Cataract surgery clinicians in Riverside, California

CMS lists 37 clinicians with a primary specialty of Ophthalmology who have billed Medicare for at least one cataract surgery and practice in Riverside, California (details below).

Cataract surgery volume

Clinician	Cataract surgeries billed	Percentile rank
Michael Rauser, MD	243	73%
Ray Glendrange, MD	220	70%
David Sierpina, MD	165	62%
Francisco Pabalan, MD	153	60%
Dwayne Logan, MD	148	59%
Frank Hwang, MD	91	48%
Eric Chan, MD	88	47%
Samantha Perea, MD	81	46%
John Liu, MD	69	43%
Jean Cheng, MD	54	39%
Jack Creagmile, MD	54	39%
Ahmad Mansury, MD	43	35%
Christian Bardan, MD	37	33%
William May, MD	33	32%
Bea Martina Palileo, MD	29	31%
Khalid Aldaas, MD	16	24%
Eric Chin, MD	15	24%
John Affeldt, MD	1-10	21% or below
Marib Akanda, MD	1-10	21% or below
Safa Arfeen, MD	1-10	21% or below
John Carlson, MD	1-10	21% or below
Jason Chow, MD	1-10	21% or below
Mausam Damani, MD	1-10	21% or below
Tinny Dinh, MD	1-10	21% or below
Michael Fikhman, MD	1-10	21% or below
Suzie Gasparian, MD	1-10	21% or below
Garima Lal, MD	1-10	21% or below
William Lim, MD	1-10	21% or below
Wei Chuan Liu, MD	1-10	21% or below
Paramdeep Mand, MD	1-10	21% or below
Jay Mattheis, MD	1-10	21% or below
Pho Nguyen, MD	1-10	21% or below
Zackery Oakey, MD	1-10	21% or below
Hung Pham, MD	1-10	21% or below
Priyal Shah, MD	1-10	21% or below
Shahin Shahrokni, MD	1-10	21% or below
Daniel Yau, MD	1-10	21% or below

Sorted by the number of cataract surgeries 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 "Cataract surgery" category combines specific billing codes for cataract surgery to calculate the number of times each clinician billed Medicare for a "Cataract surgery." These include lens replacement surgery and YAG laser capsulotomy, a laser treatment that can follow cataract surgery. 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 cataract surgeries a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Ophthalmology (as reported to Medicare) are presented.

Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).