Cataract surgery clinicians in Pasadena, California

CMS lists 41 clinicians with a primary specialty of Ophthalmology who have billed Medicare for at least one cataract surgery and practice in Pasadena, California (details below).

Cataract surgery volume

Clinician	Cataract surgeries billed	Percentile rank
Kristina Voss, MD	317	80%
David Yu	253	74%
Brian Chen, MD	246	73%
Sarjan Patel, MD	240	72%
Michael Miller, MD	236	72%
Vicky Pai, MD	192	66%
Bryan Jones, MD	181	65%
Arbi Khemichian, MD	181	65%
Gitane Patel, MD	160	61%
Marc Shomer, MD	150	60%
Dwayne Logan, MD	148	59%
Christopher Long, MD	138	57%
Victoria Yom, MD	129	56%
Brian Francis	122	54%
Ali Mahdavi Fard, MD	103	51%
Jay Patel, MD	99	50%
Sanjeev Grewal, MD	92	48%
Vivian Qin, MD	82	46%
Judy Chen, MD	77	45%
Benjamin Xu	75	44%
Van Nguyen, MD	63	41%
Phuc Le, MD	61	41%
Vikas Chopra, MD	54	39%
Kay Khine, MD	50	38%
Julia Song, MD	45	36%
Victoria Tseng, MD	37	33%
Michael Ward, DO	30	31%
Payam Amini, MD	29	31%
Colin McCannel, MD	25	29%
Jeffrey Hong, MD	20	27%
David Liao, MD	14	23%
Hossein Ameri, MD	1-10	21% or below
Almira Cann, MD	1-10	21% or below
Tom Chang, MD	1-10	21% or below
Michael Davis, MD	1-10	21% or below
Kirk Hou, MD	1-10	21% or below
Jason Jia, MD	1-10	21% or below
Juan Carlos Martinez Camarillo, MD	1-10	21% or below
Karen Morgan, MD	1-10	21% or below
Andrew Moshfeghi, MD	1-10	21% or below
Hyelin You, 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).