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Colonoscopy clinicians in Salt Lake City, Utah

CMS lists 69 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 Salt Lake City, Utah (details below).

Colonoscopy volume

Clinician Colonoscopies billed Percentile rank
Brien Miller, DO 430 99%
George Jeung, DO 364 98%
Dan Collins, MD 316 96%
Phillip Oberg, MD 309 96%
Peter Fenton, MD 260 94%
Umaprasanna Karnam, MD 251 94%
Matthew Feurer, MD 178 86%
Gordon Harmston, MD 178 86%
Andrew Heiner, MD 171 85%
Steven Desautels, MD 169 84%
Christopher Cutler, MD 154 81%
Edward Frech, MD 148 79%
Joseph Merrill, MD 132 75%
John David Schmidt, MD 131 75%
Robert Kyle Barnett, MD 109 67%
David Moore, MD 108 67%
John Erikson Yap, MD 104 66%
David Trowbridge, MD 100 64%
Chaya Krishnamurthy, MD 94 62%
Allison Venner, MD 90 60%
Jessica Stout, DO 83 57%
John Morris, MD 82 56%
Jason Wills, MD 80 55%
Michael Weaver, MD 79 54%
Rebecca Voaklander, MD 77 53%
Richard Craig, MD 75 52%
Christopher Maxwell, MD 75 52%
Bill Quach, MD 60 44%
Jason Dubroff, MD 57 42%
Darcie Gorman, MD 53 40%
Matthew Steenblik, MD 53 40%
Suryanarayana Challa, MD 51 39%
James Stewart, MD 49 38%
Bryan Silon, MD 47 36%
Judith Staub, MD 47 36%
Reid Hales, MD 46 36%
Ramon Minjares Granillo, MD 44 34%
Luke Gessel, MD 43 34%
Robert Bridge, MD 40 32%
John Fang, MD 40 32%
Kathryn Peterson, MD 40 32%
Mark Jensen, DO 38 30%
Amir Kashani, MD 38 30%
Michael Walker, MD 38 30%
Charlie Fox, MD 36 29%
Takayuki Suzuki, MD 35 28%
Keegan Colletier, MD 31 26%
Jessica Johnson 30 25%
Ann Flynn, MD 29 25%
Brett McGettigan, MD 28 24%
Nicholas Hannon, MD 26 23%
Nathaniel Kwak, MD 24 21%
Priscila Liberato De Mattos, MD 24 21%
Kathryn Byrne, MD 22 20%
Pratishtha Singh, MD 22 20%
Richard Gilroy, MD 21 20%
Tuan Pham, MD 20 19%
Amiko Uchida, MD 19 18%
Daryl Ramai, MD 17 17%
Christopher Ko, MD 15 16%
John Valentine, MD 11 13%
Christopher Danford, MD 1-10 13% or below
Juan Gallegos Orozco, MD 1-10 13% or below
Andrew Gawron, MD 1-10 13% or below
John Inadomi, MD 1-10 13% or below
Yii Chun Khiew, MD 1-10 13% or below
Joseph Redman, MD 1-10 13% or below
Jessica Shay, MD 1-10 13% or below
Ashok Tuteja, 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).