NPI registry status
Active
2026 NPPES data Surgery Physician NPI 1487630935 MD
Verify on CMS → John Najjar, MD
Surgery Physician in Worcester, 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 36,199 in Surgery 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
676
Medicare Part D claims · 180 beneficiaries · Surgery Physician avg: 169
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
24 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
John Najjar, MD filed 676 Medicare Part D claims in 2023 as a Surgery Physician in Worcester, Massachusetts, prescribing 83% generic.
- 676
- Part D claims, 2023
- 83%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
John Najjar, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
676 Top 31% higher than 69% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
John Najjar, MD 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 John Najjar, MD?
Quality data not reportedPrimary specialty
Surgery Physician
Medicare Part D claims
676 300% vs specialty avg
Specialty distribution in Massachusetts
How Surgery 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 Surgery 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).
John Najjar, MD appears in the CMS NPPES registry as a Surgery Physician provider holding MD credentials at 123 SUMMER ST, Worcester, MA, 01608, with a listed phone of (508) 368-3190. NPI 1487630935 was issued on 12/16/2005.
Medicare Part D records for calendar year 2023 show 676 prescription claims written by this provider, covering 180 Medicare beneficiaries and totaling roughly $120K in drug spend, split 17% brand-name and 83% generic by claim count, with an opioid prescribing rate of 4.9%.
Surgery Physician is a mid-sized specialty nationwide, with 36,199 enrolled providers across 56 states and an average of 169 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1487630935 |
|---|---|
| Specialty | Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/16/2005 |
Hospital and facility affiliations
Facilities where John Najjar, MD 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.
Reliant Medical Group Inc
Worcester, 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).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for John Najjar, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.1K
Largest payer
Medtronic, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
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 John Najjar, MD. To verify John Najjar, MD'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 · Typical
John Najjar, MD - brand share 17.0%
Surgery Physician average
17% brand-name claims vs 83% generic, on 676 2023 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 2023.
676
Total Claims
$120K
Total Drug Cost
180
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,283
- Total Day Supply
- 36,242
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $106K
- Generic Drug Cost
- $15K
- Opioid Claims
- 33 (4.9% rate)
- Antibiotic Claims
- 44
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 2.13
- Gender Split
- 43% female / 57% male
- Age Distribution
- <65: 22, 65-74: 85, 75-84: 54, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Najjar, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clopidogrel
Clopidogrel
223 claims
- Cilostazol
Cilostazol
157 claims
- Eliquis 73
Eliquis
73 claims
- Oxycodone-Acetamin… 25
Oxycodone-Acetaminophen
25 claims
- Xarelto 25
Xarelto
25 claims
- Gabapentin 20
Gabapentin
20 claims
- Pantoprazole Sodium 20
Pantoprazole Sodium
20 claims
- Amoxicillin-Clavul… 15
Amoxicillin-Clavulanate Potass
15 claims
| Drug | Claims |
|---|---|
| Clopidogrel Clopidogrel Bisulfate | 223 |
| Cilostazol | 157 |
| Eliquis Apixaban | 73 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 25 |
| Xarelto Rivaroxaban | 25 |
| Gabapentin | 20 |
| Pantoprazole Sodium | 20 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 15 |
| Santyl Collagenase Clostridium Hist. | 13 |
| Nifedipine Er Nifedipine | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgery Physician Overview
How John Najjar, MD fits within the Surgery Physician landscape nationally.
36,199
Surgery Physician Providers in US
56
States with Surgery Physician
169
Avg Claims per Provider
John Najjar, MD's 676 claims are above the specialty average of 169.
Nearby Surgery Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Najjar.
Dr. Jeffrey Aalberg
MD, MPH
Boston, MA
Dr. Daniele Abela
MD
Boston, MA
Ahmad Aboalfaraj
Boston, MA
Dr. Ibrahim Abushoshah
M.D.
Boston, MA
Dr. Ravindra Acharya
MD
Charlton, MA
Compare Surgery Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Surgery Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Massachusetts
Frequently Asked Questions
What is John Najjar, MD's specialty? ▼
John Najjar, MD specializes in Surgery Physician and practices in Worcester, Massachusetts. Credentials: MD.
How much does John Najjar, MD prescribe under Medicare Part D? ▼
In 2023, John Najjar, MD wrote 676 Medicare Part D claims totaling $120K in drug costs for 180 beneficiaries.
Where is John Najjar, MD located? ▼
John Najjar, MD is located at 123 SUMMER ST, Worcester, MA, 01608. Phone: (508) 368-3190.
What is John Najjar, MD's NPI number? ▼
John Najjar, MD's National Provider Identifier (NPI) is 1487630935, issued on 12/16/2005.
Does John Najjar, MD prescribe more brand-name or generic drugs? ▼
John Najjar, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $106K in brand drug costs.
Does John Najjar, MD prescribe opioids? ▼
Yes, John Najjar, MD had 33 opioid claims in 2023 with an opioid prescribing rate of 4.9%.
How many Surgery Physician providers are there in the US? ▼
There are 36,199 Surgery Physician providers across 56 states in the US. The average Surgery Physician provider writes 169 Medicare Part D claims per year.
What drugs does John Najjar, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, John Najjar, MD's most frequently prescribed drugs include Clopidogrel, Cilostazol, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Najjar, MD accept Medicare? ▼
John Najjar, MD appears in CMS Medicare data with 676 Part D claims and 180 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Najjar, MD's credentials? ▼
John Najjar, MD's NPI is 1487630935 with credentials MD. 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 (2023). 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.