, MD	409	98%
Aslam Godil, MD	351	97%
Jonathan Davidson, MD	337	97%
Kevin Hill, DO	306	96%
Dileep Atluri, MD	304	96%
Vida Chen, MD	291	96%
Chandra Veluru, MD	259	94%
Sandar Linn, MD	250	93%
Altaf Jan, MD	226	91%
Rana Khan, MD	222	91%
Amar Al Juburi, MD	219	91%
Saad Aziz	219	91%
Kathlynn Caguiat, PA	207	89%
Abdul Khaleq, MD	206	89%
Shilpa Lingala, MD	187	87%
Muhammad Shafqet, MD	184	86%
Gurpartap Sidhu, MD	180	86%
Navim Mobin, MD	177	85%
Rashid Iqbal, MD	175	85%
Inder Singh, MD	171	84%
David Pompa, MD	167	84%
Serag Dredar, MD	166	83%
De Tan, MD	165	83%
Frances Lee, DO	162	82%
Spencer Frost, MD	160	82%
Ian Logan, MD	155	81%
Roger Mendis, MD	155	81%
Asha Cogdill, MD	153	81%
William Chen, MD	138	77%
Jeffrey Ko, MD	135	76%
Michael Massaro, MD	123	72%
Juan Garcia, MD	120	71%
Anastasia Waechter, MD	120	71%
Rahul Dhillon, MD	118	70%
Lawrence Chan, MD	112	68%
Kimberly Wong, MD	112	68%
Souvik Sarkar, MD	105	66%
Sabba Maqbool, MD	101	64%
Kuldeep Tagore, MD	101	64%
Renee Debose, MD	98	63%
Hisham Hussan, MD	98	63%
Stephanie Mai, MD	96	62%
Johnathan Zhang, MD	93	61%
Danny Yen, MD	90	60%
Hansen Kwok, MD	88	59%
Jesse Stondell, MD	86	58%
Thimmaiah Theethira, MD	86	58%
Sarah Flores, MD	85	57%
Cecilia Terrado, MD	85	57%
Antonio Mendoza Ladd, MD	83	56%
Alex Zhornitskiy, MD	82	56%
Ashwani Kapoor, MD	75	52%
Michelle Lee, DO	72	51%
Laura Pestana, DO	72	51%
Sadha Tivakaran, MD	69	49%
Lien Le, MD	68	49%
Ramin Bagheri, MD	66	48%
Eric Chak, MD	60	45%
Manan Jhaveri, MD	60	45%
Rekha Cheruvattath, MD	59	44%
Patrick McCabe, MD	57	43%
Shiro Urayama, MD	52	40%
Vadim Bul, MD	51	39%
Eric Mao, MD	49	38%
Andrew Gilman, MD	47	37%
Albert Do, MD	31	27%
Maneesh Dave, MD	28	25%
Michael Lawson, MD	22	21%
Ali Akram, MD	21	20%
Alexander Kuo, MD	20	19%
Lydia Aye, DO	19	19%
Cara Torruellas	19	19%
Christopher Bowlus, MD	17	17%
Neil Nedley, MD	13	15%
Jonathan Lin, MD	12	14%
Maria Aguilar, MD	1-10	13% or below
Ali Azarm, MD	1-10	13% or below
Mitchell Bunnell, DO	1-10	13% or below
Albert Chang, MD	1-10	13% or below
Andrew Chao, MD	1-10	13% or below
Matthew Cole, MD	1-10	13% or below
Gian Marco Galura, MD	1-10	13% or below
Masoud Ghaemmaghami, MD	1-10	13% or below
Jason Guardino, DO	1-10	13% or below
Chhaya Hasyagar, MD	1-10	13% or below
Salwa Hussain, MD	1-10	13% or below
Prashant Jadav, DO	1-10	13% or below
Sheeva Johnson, MD	1-10	13% or below
Linda Lee, MD	1-10	13% or below
Robert Levy, MD	1-10	13% or below
Palaniappan Manickam, MD	1-10	13% or below
Rupinder Mann, MD	1-10	13% or below
Joseph Marsano, MD	1-10	13% or below
Raphael Merriman, MD	1-10	13% or below
Koorosh Moezardalan, MD	1-10	13% or below
Ashwini Mulgaonkar, MD	1-10	13% or below
Bao Chau Nguyen, MD	1-10	13% or below
Cindy Piao, MD	1-10	13% or below
Amir Taefi, MD	1-10	13% or below
Loc Ton, MD	1-10	13% or below
Shashank Vemala, MD	1-10	13% or below
Timothy Wang, MD	1-10	13% or below
Diana Ying Wu, MD	1-10	13% or below
Debra Yen, 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).