John Yichi Chen, M.D.
Ophthalmology Physician · Boston, MA
John Yichi Chen, M.D. is an ophthalmology physician with a practice address in Boston, Massachusetts, and NPI 1366627879, issued on Jan 2, 2008. Check the license (Massachusetts 233230, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Yichi Chen
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 233230 MA
Self-reported in NPPES; status is on the state search - Practice location
- 750 Washington St, Boston, MA 02111
- Phone
- (617) 636-4600
- Enumerated
- Jan 2, 2008
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111108000821); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2006
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 791 in Massachusetts → Look up another NPI →
Also registered at 750 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maureen Abbott, NPAdult Health Nurse Practitioner1457591638
- Paul Abourjaily, PHARMDPharmacotherapy Pharmacist1255337044
- Lori Abrahamian, M.D.Anesthesiology Physician1528012192
- Mary Ahern, PMHCNS-BCPsychiatric/Mental Health Clinical Nurse Specialist1619137742
- Ghada Al Mubarak, M.D.Surgery Physician1407034911
- Abeer Al-Naqbi, M.D.Obstetrics & Gynecology Physician1043426919
Verify John Yichi Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 233230Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average ophthalmology physician in 2024
3,427 Medicare Part D claims for 699 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Latanoprost809 claims
- Dorzolamide-Timolol632 claims
- Prednisolone Acetate376 claims
- Brimonidine Tartrate302 claims
- Timolol Maleate185 claims
- Polymyxin B Sul-Trimethoprim119 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $110.11
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Yichi Chen among 791 ophthalmology physician records in Massachusetts
John Yichi Chen, M.D. is one of 791 ophthalmology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2006 · median 2002 among the 518 with a school on file
- Record last updated2021 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Massachusetts
There are 791 ophthalmology physician records in Massachusetts.
All 791 in Massachusetts → Every provider in Boston → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Alison Callahan, MDBoston, MA 021111992016059
- Catherine Choi, M.D.Boston, MA 021111235428178
- Mitesh Kapadia, M.D.Boston, MA 021111245212364
- Robert Kershner, M.D.Boston, MA 021111922115500
- Narae Ko, MDBoston, MA 021111649532276
- Kamden KopaniBoston, MA 021111902034259
- Michelle Liang, M.D.Boston, MA 021111437483310
- Caroline Marten-Ellis, MDBoston, MA 021111912014309
Common questions
What is John Yichi Chen, M.D.'s NPI number?
John Yichi Chen, M.D.'s National Provider Identifier (NPI) is 1366627879, issued on Jan 2, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Yichi Chen, M.D. located?
The NPPES record lists a practice address at 750 Washington St, Boston, MA, 02111. Phone: (617) 636-4600. Providers update this record themselves, so call before visiting.
How can I verify John Yichi Chen, M.D.'s license?
NPPES lists Massachusetts license number 233230, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Yichi Chen, M.D. prescribe under Medicare Part D?
In 2024, John Yichi Chen, M.D. had 3,427 Medicare Part D claims for 699 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.