NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1548245038 MD
Verify on CMS → Robert Greenberg, MD
Internal Medicine Physician in Brockton, 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 172,737 in Internal Medicine 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
13
Medicare Part D claims · Internal Medicine Physician avg: 3K
MIPS score
89.4/100
▲ 6 pts above national avg 83.5 · Exceptional
What the federal data shows
Robert Greenberg, MD reported a CMS MIPS final score of 89.4/100 - above the 83.5 national average - and filed 13 Medicare Part D claims in 2023.
- 89.4/100
- MIPS score · +6 vs avg
- 13
- Part D claims, 2023
- 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.
Robert Greenberg, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
89 Top 44% higher than 56% of 454,083 measured providers
Each bar is a band; taller bars hold more measured providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Robert Greenberg, MD sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Robert Greenberg, MD writes more Part D claims than 1% of them and scores higher on MIPS quality than 55% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Robert Greenberg, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Robert Greenberg, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Robert Greenberg, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
13 100% vs specialty avg
MIPS final score
89.4/100 5.9 pts vs avg
Specialty distribution in Massachusetts
How Internal Medicine Physician compares to other specialties among Massachusetts providers
Medicare quality performance, MIPS
Robert Greenberg, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 89.4/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 89.4/100 vs national avg 83.5
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).
Robert Greenberg, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 110 LIBERTY ST, Brockton, MA, 02301, with a listed phone of (508) 894-0400. NPI 1548245038 was issued on 12/07/2005.
Medicare Part D records for calendar year 2023 show 13 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $1K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 89.4/100 for the 2023 performance year (Quality 75.4, Cost 72.7), compared with the 83.5 average among clinicians with a measured score.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1548245038 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/07/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.4311
Final Score
Measured-score avg: 83.5
75.4159
Quality
72.6876
Cost
100
Promoting Interoperability
Reporting: Group practice
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 Robert Greenberg, MD. To verify Robert Greenberg, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
13
Total Claims
$1K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 19
- Total Day Supply
- 533
Patient Demographics
- Average Patient Age
- 75.8 years
- Avg HCC Risk Score
- 1.23
Internal Medicine Physician Overview
How Robert Greenberg, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Robert Greenberg, MD's 13 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Greenberg.
Dr. Nawal Aamir
MD
Worcester, MA
Zainab Abbas
Worcester, MA
Dr. Nooshin Abbasi
MD MPH
Newton, MA
Dr. Lauren Abbate
MD
Boston, MA
Dr. Bassima Abdallah
MD
Boston, MA
Compare Internal Medicine 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 Internal Medicine 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.
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Frequently Asked Questions
What is Robert Greenberg, MD's specialty? ▼
Robert Greenberg, MD specializes in Internal Medicine Physician and practices in Brockton, Massachusetts. Credentials: MD.
How much does Robert Greenberg, MD prescribe under Medicare Part D? ▼
In 2023, Robert Greenberg, MD wrote 13 Medicare Part D claims totaling $1K in drug costs for N/A beneficiaries.
What is Robert Greenberg, MD's Medicare quality score? ▼
Robert Greenberg, MD has a CMS MIPS Final Score of 89.4/100 (Quality: 75.4, Cost: 72.7). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Robert Greenberg, MD located? ▼
Robert Greenberg, MD is located at 110 LIBERTY ST, Brockton, MA, 02301. Phone: (508) 894-0400.
What is Robert Greenberg, MD's NPI number? ▼
Robert Greenberg, MD's National Provider Identifier (NPI) is 1548245038, issued on 12/07/2005.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
Does Robert Greenberg, MD accept Medicare? ▼
Robert Greenberg, MD appears in CMS Medicare data with 13 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Greenberg, MD's credentials? ▼
Robert Greenberg, MD's NPI is 1548245038 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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
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.