Mark Jeffrey Phillips
Ophthalmology β’ Boston, MA
243 Charles St
Boston, MA 021143096
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 February 25, 2021; this date does not establish years in practice.
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Published CMS data list 181 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost β 52 prescription fills, including refills.
- Prednisolone Acetate β 31 prescription fills, including refills.
- Erythromycin (Erythromycin Base) β 25 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 7 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 65% 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 75% 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 β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 108 in 2023 to 181 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023β2024.
Practice Location & Contact Primary Location
243 Charles St
Boston, MA 021143096
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Boston, MA; Los Angeles, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
239 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
$5,119 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 β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $519.77 across 6 records.
By nature of payment
- Food and Beverage: $519.77 across 6 records.
Reporting-company totals (3 largest of 4)
- Glaukos Corporation: $195.55 across 1 record.
- Alcon Vision LLC: $148.93 across 1 record.
- Johnson & Johnson Surgical Vision, Inc.: $132.82 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).
NPI first issued
2021
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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, βDoes your provider accept Medicare as full payment?β
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)
Mark Phillips 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 Mark Phillips 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
Fewer Part D prescriptions than 65% 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 75% 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 65% 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 80% 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 D prescriptions
Medicare Part D prescriptions increased 68% from 108 in 2023 to 181 in 2024.
- 2023: 108
- 2024: 181
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30-day fills
30-day fills increased 53% from 156 in 2023 to 239 in 2024.
- 2023: 156
- 2024: 239
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Part D drug cost
Part D drug cost decreased 15% from $6,053 in 2023 to $5,119 in 2024.
- 2023: $6,053
- 2024: $5,119
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $269.09 in 2022 to $519.77 in 2025.
- 2022: $269.09
- 2023: $886.16
- 2024: $629.21
- 2025: $519.77
Sources: 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 Β· 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 β December 31, 2025): fewer than 11 records totaling $519.77.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Glaukos Corporation |
Food and Beverage
Cash or cash equivalent
|
iStent infinite | General | $195.55 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
|
Clareon | General | $148.93 |
| Johnson & Johnson Surgical Vision, Inc. |
Food and Beverage
In-kind items and services
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Tecnis IOL | General | $102.94 |
| Johnson & Johnson Surgical Vision, Inc. |
Food and Beverage
In-kind items and services
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Tecnis Simplicity | General | $29.88 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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OZURDEX | General | $22.19 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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OZURDEX | General | $20.28 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 | 52 | 1,836 | $249.78 | 15 |
| Prednisolone Acetate | Prednisolone Acetate | 31 | 1,193 | $1,053.36 | 22 |
| Erythromycin | Erythromycin Base | 25 | 257 | $245.81 | 18 |
| Ofloxacin | Ofloxacin | 23 | 625 | $199.02 | 19 |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 20 | 529 | $132.86 | 14 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 18 | 1,110 | $220.69 | 11 |
| Brimonidine Tartrate | Brimonidine Tartrate | 12 | 649 | $3,017.63 | β |
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
Self-certified to NPPES: 2026-07-06NUCC 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: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20250515002497
MA
9234597949
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
1100 N State St, Clinic Tower, Suite A4d
Los Angeles, CA 900335000
Phone: 3234095227
300 Longwood Ave
Boston, MA 021155724
Phone: 6173556000
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
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Neurology
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 243 CHARLES ST, BOSTON, MA 021143096 (Tel: 6175733412)
Registered at 243 CHARLES ST, BOSTON, MA 021143096 (Tel: 6175733412)
Registered at 300 LONGWOOD AVE, BOSTON, MA 021155724 (Tel: 6173556000)
Registered at 300 LONGWOOD AVE, BOSTON, MA 021155724 (Tel: 6173556000)
NPI status registered as active in NPPES database
Registered at 1100 N STATE ST, CLINIC TOWER, SUITE A4D, LOS ANGELES, CA 900335000 (Tel: 3234095227)
Registered at 1100 N STATE ST, CLINIC TOWER, SUITE A4D, LOS ANGELES, CA 900335000
Recorded as MARK PHILLIPS
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Boston
- Dr. Isdin Oke, MD
- Elli Park
- Varsha Pramil
- Dr. Leo Kim, MD, PhD
- Dr. Nurhan Torun, MD
- Dr. Nicole Benitah, MD
Mailing Address
243 Charles St
Boston, MA 021143096
Phone: 6175733412