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Colonoscopy clinicians in Baltimore, Maryland

CMS lists 121 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 Baltimore, Maryland (details below).

Colonoscopy volume

Clinician Colonoscopies billed Percentile rank
Sergey Kantsevoy, MD 435 99%
Niraj Jani, MD 366 98%
Richard Desi, MD 355 97%
Eun Shin, MD 338 97%
Scott Huber, MD 335 97%
Patrick Hyatt, MD 311 96%
Saowanee Ngamruengphong, MD 291 96%
James Corkum, MD 254 94%
Rohan Mandaliya, MD 231 92%
Matilda Hagan, MD 226 91%
Gary Thompson, MD 223 91%
Calvin Parker, MD 222 91%
Lawrence Mills, MD 201 89%
Jonathan Schreiber, MD 199 89%
Abhinav Sankineni, MD 179 86%
Michael Asike, MD 168 84%
Walid Chalhoub, MD 168 84%
Ruben Khan, MD 165 83%
Lester Bowser, MD 156 81%
Merve Gurakar, MD 152 80%
David Hutcheon, MD 151 80%
Raymond Cross, MD 149 80%
Tahir Shaikh, MD 147 79%
Jahangir Khan, MD 144 78%
Joseph Lin, MD 144 78%
Dhanush Hoskere, DO 143 78%
Anthony Kalloo, MD 142 78%
John Rabine, MD 138 77%
Mouen Khashab, MD 137 77%
Abhijit Bhatia, MD 131 75%
Jasmine Barrow, MD 129 74%
Dana Sloane, MD 128 74%
Olaya Brewer Gutierrez, MD 127 74%
Anurag Maheshwari, MD 127 74%
Mark Diamond, MD 126 73%
Bedoor Alabbas, MD 122 72%
Anusha Vittal, MD 117 70%
Hassan Ghoz, MD 115 70%
Alan Chen, MD 113 69%
Mark Lazarev, MD 111 68%
Robert Bulat, MD 106 66%
Mohammad Khan, MD 103 65%
Mark Mattar, MD 95 62%
Alia Dadabhai, MD 93 61%
Christopher Kim, MD 93 61%
Gerard Mullin, MD 93 61%
Vinshi Khan, MD 90 60%
Bryan Curtin, MD 89 59%
Venkata Akshintala, MD 88 59%
Samer Charbel, MD 85 58%
Mian Khalid, MD 84 57%
Reezwana Chowdhury, MD 81 55%
Sudhir Dutta, MD 80 55%
Monika Lammi, MD 80 55%
Ekta Gupta, MD 78 54%
Zadid Haq, MD 78 54%
Sasan Sakiani, MD 78 54%
Sara Yacyshyn, MD 76 53%
Zara Manuelyan, MD 75 52%
Hazel Veloso, MD 73 51%
Shervin Shafa, MD 70 50%
Eric Goldberg, MD 68 49%
Lauren George, MD 67 48%
Marcia Canto, MD 63 46%
Maen Kamal, MD 62 45%
Vikesh Singh, MD 62 45%
Maaza Abdi, MD 54 41%
George Kunnackal John, MD 53 40%
Aline Charabaty Pishvaian, MD 47 36%
Hyun Ji, MD 47 36%
Abdulhameed Al-Sabban, MD 45 35%
Neha Jakhete, MD 44 34%
Disha Sharma, MD 43 34%
Mohammed El-Dallal, MD 42 33%
Dania Hudhud, MD 40 32%
Nathalie Urrunaga, MD 40 32%
John Affronti, MD 39 31%
Elham Afghani, MD 39 31%
Kanhai Farrakhan, MD 39 31%
Paul Thuluvath, MD 39 31%
Ashish Nimgaonkar, MD 38 30%
Margaret Keane, MD 37 30%
Romik Srivastava, MD 36 29%
Ali Alsayed Hussain, MD 34 28%
Anita Sivaraman, MD 33 27%
Sameer Khan, MD 31 26%
Omer Shahab, MD 31 26%
Bruce Greenwald, MD 30 25%
Bilal Ali, MD 29 25%
Angelica Nocerino, MD 29 25%
Jose Parungao, MD 26 23%
Michael Goggins, MD 25 22%
Shandiz Shahbazi, MD 24 21%
Yousef Fazel, MD 23 21%
James Hamilton, MD 22 20%
Florin Selaru, MD 22 20%
Abdalla Khouqeer, MD 21 20%
Tsion Abdi, MD 20 19%
Anwar Khokhar, MD 20 19%
Moorkath Unni, MD 16 16%
Ken Hui, MD 15 16%
Michelle Ma, MD 15 16%
Tinsay Woreta, MD 14 15%
Zachariah Foda, MD 12 14%
Nishant Tripathi, MD 12 14%
Eduardo Gonzalez-Velez, MD 11 13%
Mateen Awan, MD 1-10 13% or below
Kathy Bull-Henry, MD 1-10 13% or below
Peter Darwin, MD 1-10 13% or below
Naresh Khanna, MD 1-10 13% or below
Iris Lee, MD 1-10 13% or below
Filipa Ligeiro, MD 1-10 13% or below
Zurabi Lominadze, MD 1-10 13% or below
Joanna Melia, MD 1-10 13% or below
Adrienne Nguyen, MD 1-10 13% or below
Amol Rangnekar, MD 1-10 13% or below
Kirti Shetty, MD 1-10 13% or below
Bipin Turakhia, MD 1-10 13% or below
Erik Vonrosenvinge, MD 1-10 13% or below
Jordan Wolff, MD 1-10 13% or below
Guofeng Xie, 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).