Dr. Michael K Yoon , MD
Ophthalmology โข Boston, MA
243 Charles St, 10 Floor Oculoplastics
Boston, MA 021143002
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 May 7, 2007; this date does not establish years in practice.
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Published CMS data list 984 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 92012 โ Established patient problem focused exam of visual system: 221 service units.
- 92014 โ Established patient complete exam of visual system: 202 service units.
- 92004 โ New patient complete exam of visual system: 77 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 18 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 33 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Erythromycin (Erythromycin Base) โ 21 prescription fills, including refills.
- Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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Close to the middle for Medicare Part B services among clinicians listed under Ophthalmology in Boston, MA (2024, 180 clinicians with data). Median for this group: 1,057. Middle half: 277 to 2,414.
Fewer Medicare Part B services than 65% of clinicians listed under Ophthalmology in Massachusetts (2024, 482 clinicians with data). Median for this group: 1,836. Middle half: 620 to 3,509.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 829 in 2020 to 984 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
243 Charles St
10 Floor Oculoplastics
Boston, MA 021143002
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 3 distinct group names: Beth Israel Deaconess Medical Center Inc; Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc; Massachusetts Eye And Ear Associates, 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
Albany Medical College Of Union University
2004
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
605 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $142,083 in 2024
The total amount Medicare approved for these services in 2024. 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 โ by Provider and Service, 2024.
Paid by Medicare
About $106,986 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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 โ by Provider and Service, 2024.
30-day fills
34 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
$609 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 โ by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $18.13 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
22 years (graduated 2004)
CMS Doctors and Clinicians data list 2004 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
2007
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, โDoes your provider accept Medicare as full payment?โ
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. Yoon 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. Yoon 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 B services
Close to the middle for clinicians listed under Ophthalmology in Boston, MA (2024, 180 clinicians with data). Median for this group: 1,057. Middle half: 277 to 2,414.
Fewer Medicare Part B services than 65% of clinicians listed under Ophthalmology in Massachusetts (2024, 482 clinicians with data). Median for this group: 1,836. Middle half: 620 to 3,509.
Medicare-allowed amount
Close to the middle for clinicians listed under Ophthalmology in Boston, MA (2024, 180 clinicians with data). Median for this group: $110,271. Middle half: $25,163 to $220,753.
Close to the middle for clinicians listed under Ophthalmology in Massachusetts (2024, 482 clinicians with data). Median for this group: $194,367. Middle half: $57,908 to $416,629.
Paid by Medicare
A higher Medicare payment amount than 60% of clinicians listed under Ophthalmology in Boston, MA (2024, 180 clinicians with data). Median for this group: $81,255. Middle half: $18,640 to $162,894.
Close to the middle for clinicians listed under Ophthalmology in Massachusetts (2024, 482 clinicians with data). Median for this group: $144,463. Middle half: $40,965 to $304,911.
Medicare Part D prescriptions
Fewer 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.
Fewer Part D prescriptions than 95% 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 lower Part D drug cost than 90% 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 lower Part D drug cost than 95% 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.
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 increased 19% from 829 in 2020 to 984 in 2024.
- 2020: 829
- 2021: 1,108
- 2022: 1,153
- 2023: 1,172
- 2024: 984
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Medicare-allowed amount
Medicare-allowed amount increased 53% from $92,701 in 2020 to $142,083 in 2024.
- 2020: $92,701
- 2021: $129,524
- 2022: $148,946
- 2023: $162,364
- 2024: $142,083
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Paid by Medicare
Paid by Medicare increased 57% from $68,002 in 2020 to $106,986 in 2024.
- 2020: $68,002
- 2021: $99,212
- 2022: $113,585
- 2023: $122,702
- 2024: $106,986
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 57% from 21 in 2020 to 33 in 2024.
- 2020: 21
- 2021: 89
- 2022: 73
- 2023: 49
- 2024: 33
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30-day fills
30-day fills increased 60% from 21 in 2020 to 34 in 2024.
- 2020: 21
- 2021: 91
- 2022: 75
- 2023: 51
- 2024: 34
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Part D drug cost
Part D drug cost went from $401 in 2020 to $609 in 2024.
- 2020: $401
- 2021: $2,335
- 2022: $1,624
- 2023: $973
- 2024: $609
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $783.27 in 2019 to $18.13 in 2025.
- 2019: $783.27
- 2020: $203.22
- 2021: $140.93
- 2024: $86.41
- 2025: $18.13
Sources: CMS Medicare Physician & Other Practitioners (2024), 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 ยท 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 โ December 31, 2025): fewer than 11 records totaling $18.13.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
TEPEZZA | General | $18.13 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 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 โ by Provider and Service data, 2017โ2024; 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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221 | 200 | $209.43 | $52.95 |
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92014
Established patient complete exam of visual system
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202 | 178 | $312.85 | $79.18 |
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92004
New patient complete exam of visual system
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77 | 77 | $387.73 | $98.82 |
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92081
Exam of visual field with limited testing
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76 | 74 | $60.11 | $16.81 |
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67810
Biopsy of eyelid
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56 | 47 | $366.93 | $67.83 |
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92014
Established patient complete exam of visual system
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45 | 41 | $322.40 | $79.76 |
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92002
New patient problem focused exam of visual system
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44 | 44 | $185.61 | $47.80 |
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68840
Probing of nasal tear duct
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39 | 39 | $747.31 | $159.43 |
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92012
Established patient problem focused exam of visual system
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38 | 36 | $214.08 | $53.04 |
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67904
Repair of tendon of upper eyelid
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31 | 31 | $4569.19 | $892.34 |
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67917
Extensive repair of turning-outward eyelid defect
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29 | 27 | $2620.10 | $490.17 |
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92081
Exam of visual field with limited testing
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27 | 27 | $59.11 | $16.81 |
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15823
Removal of excessive skin and fat of upper eyelid
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24 | 24 | $4644.33 | $849.90 |
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67840
Removal of growth of eyelid
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16 | 13 | $712.56 | $135.41 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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16 | 15 | $603.25 | $151.36 |
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15260
Full thickness skin graft to nose, ears, eyelids, or lips, 20.0 sq cm or less
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15 | 13 | $3658.80 | $854.11 |
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67924
Extensive repair of turning-inward eyelid defect
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15 | 12 | $1932.60 | $424.23 |
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92004
New patient complete exam of visual system
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13 | 13 | $397.92 | $98.74 |
Source: CMS Part B by Provider and Service, 2024; 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 |
|---|---|---|---|---|---|
| Erythromycin | Erythromycin Base | 21 | 165 | $436.46 | 19 |
| Neomycin-Polymyxin-Dexameth | Neomycin/Polymyxin B/Dexametha | 12 | 216 | $172.46 | โ |
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.
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.
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
I20111104000478
MA
8527119817
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
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
330 Brookline Ave, Boston, MA 022155400
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
116 N Beacon St, Brighton, MA 021352011
Phone: 6177835200
Beth Israel Deaconess Medical Center Inc
330 Brookline Ave, Boston, MA 022155400
Phone: 6176672000
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
330 Brookline Ave, Boston, MA 022155400
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
114 N Beacon St, Brighton, MA 021352011
Phone: 7819839088
Massachusetts Eye And Ear Associates, Inc
243 Charles St, Boston, MA 021143002
Phone: 6175237900
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychiatry & Neurology - Neurology
Otolaryngology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Otolaryngology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated May 07, 2007.
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. William Binotti, MD
- Dr. Gena Heidary, MD
- Elli Park
- Dr. Nazlee Zebardast, MD
- Dr. Enchi Chang, MD
- Dr. Jason Rothman, MD
Mailing Address
243 Charles St, 10th Floor Oculoplastics
Boston, MA 021143002
Phone: 6175735563