Dr. John Yichi Chen , MD
Ophthalmology • Boston, MA
750 Washington St, Tufts-Nemc #450
Boston, MA 021111526
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on January 2, 2008; this date does not establish years in practice.
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Published CMS data list 15 Original Medicare Part B services in 2018.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018. Published rows only; this is not a quality measure.
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Published Part B service records, 2018:
- 92012 — Established patient problem focused exam of visual system: 15 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2017 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2018). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 3,311 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost — 809 prescription fills, including refills.
- Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) — 632 prescription fills, including refills.
- Prednisolone Acetate — 376 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 28 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 90% of clinicians listed under Ophthalmology in Boston, MA (2024, 200 clinicians with data). Median for this group: 434. Middle half: 120 to 1,252.
More Part D prescriptions than 85% of clinicians listed under Ophthalmology in Massachusetts (2024, 517 clinicians with data). Median for this group: 764. Middle half: 219 to 2,063.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 14 in 2017 to 15 in 2018.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2018.
Practice Location & Contact Primary Location
750 Washington St
Tufts-Nemc #450
Boston, MA 021111526
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Permanente Medical Group Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Columbia University College Of Physicians And Surgeons
2006
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $1,445 in 2018
The total amount Medicare approved for these services in 2018. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018.
Paid by Medicare
About $930 in 2018
The part of the Medicare-allowed amount that Medicare itself paid in 2018, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018.
30-day fills
8,547 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$251,589 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $109.76 across 2 records.
By nature of payment
- Food and Beverage: $109.76 across 2 records.
Reporting-company totals
- Alcon Vision LLC: $109.76 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
20 years (graduated 2006)
CMS Doctors and Clinicians data list 2006 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2008
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Chen has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Chen as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Ophthalmology in Boston, MA (2024, 200 clinicians with data). Median for this group: 434. Middle half: 120 to 1,252.
More Part D prescriptions than 85% of clinicians listed under Ophthalmology in Massachusetts (2024, 517 clinicians with data). Median for this group: 764. Middle half: 219 to 2,063.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Ophthalmology in Boston, MA (2024, 200 clinicians with data). Median for this group: $26,962. Middle half: $3,441 to $138,014.
A higher Part D drug cost than 75% of clinicians listed under Ophthalmology in Massachusetts (2024, 517 clinicians with data). Median for this group: $61,248. Middle half: $7,840 to $214,090.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Chen are from 2018.
327 active clinicians are listed under Ophthalmology with a practice address in Boston, MA (792 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
5.2% of these 327 clinicians have the CMS telehealth indicator.
56.6% of these 327 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services went from 14 in 2017 to 15 in 2018.
- 2017: 14
- 2018: 15
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $1,337 in 2017 and $1,445 in 2018.
- 2017: $1,337
- 2018: $1,445
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Paid by Medicare
Paid by Medicare went from $678 in 2017 to $930 in 2018.
- 2017: $678
- 2018: $930
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 12% from 2,951 in 2020 to 3,311 in 2024.
- 2020: 2,951
- 2021: 3,032
- 2022: 2,818
- 2023: 3,616
- 2024: 3,311
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30-day fills
30-day fills increased 14% from 7,482 in 2020 to 8,547 in 2024.
- 2020: 7,482
- 2021: 7,833
- 2022: 7,450
- 2023: 9,188
- 2024: 8,547
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Part D drug cost
Part D drug cost decreased 19% from $310,600 in 2020 to $251,589 in 2024.
- 2020: $310,600
- 2021: $306,619
- 2022: $229,834
- 2023: $250,444
- 2024: $251,589
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $231.91 in 2023 to $109.76 in 2025.
- 2023: $231.91
- 2024: $110.11
- 2025: $109.76
Sources: CMS Medicare Physician & Other Practitioners (2018), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $109.76.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
|
HYDRUS Microstent | General | $75.00 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
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Clareon | General | $34.76 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2017 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2018; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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92012
Established patient problem focused exam of visual system
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15 | 11 | $192.00 | $96.31 |
Source: CMS Part B by Provider and Service, 2018; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Latanoprost | Latanoprost | 809 | 74,295 | $11,627.10 | 323 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 632 | 60,569 | $16,124.59 | 223 |
| Prednisolone Acetate | Prednisolone Acetate | 376 | 16,654 | $19,547.88 | 173 |
| Brimonidine Tartrate | Brimonidine Tartrate | 302 | 28,694 | $5,846.23 | 130 |
| Timolol Maleate | Timolol Maleate | 185 | 16,786 | $3,766.12 | 63 |
| Polymyxin B Sul-Trimethoprim | Polymyxin B Sulf/Trimethoprim | 119 | 2,620 | $1,500.04 | 95 |
| Dorzolamide-Timolol | Dorzolamide/Timolol/Pf | 113 | 5,155 | $15,904.14 | 25 |
| Brinzolamide | Brinzolamide | 102 | 9,243 | $35,418.58 | 41 |
| Tafluprost | Tafluprost/Pf | 101 | 5,490 | $25,001.20 | 27 |
| Dorzolamide Hcl | Dorzolamide Hcl | 74 | 6,914 | $2,039.78 | 31 |
| Rhopressa | Netarsudil Mesylate | 67 | 4,070 | $43,739.04 | 29 |
| Cyclosporine | Cyclosporine | 66 | 3,000 | $8,981.00 | 23 |
| Bimatoprost | Bimatoprost | 55 | 5,375 | $6,181.06 | 21 |
| Diclofenac Sodium | Diclofenac Sodium | 46 | 1,426 | $897.04 | 27 |
| Timolol Maleate | Timolol Maleate/Pf | 40 | 2,080 | $9,819.12 | 13 |
| Acetazolamide | Acetazolamide | 29 | 1,260 | $700.79 | 13 |
| Travoprost | Travoprost | 28 | 2,575 | $2,692.15 | 12 |
| Erythromycin | Erythromycin Base | 27 | 470 | $378.61 | 14 |
| Alphagan P | Brimonidine Tartrate | 20 | 1,712 | $17,205.66 | — |
| Valacyclovir | Valacyclovir Hcl | 18 | 512 | $740.49 | — |
| Ofloxacin | Ofloxacin | 18 | 376 | $298.18 | — |
| Fluorometholone | Fluorometholone | 13 | 500 | $1,618.29 | — |
| Cequa | Cyclosporine | 13 | 390 | $6,693.31 | — |
| Valganciclovir Hcl | Valganciclovir Hcl | 12 | 360 | $619.66 | — |
| Vyzulta | Latanoprostene Bunod | 12 | 930 | $7,889.78 | — |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207W00000X
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20111108000821
CA
2668596040
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Permanente Medical Group Inc
710 Lawrence Express Way, Santa Clara, CA 950515173
Phone: 4088511000
Permanente Medical Group Inc
700 Lawrence Expy, Santa Clara, CA 950515173
Phone: 4088511000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Ophthalmology
Doctor of Medicine (M.D.)
Optometrist
Doctor of Optometry
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology - Glaucoma Specialist
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated January 02, 2008.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Ophthalmology Specialists in Boston
- Dr. Dimitri Azar, MD
- Dr. Vikram Makhijani, DO
- Dr. David Sola-Del Valle, MD
- Dr. Daniel Liebman, MD
- Dr. Yandong Bian, MD
- Dr. Catherine Choi, MD
Mailing Address
750 Washington St, Tufts-Nemc #450
Boston, MA 021111526
Phone: 6176364600