Colonoscopy (diagnostic) in Nevada: the highest-volume physicians

55 physicians in Nevada billed Medicare for 1,613 colonoscopy (diagnostic) procedures in 2024. The top 25, with the year before beside it.

Procedure State

Top 25

Rank	Physician	2024	2023	Change
1	Michael S. Zimmerman, MDGastroenterology · Las Vegas	190	163	+17%
2	Rajat Sood, MDGastroenterology · Henderson	63	74	−15%
3	Ranadev Mukherjee, MDGastroenterology · N Las Vegas	47	48	−2%
4	Osama O. Haikal, MDGastroenterology · Las Vegas	46	111	−59%
4	Arumugam Sivakumar, MDGastroenterology · Henderson	46	34	+35%
6	Ayaaz Ismail, MDGastroenterology · Las Vegas	43	39	+10%
6	Frank J. Nemec, MDGastroenterology · Las Vegas	43	56	−23%
8	Vijay Jayaraman, MDGastroenterology · Las Vegas	42	47	−11%
9	Tousif Pasha, MDGastroenterology · Las Vegas	41	58	−29%
9	Nicolae Weisz, MDGastroenterology · Las Vegas	41	63	−35%
11	Brian J. Carlson, MDGastroenterology · North Las Vegas	39	28	+39%
12	Laura G. Gitlin, MDGastroenterology · Las Vegas	38	35	+9%
13	Jason M. Collins, MDGastroenterology · Carson City	37	35	+6%
13	Syed Abdul Basit, MDGastroenterology · Las Vegas	37	—
15	Gregory M. Kwok, MDGastroenterology · Las Vegas	35	33	+6%
16	Nasim M. Mcdermott, DOGastroenterology · Las Vegas	33	58	−43%
16	William Pfau, MDGastroenterology · Reno	33	32	+3%
16	Matthew Glover, MDInternal Medicine · Las Vegas	33	31	+6%
16	Muthena Maklad, MDGastroenterology · Henderson	33	—
20	Shahid Wahid, MDGastroenterology · N Las Vegas	32	48	−33%
20	Deb K. Mukhopadhyay, MDGastroenterology · Las Vegas	32	30	+7%
22	Jawad A. Jilani, DOGastroenterology · N Las Vegas	31	23	+35%
22	Tarek Ammar, MDGastroenterology · Las Vegas	31	22	+41%
24	Ting-Hui Hsieh, MDGastroenterology · Reno	29	40	−27%
25	Frank Faris, MDGastroenterology · Las Vegas	28	31	−10%

A rank counts procedures billed under the physician's own NPI (CPT 45378), in 2024, Medicare fee-for-service only. A surgeon who mostly treats younger or Medicare Advantage patients will rank lower than their total volume. Method and limits.