Colonoscopy clinicians in Brighton, Michigan
CMS lists 33 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 Brighton, Michigan (details below).
Colonoscopy volume
| Clinician | Colonoscopies billed | Percentile rank |
|---|---|---|
| Jonathan Xia, MD | 83 | 56% |
| Eric Shah, MD | 72 | 51% |
| Mary Mortell, MD | 70 | 50% |
| Gregory Piech, MD | 65 | 47% |
| Matthew Sturm, MD | 63 | 46% |
| Albert Kim, MD | 59 | 44% |
| Juhee Kim | 55 | 42% |
| Darashana Punglia, MD | 51 | 39% |
| Margaret Blayney | 48 | 38% |
| Mary Takami, MD | 48 | 38% |
| Matthew Dimagno, MD | 47 | 37% |
| Michael Rice, MD | 42 | 34% |
| Jeffery Berinstein, MD | 39 | 32% |
| Borko Nojkov, MD | 39 | 32% |
| Neil Sheth, MD | 36 | 30% |
| Tannaz Guivatchian, MD | 30 | 26% |
| Joan Chen, MD | 27 | 24% |
| Shrinivas Bishu, MD | 23 | 22% |
| Kira Newman, MD | 23 | 22% |
| Sonja Dawsey, MD | 21 | 20% |
| Joseph Kolars, MD | 21 | 20% |
| Joel Rubenstein, MD | 18 | 18% |
| Alisa Likhitsup, MD | 16 | 17% |
| Graham Brady, MD | 14 | 15% |
| Andrew Read, MD | 13 | 15% |
| Allen Lee, MD | 11 | 13% |
| Joy Chang, MD | 1-10 | 13% or below |
| Vincent Chen, MD | 1-10 | 13% or below |
| William Chey, MD | 1-10 | 13% or below |
| Kelly Cushing-Damm, MD | 1-10 | 13% or below |
| Hellan Kwon, MD | 1-10 | 13% or below |
| Lawrence Leung | 1-10 | 13% or below |
| Nataliya Razumilava, 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).