2026 NPPES data Hematology (Internal Medicine) Physician NPI 1043308570 MD
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ARTHUR RABINOWITZ, MD

Hematology (Internal Medicine) Physician in BURLINGTON, Massachusetts. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
59
Medicare Part D claims · 30 beneficiaries · Hematology (Internal Medicine) Physician avg: 693
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.4157/100
▲ 8 pts above national avg 83.1 · [object Object]
What the federal data reveals: ARTHUR RABINOWITZ, MD is a Hematology (Internal Medicine) Physician ([object Object]) practicing in BURLINGTON, Massachusetts with a Medicare Part D prescribing footprint of 59 claims across 30 beneficiaries — 24% brand-name prescribing . Their CMS MIPS Final Score of 91.4157/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: ARTHUR RABINOWITZ, MD reported a CMS MIPS final score of 91.4157 out of 100, above the 83.1 national average, and filed 59 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ARTHUR RABINOWITZ, 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).

ARTHUR RABINOWITZ, MD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 10/10/2006

NPI 1043308570

Primary specialty

Hematology (Internal Medicine) Physician

Niche

1,436 US NPIs in this specialty

Medicare Part D claims

59 91% vs specialty avg

2023 prescription claims

Specialty avg: 693

MIPS final score

91.4157/100 8.315700000000007% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Massachusetts

How Hematology (Internal Medicine) Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Hematology (Internal Medicine) Physician share within Massachusetts

1. Hematology (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hematology (Internal Medicine) Physician share within Massachusetts

Medicare quality performance — MIPS

ARTHUR RABINOWITZ, MD's 2023 MIPS final score plotted against the Hematology (Internal Medicine) Physician national average

High performer (top quartile)
MIPS Final Score
91.4157/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Hematology (Internal Medicine) Physician) — 91.4157/100 vs national avg 83.1

0%100%National avg83%91.4%
MIPS final score (Hematology (Internal Medicine) Physician) — 91.4157/100 vs national avg 83.1

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).

ARTHUR RABINOWITZ, MD is a Hematology (Internal Medicine) Physician provider practicing in BURLINGTON, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1043308570. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ARTHUR RABINOWITZ, MD appears in the CMS NPPES registry as a Hematology (Internal Medicine) Physician provider holding MD credentials at LAHEY CLINIC, BURLINGTON, MA, 01805, with a listed phone of (781) 744-8400. NPI 1043308570 was issued on 10/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what RABINOWITZ most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 59 prescription claims written by this provider, covering 30 Medicare beneficiaries and totaling roughly $192K in drug spend, split 24% brand-name and 76% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.4157/100 for the 2023 performance year (Quality 76.877), compared with the national average of 83.1.

Hematology (Internal Medicine) Physician is a narrow specialty nationwide, with 1,436 enrolled providers across 50 states and an average of 693 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

LAHEY CLINIC
BURLINGTON, MA 01805

Provider Details

NPI 1043308570
Specialty Hematology (Internal Medicine) Physician
Credentials MD
Gender Male
NPI Issued 10/10/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.4157
Final Score
Avg: 83.1
76.877
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

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 ARTHUR RABINOWITZ, MD. To verify ARTHUR RABINOWITZ, 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

ARTHUR RABINOWITZ, MD — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 59 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.

59
Total Claims
$192K
Total Drug Cost
30
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
92
Total Day Supply
2,337
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$162K
Generic Drug Cost
$29K

Patient Demographics

Average Patient Age
76.7 years
Avg HCC Risk Score
2.26
Gender Split
60% female / 40% male

Hematology (Internal Medicine) Physician Overview

How ARTHUR RABINOWITZ, MD fits within the Hematology (Internal Medicine) Physician landscape nationally.

1,436
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
693
Avg Claims per Provider

ARTHUR RABINOWITZ, MD's 59 claims are below the specialty average of 693.

Nearby Hematology (Internal Medicine) Physician Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as RABINOWITZ.

Compare Hematology (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ARTHUR RABINOWITZ, MD's specialty?
ARTHUR RABINOWITZ, MD specializes in Hematology (Internal Medicine) Physician and practices in BURLINGTON, Massachusetts. Credentials: MD.
How much does ARTHUR RABINOWITZ, MD prescribe under Medicare Part D?
In 2023, ARTHUR RABINOWITZ, MD wrote 59 Medicare Part D claims totaling $192K in drug costs for 30 beneficiaries.
What is ARTHUR RABINOWITZ, MD's Medicare quality score?
ARTHUR RABINOWITZ, MD has a CMS MIPS Final Score of 91.4157/100 (Quality: 76.877). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ARTHUR RABINOWITZ, MD located?
ARTHUR RABINOWITZ, MD is located at LAHEY CLINIC, BURLINGTON, MA, 01805. Phone: (781) 744-8400.
What is ARTHUR RABINOWITZ, MD's NPI number?
ARTHUR RABINOWITZ, MD's National Provider Identifier (NPI) is 1043308570, issued on 10/10/2006.
Does ARTHUR RABINOWITZ, MD prescribe more brand-name or generic drugs?
ARTHUR RABINOWITZ, MD's prescribing is 24% brand-name and 76% generic drugs by claim count, with $162K in brand drug costs.
How many Hematology (Internal Medicine) Physician providers are there in the US?
There are 1,436 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 693 Medicare Part D claims per year.
Does ARTHUR RABINOWITZ, MD accept Medicare?
ARTHUR RABINOWITZ, MD appears in CMS Medicare data with 59 Part D claims and 30 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ARTHUR RABINOWITZ, MD's credentials?
ARTHUR RABINOWITZ, MD's NPI is 1043308570 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

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