Colonoscopy clinicians in Billings, Montana

CMS lists 39 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 Billings, Montana (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Richard Heard, MD	298	96%
Michelle Petro, MD	289	95%
James Underwood, MD	270	95%
Michael Fischer, MD	259	94%
Keri Hill, MD	236	92%
Reed Hogan, MD	224	91%
Ernest Williams, MD	220	91%
Reed Hogan, MD	217	91%
Jane Claire Williams, MD	215	90%
Yevgeniy Arefiev, MD	210	90%
Steven Hammond, MD	205	89%
David Bridgers, MD	198	88%
Mark Wilson, MD	183	87%
Wen Huan Ho, MD	174	85%
Pierce Dotherow, MD	158	82%
Ralph Vance, MD	154	81%
Andrew Gentry, MD	153	81%
Kim Almodovar, MD	148	79%
Robert Anderson, MD	140	77%
Ernest Weeks, MD	139	77%
Charles Hall, MD	125	73%
Stewart Boyd, MD	124	73%
Paul Dotherow, MD	124	73%
Stephen Baum, MD	118	71%
Russ Arjal, MD	71	50%
Shuja Yousuf, MD	71	50%
Nathaniel Spezia-Lindner, MD	61	45%
Andrei Gasic, MD	52	40%
Rushikesh Shah, MD	44	34%
Crystal Bernstein, MD	41	32%
Anupama Mathew, MD	37	30%
Alexander Mantas, MD	29	25%
Christie Mannino, MD	15	16%
Abdullah Al-Shahrani, MD	1-10	13% or below
Kathryn Hatch, MD	1-10	13% or below
Justin Mitchell, MD	1-10	13% or below
Raj Shah, MD	1-10	13% or below
Nirmal Singh, MD	1-10	13% or below
Sachin Wani, 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 (October 2, 2026 release).