Dr. Catherine Q. Sun, MD

Dr. Sun practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.

Dr. Sun's NPI, 1396164547, was assigned on April 15, 2014. Dr. Sun graduated from UCSF School of Medicine in 2014. Dr. Sun's Florida license number on file is ME136250.

Dr. Sun's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.

Dr. Sun's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dr. Sun is also affiliated with Zuckerberg San Francisco General Hospital and Trauma Center. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Sun to 4 more medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sun practices, 2 sites in all. Vendor and product names are available with a free account.

Ophthalmology is Dr. Sun's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Sun is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Sun's licenses on file in 2 states: Florida and California.

Dmand AI lists cataract, cataract surgery with lens implant, dry eye, glaucoma, glaucoma surgery, secondary membranaous cataract surgery, vision problems and visual impairment and blindness among the conditions Dr. Sun treats.

CMS data shows 622 Medicare services from Dr. Sun across 6 procedure codes in 2024, for 179 Medicare patients. Medicare paid $24,026 for them.

CMS counts 179 Medicare patients who saw Dr. Sun in 2024. The largest group is 75 to 84, with 69 patients. 66% of them have high blood pressure, and 66% have high cholesterol. 41% are also on Medicaid. Their average risk score is 1.34, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Sun's median patient age at 77, with 42% women.

In 2024, Dr. Sun wrote 837 Medicare Part D claims for 162 patients. 55% of them were for generic drugs. CMS names the drug for 756 of them, across 14 drugs with 11 or more claims each, at $74,523 in total drug cost. In 2023, CMS named 671 claims across 15 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Sun for performance year 2024, reported as part of a group. Dr. Sun accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Sun as offering telehealth. CMS counts 16 procedures of cataract surgery by Dr. Sun, more than 40% of the clinicians it reports for that procedure.

Dmand AI links 18 papers to Dr. Sun, published from 2013 to 2025. 2023 was the busiest year, with 3. The most frequent topics are Antifungal Agents, Corneal Ulcer and Double-Blind Method. Dr. Sun has published most often in JAMA Ophthalmol. Dr. Sun's most frequent co-authors are Nisha Acharya, MD, Stephen D. McLeod, MD and Thomas M. Lietman, MD.

CMS Open Payments shows 25 general payments to Dr. Sun from 9 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 67% of the total. Alcon Research Ltd paid the most, $1,040.

Dr. Sun graduated from UCSF School of Medicine in 2014.

Dr. Sun is in network with 10 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.