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Colonoscopy clinicians in Omaha, Nebraska

CMS lists 58 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 Omaha, Nebraska (details below).

Colonoscopy volume

Clinician Colonoscopies billed Percentile rank
John Cannella, MD 179 86%
Michael Schafer, MD 179 86%
Tyron Alli, MD 169 84%
Trevor Pearson, MD 160 82%
Jordan Holmes, MD 156 81%
Benjamin Hall, MD 146 79%
Thomas McGinn, MD 134 76%
Grant Hutchins, MD 129 74%
Derrick Eichele, MD 122 72%
Kimberly Harmon, MD 118 71%
Helen Fasanya-Uptagraft, MD 112 69%
Kyle Rose, DO 108 67%
Alexander Bernal, MD 107 67%
Matthew McMahon, MD 107 67%
Rajani Rangray, MD 107 67%
Jason Cisler, MD 106 66%
Alexander Hewlett, MD 99 64%
Sheeva Parbhu, MD 99 64%
Rebecca Ehlers, MD 96 63%
Thoetchai Peeraphatdit, MD 96 63%
John Aita, MD 94 62%
Deepti Jacob, MD 94 62%
Suha Jabak, MD 92 61%
Brian Ward, MD 92 61%
William Livingston, DO 84 57%
Marc Scheer, DO 84 57%
Wuttiporn Manatsathit, MD 81 55%
Ahmed Al-Chalabi 79 54%
Jalpa Devi 78 54%
Timothy McCashland, MD 74 52%
Ishfaq Bhat, MD 63 46%
Robert Kizer, MD 62 45%
Aun Shah, MD 61 45%
Rohtashav Dhir, MD 60 44%
Shailender Singh, MD 58 43%
Sandeep Mukherjee, MD 57 42%
Sarah Malik 52 40%
Kathryn Hutchins, MD 47 36%
Jay Anderson, MD 40 32%
Shiva Shankar Vangimalla 40 32%
Erin Jenkins, MD 38 30%
Derrick Antoniak, MD 33 27%
Peter Mannon, MD 30 25%
James Simmons, MD 30 25%
Stephen Williams, MD 30 25%
Gary Volentine, MD 25 22%
Joseph Thomas, MD 21 20%
Jeremy King, DO 20 19%
Omar Khan, MD 18 18%
Nathalie Khoury, MD 18 18%
Sampath Poreddy 16 16%
Marco Olivera-Martinez, MD 13 14%
Paul Glowacki, MD 1-10 13% or below
Hwi Young Kim, MD 1-10 13% or below
Faruq Pradhan 1-10 13% or below
Fedja Rochling, MD 1-10 13% or below
Hemant Roy, MD 1-10 13% or below
Jered Windorski, 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).