Mark Phillips
NPI 1235723669 · Ophthalmology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Phillips is a Ophthalmology Physician provider in Boston, MA (NPI 1235723669).
Provider details
- NPI number
- 1235723669
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 52 | 15 |
| Prednisolone Acetate | 31 | 22 |
| Erythromycin Basebrand: Erythromycin | 25 | 18 |
| Ofloxacin | 23 | 19 |
| Ketorolac Tromethamine | 20 | 14 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 18 | 11 |
| Brimonidine Tartrate | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$533 across 11 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1100 N State StClinic Tower, Suite A4dLos Angeles, CA 90033-5000Phone: (323) 409-5227
Registry dates
- Enumerated
- 2021-02-25
- Last updated
- 2025-05-11
- Certified
- 2025-05-11
Frequently asked questions
- What is Mark Phillips's NPI number?
- Mark Phillips's National Provider Identifier (NPI) is 1235723669, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Phillips's specialty?
- Mark Phillips is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Phillips located?
- Mark Phillips's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Mark Phillips's phone number?
- The practice phone number listed in the NPPES registry for Mark Phillips is (617) 355-6000.
- Does Mark Phillips accept Medicare?
- Mark Phillips is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Phillips's NPI active?
- Yes — Mark Phillips's NPI (1235723669) is active in the NPPES registry as of the last update on 2025-05-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.