InflammationNuclear Proteins
Dr. John Yichi Chen, MD
NPI1366627879PAC ID2668596040
- Medicare services, 2018
- 15
- Part D claims, 2024
- 3,427
- Publications
- 4
- Industry payments
- $557
- Affiliated sites
- 1
- Practice address
- 710 Lawrence Expy, Santa Clara, CA 95051
- Practice phone
- Call (408) 851-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Santa Clara, California
Find Dr. Chen's professional email, personal email and mobile number
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Dr. John Yichi Chen is an ophthalmologist in Santa Clara, California
Dr. Chen practices at Permanente Medical Group Inc in Santa Clara, California.
Dr. Chen's NPI, 1366627879, was assigned on January 2, 2008. Dr. Chen graduated from Vagelos College of Physicians and Surgeons in 2006. Dr. Chen's Massachusetts license number on file is 233230.
NPI and contact details
- NPI
- 1366627879NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668596040
- NPI enumeration date
- January 2, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (408) 851-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Yichi Chen practices at Permanente Medical Group Inc in Santa Clara, California
Dr. Chen's primary practice is Permanente Medical Group Inc, at 710 Lawrence Expy, Santa Clara, CA 95051 in Santa Clara County. The practice phone is (408) 851-1000.
- Permanente Medical Group Inc710 Lawrence Expy, Santa Clara, CA 95051 · Santa Clara CountyPhone(408) 851-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Yichi Chen is affiliated with 2 sites of care and 1 medical group
Dr. Chen's primary practice is Permanente Medical Group Inc in Santa Clara, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Chen to 1 more group practice or clinic, named with a free account.
Permanente Medical Group IncPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Yichi Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Yichi Chen is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Chen is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Chen's licenses on file in 3 states: Massachusetts, California and New Mexico.
Specialties and state licenses
- Ophthalmology, MassachusettsPrimary
- California license
- New Mexico license
Clinical focus
Dmand AI lists glaucoma, glaucoma surgery and secondary membranaous cataract surgery among the conditions Dr. Chen treats.
Ophthalmologists near Dr. 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
Dr. John Yichi Chen billed Medicare for 15 services in 2018
CMS data shows 15 Medicare services from Dr. Chen across 1 procedure code in 2018. Medicare paid $930 for them. Every service was in an office.
Medicare services, 201815
Paid by Medicare$930
Procedure codes1
Dr. Chen's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Tests and treatments
- 2017: 142018: 157%
Dr. Chen compared with the California median for ophthalmologists, 2018
- Dr. Chen
- California median
- Medicare services
- 15vs 1,07999% below
- Part D claims
- 3,311vs 6185.4 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Chen's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Chen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Yichi Chen's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 70, with 59% women.
Dr. 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 70
Patient panel by sex, all payers
- Women59%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. John Yichi Chen wrote 3,427 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 3,427 Medicare Part D claims for 699 patients. 77% of them were for generic drugs. CMS names the drug for 3,311 of them, across 26 drugs with 11 or more claims each, at $251,589 in total drug cost. In 2023, CMS named 3,616 claims across 27 drugs.
Part D claims, 20243,427
Drugs named by CMS26
Total drug cost$251,589
Part D patients699
Dr. Chen's Part D claims by kind of drug, 2024
- Generic2,637 claims77%
- Brand-name790 claims23%
Dr. 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,6162024: 3,3118%
Drugs named by CMS: 26 in 2024, 27 in 2023.
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
Dr. John Yichi Chen offers telehealth to Medicare patients
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Yichi Chen has 4 publications on record
Dmand AI links 4 papers to Dr. Chen, published from 2012 to 2014. 2014 was the busiest year, with 2. The most frequent topics are Nuclear Proteins. Dr. Chen has published most often in J Dent Res. Dr. Chen's most frequent co-authors are Seanna Kim, MD, Jeffrey Gordon Odel, MD and Liyan Zhang, MD.
Papers4
Years published2012 to 2014
Topics Dr. Chen writes about most
- Nuclear Proteins
Dr. Chen's most frequent co-authors
Recent publications by Dr. Chen
Acid PhosphataseAlveolar Bone LossCathepsin K
Arzneimittelforschung
Anti-Bacterial AgentsArea Under CurveAsian People
Invest Ophthalmol Vis Sci
ElectroretinographyEvoked Potentials, VisualReaction Time
See who Dr. Chen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chen works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Yichi Chen received $557 in industry payments from 2016 to 2025
CMS Open Payments shows 8 general payments to Dr. Chen from 2 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $483.
General payments to Dr. Chen by program year, 2016 to 2025
Companies that paid Dr. Chen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Yichi Chen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chen, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chen
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. John Yichi Chen graduated from Vagelos College of Physicians and Surgeons
Dr. Chen graduated from Vagelos College of Physicians and Surgeons in 2006.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. John Yichi Chen accepts plans from 2 insurance carriers
Dr. Chen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Chen accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Yichi Chen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Yichi 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 Dr. John Yichi Chen's NPI number?
Dr. John Yichi Chen's NPI number is 1366627879. It was assigned on January 2, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. John Yichi Chen?
Dr. John Yichi Chen is an ophthalmologist in Santa Clara, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John Yichi Chen practice?
Dr. Chen practices at 710 Lawrence Expy, Santa Clara, CA 95051. Dr. Chen's primary practice is Permanente Medical Group Inc in Santa Clara, California. Dmand AI also links Dr. Chen to 1 group practice or clinic.
What is Dr. John Yichi Chen's office phone number?
The practice phone on file for Dr. Chen is (408) 851-1000.
What is Dr. John Yichi Chen's medical license number?
Dr. Chen's Massachusetts license number on file is 233230, one of the licenses on file in 3 states.
Which states has Dr. John Yichi Chen been licensed in?
Dmand AI has state licenses on file for Dr. Chen in Massachusetts (2010 to 2013), California (2011 to 2027) and New Mexico (2009).
What medical group is Dr. John Yichi Chen part of?
Dr. Chen is linked to The Permanente Medical Group, Inc.
Does Dr. John Yichi Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 15 services in 2018, and Dr. Chen accepts Medicare assignment.
Does Dr. John Yichi Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
Is Dr. John Yichi Chen board certified?
Yes. Dr. Chen is board certified in ophthalmology by the American Board of Ophthalmology.
Show 8 more questionsShow fewer questions
What services does Dr. John Yichi Chen bill to Medicare?
In 2018, Dr. Chen's most billed Medicare services were eye exam or test (92012).
Where did Dr. John Yichi Chen go to medical school?
Dr. Chen graduated from Vagelos College of Physicians and Surgeons in 2006.
What drugs does Dr. John Yichi Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Prednisolone Acetate.
Has Dr. John Yichi Chen received payments from drug or device companies?
CMS Open Payments shows $557 in general payments to Dr. Chen from 2 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. John Yichi Chen been practicing?
Dr. Chen graduated from medical school in 2006, 20 years ago.
Does Dr. John Yichi Chen do research?
Dmand AI links 4 publications to Dr. Chen, published from 2012 to 2014.
Who does Dr. John Yichi Chen publish with?
Dr. Chen's most frequent co-authors are Seanna Kim, MD (1 shared paper), Jeffrey Gordon Odel, MD (1 shared paper) and Liyan Zhang, MD (1 shared paper).
What insurance does Dr. John Yichi Chen accept?
Dr. Chen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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