Katherine Grace Chen, MS

  • Oakland, CA
  • Ophthalmologist
NPI1699237420PAC ID4880013572
Medicare services, 2024
270
Medicare patients, 2024
193
Part D claims, 2024
1,212
Publications
8
MIPS score, 2024
96
Practice address
80 Grand Ave, Oakland, CA 94612
Practice phone
Call (510) 451-1875
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Webster Surgery Center

Oakland, California

See all 6 affiliations

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Katherine Grace Chen is an ophthalmologist in Oakland, California

Katherine Chen practices at Webster Surgery Center in Oakland, California.

Katherine Chen's NPI, 1699237420, was assigned on April 1, 2019. Katherine Chen graduated from UC Irvine School of Medicine in 2019. Katherine Chen holds California license A184907.

NPI and contact details
Medicare PAC ID
4880013572
NPI enumeration date
April 1, 2019
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(510) 451-1875
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
33
Medical school graduation
2019

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Katherine Grace Chen practices at Webster Surgery Center in Oakland, California

Katherine Chen's primary practice is Webster Surgery Center, at 80 Grand Ave, Oakland, CA 94612 in Alameda County. The practice phone is (510) 451-1875.

  • Webster Surgery Center
    80 Grand Ave, Oakland, CA 94612 · Alameda CountyPhone(510) 451-1875

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Katherine Grace Chen is affiliated with 4 sites of care and 2 medical groups

Katherine Chen's primary practice is Webster Surgery Center in Oakland, California. Katherine Chen is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. Dmand AI also links Katherine Chen to 2 more group practices and clinics and 2 medical groups, each named with a free account.

See all 6 affiliations for Katherine Chen

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Katherine Grace Chen's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Katherine Chen practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Webster Surgery CenterAvailable with a free account
+3 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Katherine Grace Chen is one of 2,621 ophthalmologists in California

Ophthalmology is Katherine Chen's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Katherine Chen is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Katherine Chen's licenses on file in 2 states: California and Illinois.

Specialties and state licenses

  • Ophthalmology, CaliforniaPrimaryLicense A184907 · 2023 to 2027 · taxonomy 207W00000X
  • Student in an organized health care education/training program, IllinoisLicense 125.076053 · 2020 to 2023 · taxonomy 390200000X

Clinical focus

Dmand AI lists cataract surgery with lens implant, eyelid inflammation and secondary membranaous cataract surgery among the conditions Katherine Chen treats.

Ophthalmologists near Katherine Chen

Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Katherine Grace Chen billed Medicare for 270 services in 2024

CMS data shows 270 Medicare services from Katherine Chen across 10 procedure codes in 2024, for 193 Medicare patients. Medicare paid $24,350 for them. Every service was in an office.

Medicare services, 2024270
Medicare patients193
Paid by Medicare$24,350
Procedure codes10

Katherine Chen's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 02024: 155
Office and hospital visits
2023: 132024: 93615%
Surgery
2023: 132024: 2269%

Katherine Chen compared with the California median for ophthalmologists, 2024

  • Katherine Chen
  • California median
Medicare services
270vs 1,07975% below
Medicare patients
193vs 42154% below
Part D claims
1,055vs 61871% above

Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.

Katherine Chen's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

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Medicare shows one payer. Book a meeting to get commercial claims data for Katherine Chen and other ophthalmologists in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Katherine Grace Chen treated 193 Medicare patients in 2024, average age 75

CMS counts 193 Medicare patients who saw Katherine Chen in 2024. The largest group is 65 to 74, with 80 patients. 69% of them have high cholesterol, and 63% have high blood pressure. 20% are also on Medicaid. Their average risk score is 1.49, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Katherine Chen's median patient age at 68, with 58% women.

Medicare patients, 2024193
Average age75
Average risk score1.49
Also on Medicaid20%

Katherine Chen's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Katherine Chen's Medicare patients by sex, 2024

  • Women11962%
  • Men7438%

Chronic conditions among Katherine Chen's Medicare patients, 2024

  1. High cholesterol69%
  2. High blood pressure63%
  3. Arthritis46%
  4. Chronic kidney disease26%
  5. Osteoporosis26%
  6. Diabetes24%
  7. Anxiety21%
  8. Ischemic heart disease21%

Share of Medicare patients with each condition. A patient can have several.

Katherine Chen's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 68

Patient panel by sex, all payers

  • Women58%
  • Men36%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Katherine Grace Chen wrote 1,212 Medicare Part D claims in 2024

In 2024, Katherine Chen wrote 1,212 Medicare Part D claims for 354 patients. 43% of them were for generic drugs. CMS names the drug for 1,055 of them, across 22 drugs with 11 or more claims each, at $700,758 in total drug cost. In 2023, CMS named 627 claims across 13 drugs.

Part D claims, 20241,212
Drugs named by CMS22
Total drug cost$700,758
Part D patients354

Katherine Chen's Part D claims by kind of drug, 2024

  • Generic523 claims43%
  • Brand-name689 claims57%

Katherine Chen's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Katherine Chen's Part D claims, 2024

  • Antibiotics1%16 of 1,212 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 6272024: 1,05568%

Drugs named by CMS: 22 in 2024, 13 in 2023.

See all prescribing by Katherine Chen

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Katherine Grace Chen scored 96 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Katherine Chen for performance year 2024, reported as part of a group. Katherine Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 41 procedures of cataract surgery by Katherine Chen, more than 59% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Katherine Chen's MIPS scores, performance year 2024

  • 96of 100Final score
  • 98.6of 100Quality
  • 89of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Katherine Chen ranks in Medicare procedure volume

Cataract surgery
59th percentile41 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Katherine Grace Chen has 8 publications on record

Dmand AI links 8 papers to Katherine Chen, published from 2013 to 2024. The most frequent topics are Tomography, Optical Coherence, Macular Degeneration and Tomography, X-Ray Computed. Katherine Chen's most frequent co-authors are Amisha Dave, Sruti Sarvari Akella, MD and Marjan Farid, MD.

Papers8
Years published2013 to 2024

Katherine Chen's papers by year, 2013 to 2024

Topics Katherine Chen writes about most

  • Tomography, Optical Coherence
  • Macular Degeneration
  • Tomography, X-Ray Computed
  • Visual Acuity

Katherine Chen's most frequent co-authors

Recent publications by Katherine Chen

See all 8 publications and co-authors

See who Katherine Chen researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Katherine Chen works with, so you can find a warm path to the right ophthalmologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Katherine Grace Chen received $5,267 in industry payments from 2020 to 2025

CMS Open Payments shows 75 general payments to Katherine Chen from 17 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 47% of the total. Bausch Health Americas, Inc. paid the most, $2,078.

General payments to Katherine Chen by program year, 2020 to 2025

General payments to Katherine Chen by kind, 2020 to 2025

$5.3Kin total
  • Food and beverage$2,49347%
  • Travel and lodging$1,47428%
  • Honoraria$1,20023%
  • Education$1002%

Companies that paid Katherine Chen the most, 2020 to 2025

Share is of all general payments to this clinician.

See all payments to Katherine Chen

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Katherine Grace Chen graduated from UC Irvine School of Medicine

Katherine Chen graduated from UC Irvine School of Medicine in 2019.

  1. Medical schoolUC Irvine School of Medicine
  2. Board certified in family medicineAmerican Board of Family Medicine

Source: Dmand AI Professional Profile Data

Katherine Grace Chen accepts plans from 8 insurance carriers

Katherine Chen is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare

Plan types Katherine Chen accepts, by number of carriers

  1. Medicare6
  2. PPO5
  3. HMO3
  4. POS3
  5. EPO2

Source: Dmand AI Insurance Network Data

Sources for Katherine Grace Chen's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Katherine Grace Chen

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Katherine Grace Chen's NPI number?

Katherine Grace Chen's NPI number is 1699237420. It was assigned on April 1, 2019, and it is active in the NPI Registry.

What does Katherine Grace Chen specialize in?

Katherine Grace Chen is an ophthalmologist in Oakland, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).

Where does Katherine Grace Chen practice?

Katherine Chen practices at 80 Grand Ave, Oakland, CA 94612. Katherine Chen's primary practice is Webster Surgery Center in Oakland, California. Dmand AI also links Katherine Chen to 2 group practices and clinics and 2 medical groups.

What is Katherine Grace Chen's office phone number?

The practice phone on file for Katherine Chen is (510) 451-1875.

What is Katherine Grace Chen's medical license number?

Katherine Chen holds California license A184907, one of the licenses on file in 2 states.

Which states has Katherine Grace Chen been licensed in?

Dmand AI has state licenses on file for Katherine Chen in California (2023 to 2027) and Illinois (2020 to 2023).

Which hospitals is Katherine Grace Chen affiliated with?

Katherine Chen is affiliated with Alta Bates Summit Medical Center | Alta Bates Campus.

Does Katherine Grace Chen accept Medicare?

Yes. CMS data shows Katherine Chen billed Medicare for 270 services in 2024, and Katherine Chen accepts Medicare assignment.

What is Katherine Grace Chen's MIPS score?

Katherine Chen's MIPS final score for performance year 2024 is 96 out of 100, reported as part of a group.

How many Medicare patients does Katherine Grace Chen see?

CMS counts 193 Medicare patients who saw Katherine Chen in 2024, with an average age of 75.

Show 9 more questionsShow fewer questions

Is Katherine Grace Chen board certified?

Yes. Katherine Chen is board certified in family medicine by the American Board of Family Medicine.

What services does Katherine Grace Chen bill to Medicare?

In 2024, Katherine Chen's most billed Medicare services were office visit, established patient (99214), eye exam or test (92012) and eye exam or test (92250).

Where did Katherine Grace Chen go to medical school?

Katherine Chen graduated from UC Irvine School of Medicine in 2019.

What drugs does Katherine Grace Chen prescribe most?

In 2024 Medicare Part D data, Katherine Chen's most prescribed drugs by claims were Prednisolone Acetate, Moxifloxacin and Restasis.

Has Katherine Grace Chen received payments from drug or device companies?

CMS Open Payments shows $5,267 in general payments to Katherine Chen from 17 companies from 2020 to 2025. The largest total came from Bausch Health Americas, Inc.

How long has Katherine Grace Chen been practicing?

Katherine Chen graduated from medical school in 2019, 7 years ago.

Does Katherine Grace Chen do research?

Dmand AI links 8 publications to Katherine Chen, published from 2013 to 2024.

Who does Katherine Grace Chen publish with?

Katherine Chen's most frequent co-authors are Amisha Dave (2 shared papers), Sruti Sarvari Akella, MD (1 shared paper) and Marjan Farid, MD (1 shared paper).

What insurance does Katherine Grace Chen accept?

Katherine Chen is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

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