Colonoscopy clinicians in Las Vegas, Nevada

CMS lists 50 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 Las Vegas, Nevada (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Vishal Gandotra, MD	1,079	99%
Tousif Pasha, MD	738	99%
Michael Zimmerman, MD	450	99%
Mohammed Shafi, MD	387	98%
Andrew Kim, MD	364	98%
Noel Fajardo, MD	324	97%
Filippo Cremonini, MD	254	94%
Muthena Maklad, MD	241	93%
Tarek Ammar, MD	233	92%
David Shih, MD	224	91%
Gregory Kwok, MD	206	89%
Vijay Jayaraman, MD	200	89%
Ayaaz Ismail, MD	184	87%
Deb Mukhopadhyay, MD	182	86%
John Ryan, MD	155	81%
Ghulam Mujtaba, MD	152	80%
Frank Faris, MD	148	79%
Christian Stone, MD	147	79%
Syed Abdul Basit, MD	144	78%
Frank Nemec, MD	141	78%
Gary Chen, MD	139	77%
Enrique Lacayo, MD	127	74%
Nicolae Weisz, MD	125	73%
Travis Vickers, DO	124	73%
Matthew Glover, MD	113	69%
Gayatri Vengayil, MD	112	69%
George Tan, MD	109	67%
Laura Gitlin, MD	100	64%
Donald Kwok, MD	93	61%
Brent Burnette, MD	88	59%
Yakov Shaposhnikov, MD	84	57%
James Han, MD	83	57%
Kaio Ferreira, MD	77	53%
Gilberto De La Torre, MD	62	45%
Christopher Chang, MD	59	44%
Sang Lee, MD	48	37%
Mara Posner, MD	44	34%
Martin Shill, MD	43	34%
Katrina Naik, MD	41	32%
Chaorui Tian, MD	38	30%
Thomas Chen, MD	34	28%
Vignan Manne, MD	34	28%
Henry Chiu, MD	26	23%
Jose Aponte Pieras, MD	24	21%
Juan Trivella, MD	19	18%
Gordon Ohning, MD	16	16%
Suaka Kagbo-Kue, MD	1-10	13% or below
Joseph Redman, MD	1-10	13% or below
Ardeshir Rohani, MD	1-10	13% or below
Amit Valera, DO	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.

Malwinder Sidhu, MD Last reported August 18, 2026

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).