NPI registry status
Active
2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1427491000 MD, PHD
Verify on CMS → James Stefater, MD, PHD
Retina Specialist (Ophthalmology) Physician in East Weymouth, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 983 in Retina Specialist (Ophthalmology) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
319
Medicare Part D claims · 112 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 593
Generic prescribing
59%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
James Stefater, MD, PHD filed 319 Medicare Part D claims in 2024 as a Retina Specialist (Ophthalmology) Physician in East Weymouth, Massachusetts, prescribing 59% generic.
- 319
- Part D claims, 2024
- 59%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥56th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about James Stefater, MD, PHD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1427491000), first enumerated 04/12/2013.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 319 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not James Stefater, MD, PHD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1427491000 · Retina Specialist (Ophthalmology) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1427491000
- ENUM-MID 2013
- TAX-NARROW 983
- RX-LIGHT 319
- BOOK-THIN 36 in Massachusetts
- PHOTO-ENUM David Almeida, MD, M… · 2013
James Stefater, MD, PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
319 ≥ 56th percentile 56% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
James Stefater, MD, PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about James Stefater, MD, PHD?
Quality data not reportedPrimary specialty
Retina Specialist (Ophthalmology) Physician
Medicare Part D claims
319 46% vs specialty avg
Specialty distribution in Massachusetts
How Retina Specialist (Ophthalmology) Physician compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Retina Specialist (Ophthalmology) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1427491000 |
|---|---|
| Specialty | Retina Specialist (Ophthalmology) Physician |
| Credentials | MD, PHD |
| Gender | Male |
| NPI Issued | 04/12/2013 |
Hospital and facility affiliations
Facilities where James Stefater, MD, PHD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Ophthalmic Consultants OF Boston Inc
Sandwich, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to James Stefater, MD, PHD. To verify James Stefater, MD, PHD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
James Stefater, MD, PHD - brand share 41.0%
Retina Specialist (Ophthalmology) Physician average
41% brand-name claims vs 59% generic, on 319 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
319
Total Claims
$14K
Total Drug Cost
112
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 453.6
- Total Day Supply
- 11,634
- Brand vs Generic
- 41% brand / 59% generic
- Brand Drug Cost
- $10K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 77.1 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 60% female / 40% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What James Stefater, MD, PHD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Prednisolone Acetate
Prednisolone Acetate
98 claims
- Ofloxacin
Ofloxacin
63 claims
- Brimonidine Tartrate 26
Brimonidine Tartrate
26 claims
- Ketorolac Trometha… 26
Ketorolac Tromethamine
26 claims
- Latanoprost 25
Latanoprost
25 claims
- Timolol Maleate 22
Timolol Maleate
22 claims
- Erythromycin 16
Erythromycin
16 claims
| Drug | Claims |
|---|---|
| Prednisolone Acetate | 98 |
| Ofloxacin | 63 |
| Brimonidine Tartrate | 26 |
| Ketorolac Tromethamine | 26 |
| Latanoprost | 25 |
| Timolol Maleate | 22 |
| Erythromycin Erythromycin Base | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Retina Specialist (Ophthalmology) Physician in MA →
All providers in Massachusetts →
Compare specialties →
Retina Specialist (Ophthalmology) Physician Overview
How James Stefater, MD, PHD fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.
983
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
593
Avg Claims per Provider
James Stefater, MD, PHD's 319 claims are below the specialty average of 593.
Nationwide Retina Specialist (Ophthalmology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Stefater, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Retina Specialist (Ophthalmology) Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Stefater.
One of 36 Retina Specialist (Ophthalmology) Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Omar Abdelal
MD
Boston, MA
Dr. Brian Ballios
MD, PHD
Boston, MA
Dr. Fina Barouch
MD
Peabody, MA
Dr. Mark Barsamian
DO
Hopedale, MA
Dr. Lauren Bierman
M.D.
Boston, MA
Compare Retina Specialist (Ophthalmology) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is James Stefater, MD, PHD's specialty? ▼
James Stefater, MD, PHD specializes in Retina Specialist (Ophthalmology) Physician and practices in East Weymouth, Massachusetts. Credentials: MD, PHD.
How much does James Stefater, MD, PHD prescribe under Medicare Part D? ▼
In 2024, James Stefater, MD, PHD wrote 319 Medicare Part D claims totaling $14K in drug costs for 112 beneficiaries.
Where is James Stefater, MD, PHD located? ▼
James Stefater, MD, PHD is located at 97 LIBBEY INDUSTRIAL PKWY STE 100, East Weymouth, MA, 02189. Phone: (781) 331-3300.
What is James Stefater, MD, PHD's NPI number? ▼
James Stefater, MD, PHD's National Provider Identifier (NPI) is 1427491000, issued on 04/12/2013.
Does James Stefater, MD, PHD prescribe more brand-name or generic drugs? ▼
James Stefater, MD, PHD's prescribing is 41% brand-name and 59% generic drugs by claim count, with $10K in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US? ▼
There are 983 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 593 Medicare Part D claims per year.
What drugs does James Stefater, MD, PHD prescribe most often? ▼
Based on 2024 Medicare Part D data, James Stefater, MD, PHD's most frequently prescribed drugs include Prednisolone Acetate, Ofloxacin, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Stefater, MD, PHD accept Medicare? ▼
James Stefater, MD, PHD appears in CMS Medicare data with 319 Part D claims and 112 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Stefater, MD, PHD's credentials? ▼
James Stefater, MD, PHD's NPI is 1427491000 with credentials MD, PHD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.