NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1659378628 MD
Verify on CMS → Neil Birnbaum, MD
Internal Medicine Physician in Norwood, 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
7K
Medicare Part D claims · 746 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$27.15
1 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
Neil Birnbaum, MD filed 7,383 Medicare Part D claims in 2023 as a Internal Medicine Physician in Norwood, Massachusetts, prescribing 91% generic.
- 7K
- Part D claims, 2023
- 91%
- generic prescribing
- $27.15
- industry payments (Sunshine Act)
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.
Neil Birnbaum, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
7,383 Top 3% higher than 97% 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-eligible specialty (heuristic, not verified)
Neil Birnbaum, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Neil Birnbaum, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
7,383 172% vs specialty avg
Specialty distribution in Massachusetts
How Internal Medicine 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 Internal Medicine 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).
Neil Birnbaum, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 1177 BOSTON PROVIDENCE TPKE, Norwood, MA, 02062, with a listed phone of (781) 278-5540. NPI 1659378628 was issued on 07/05/2005.
Medicare Part D records for calendar year 2023 show 7,383 prescription claims written by this provider, covering 746 Medicare beneficiaries and totaling roughly $559K in drug spend, split 8% brand-name and 91% generic by claim count, with an opioid prescribing rate of 1.7%.
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 | 1659378628 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/05/2005 |
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 Neil Birnbaum, MD. Source: openpaymentsdata.cms.gov.
Total received
$27
Largest payer
RECORDATI_RARE_DISEASES_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 Neil Birnbaum, MD. To verify Neil Birnbaum, 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 · Generic-heavy
Neil Birnbaum, MD - brand share 8.0%
Internal Medicine Physician average
8% brand-name claims vs 91% generic, on 7,383 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.
7,383
Total Claims
$559K
Total Drug Cost
746
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 18,551
- Total Day Supply
- 545,505
- Brand vs Generic
- 8% brand / 91% generic
- Brand Drug Cost
- $359K
- Generic Drug Cost
- $198K
- Opioid Claims
- 126 (1.7% rate)
- Antibiotic Claims
- 96
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 0.99
- Gender Split
- 35% female / 65% male
- Age Distribution
- <65: 33, 65-74: 433, 75-84: 220, 85+: 60
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Neil Birnbaum, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
1,020 claims
- Simvastatin
Simvastatin
435 claims
- Amlodipine Besylate 348
Amlodipine Besylate
348 claims
- Rosuvastatin Calcium 325
Rosuvastatin Calcium
325 claims
- Omeprazole 269
Omeprazole
269 claims
- Losartan Potassium 268
Losartan Potassium
268 claims
- Lisinopril 267
Lisinopril
267 claims
- Levothyroxine Sodium 258
Levothyroxine Sodium
258 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 1,020 |
| Simvastatin | 435 |
| Amlodipine Besylate | 348 |
| Rosuvastatin Calcium | 325 |
| Omeprazole | 269 |
| Losartan Potassium | 268 |
| Lisinopril | 267 |
| Levothyroxine Sodium | 258 |
| Metformin Hcl | 177 |
| Metoprolol Succinate | 162 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Neil Birnbaum, 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
Neil Birnbaum, MD's 7,383 claims are above 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 Birnbaum.
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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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Neil Birnbaum, MD's specialty? ▼
Neil Birnbaum, MD specializes in Internal Medicine Physician and practices in Norwood, Massachusetts. Credentials: MD.
How much does Neil Birnbaum, MD prescribe under Medicare Part D? ▼
In 2023, Neil Birnbaum, MD wrote 7,383 Medicare Part D claims totaling $559K in drug costs for 746 beneficiaries.
Where is Neil Birnbaum, MD located? ▼
Neil Birnbaum, MD is located at 1177 BOSTON PROVIDENCE TPKE, Norwood, MA, 02062. Phone: (781) 278-5540.
What is Neil Birnbaum, MD's NPI number? ▼
Neil Birnbaum, MD's National Provider Identifier (NPI) is 1659378628, issued on 07/05/2005.
Does Neil Birnbaum, MD prescribe more brand-name or generic drugs? ▼
Neil Birnbaum, MD's prescribing is 8% brand-name and 91% generic drugs by claim count, with $359K in brand drug costs.
Does Neil Birnbaum, MD prescribe opioids? ▼
Yes, Neil Birnbaum, MD had 126 opioid claims in 2023 with an opioid prescribing rate of 1.7%.
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.
What drugs does Neil Birnbaum, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Neil Birnbaum, MD's most frequently prescribed drugs include Atorvastatin Calcium, Simvastatin, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Neil Birnbaum, MD accept Medicare? ▼
Neil Birnbaum, MD appears in CMS Medicare data with 7,383 Part D claims and 746 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Neil Birnbaum, MD's credentials? ▼
Neil Birnbaum, MD's NPI is 1659378628 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.