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Colonoscopy clinicians in Sacramento, California

CMS lists 106 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
Piyush Dhanuka, MD 410 98%
Michael Mahoney, MD 393 98%
Gaspar Nazareno, MD 384 98%
Jonathan Davidson, MD 342 97%
Kevin Hill, DO 329 97%
Dileep Atluri, MD 296 96%
Vida Chen, MD 294 96%
Chandra Veluru, MD 270 95%
Navim Mobin, MD 250 94%
Kathlynn Caguiat, PA 234 92%
Sital Singh, MD 233 92%
Altaf Jan, MD 230 92%
Sandar Linn, MD 220 91%
Rana Khan, MD 212 90%
Amar Al Juburi, MD 207 90%
Gurpartap Sidhu, MD 206 89%
Shilpa Lingala, MD 194 88%
Inder Singh, MD 190 87%
Saad Aziz 186 87%
Abdul Khaleq, MD 172 85%
Spencer Frost, MD 169 84%
Muhammad Shafqet, MD 166 84%
Asha Cogdill, MD 162 83%
Serag Dredar, MD 162 83%
David Pompa, MD 161 82%
Roger Mendis, MD 152 80%
De Tan, MD 149 80%
William Chen, MD 140 77%
Kuldeep Tagore, MD 135 76%
Michael Massaro, MD 131 75%
Rashid Iqbal, MD 130 75%
Jeffrey Ko, MD 129 74%
Lawrence Chan, MD 123 72%
Anastasia Waechter, MD 123 72%
Ian Logan, MD 118 71%
Kimberly Wong, MD 117 70%
Juan Garcia, MD 114 69%
Antonio Mendoza Ladd, MD 113 69%
Rahul Dhillon, MD 110 68%
Sabba Maqbool, MD 108 67%
Renee Debose, MD 98 63%
Jesse Stondell, MD 94 62%
Manan Jhaveri, MD 92 61%
Cecilia Terrado, MD 91 60%
Hansen Kwok, MD 90 60%
Hisham Hussan, MD 85 58%
Thimmaiah Theethira, MD 85 58%
Ramin Bagheri, MD 82 56%
Johnathan Zhang, MD 82 56%
Andrew Gilman, MD 80 55%
Danny Yen, MD 80 55%
Michelle Lee, DO 76 53%
Stephanie Mai, MD 76 53%
Sadha Tivakaran, MD 76 53%
Sarah Flores, MD 74 52%
Alex Zhornitskiy, MD 72 51%
Lien Le, MD 67 48%
Vadim Bul, MD 62 45%
Rekha Cheruvattath, MD 62 45%
Patrick McCabe, MD 61 45%
Shiro Urayama, MD 58 43%
Laura Pestana, DO 54 41%
Ashwani Kapoor, MD 53 40%
Eric Mao, MD 50 38%
Eric Chak, MD 44 34%
Maneesh Dave, MD 44 34%
Lydia Aye, DO 28 24%
Souvik Sarkar, MD 25 22%
Cara Torruellas 22 20%
Michael Lawson, MD 21 20%
Palaniappan Manickam, MD 18 18%
Albert Do, MD 15 16%
Christopher Bowlus, MD 14 15%
Alexander Kuo, MD 12 14%
Neil Nedley, MD 12 14%
Loc Ton, MD 11 13%
Timothy Wang, MD 11 13%
Maria Aguilar, MD 1-10 13% or below
Ali Akram, MD 1-10 13% or below
Latifat Alli-Akintade, MD 1-10 13% or below
Ali Azarm, MD 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
Timothy Davern, 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
Jonathan Lin, 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
Hossein Movahed, 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
Shashank Vemala, 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.

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.

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).