Cataract surgery clinicians in Stanford, California

CMS lists 35 clinicians with a primary specialty of Ophthalmology who have billed Medicare for at least one cataract surgery and practice in Stanford, California (details below).

Cataract surgery volume

Clinician	Cataract surgeries billed	Percentile rank
Artis Montague, MD	363	84%
Robert Chang, MD	219	70%
Eubee Koo, MD	203	68%
Vikram Shankar, MD	179	64%
Charles Lin, MD	176	64%
Bethlehem Mekonnen, MD	156	60%
Chi Mong Or, MD	137	57%
Wendy Liu, MD	93	48%
Ann Fisher, MD	77	45%
Jennifer Rose-Nussbaumer, MD	76	45%
Yang Sun, MD	69	43%
Charles Yu, MD	49	37%
Geoffrey Tabin, MD	48	37%
Nathaniel Blecher, MD	47	37%
Steven Sanislo, MD	47	37%
Stephen Smith, MD	41	35%
Kuldev Singh, MD	39	34%
Diana Do, MD	30	31%
Gala Beykin, MD	23	28%
Ann Shue, MD	22	27%
Sachin Rajpal, MD	19	26%
Theodore Leng, MD	11	21%
Ahmad Al Moujahed, MD	1-10	21% or below
Dolly Chang, MD	1-10	21% or below
Charles Deboer, MD	1-10	21% or below
Jeffrey Goldberg, MD	1-10	21% or below
Loh-Shan Leung, MD	1-10	21% or below
Chase Ludwig, MD	1-10	21% or below
Prithvi Mruthyunjaya, MD	1-10	21% or below
Quan Nguyen, MD	1-10	21% or below
Amila Silva, MD	1-10	21% or below
Blake Snyder, MD	1-10	21% or below
Karen Wai, MD	1-10	21% or below
Sophia Wang, MD	1-10	21% or below
Melissa Yuan, 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).