NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1003873126 MD
Verify on CMS → Mitchell Rubenstein, MD
Dermatology Physician in Brookline, 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 14,645 in Dermatology 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
1K
Medicare Part D claims · 377 beneficiaries · Dermatology Physician avg: 729
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Mitchell Rubenstein, MD filed 1,115 Medicare Part D claims in 2023 as a Dermatology Physician in Brookline, Massachusetts, prescribing 88% generic.
- 1K
- Part D claims, 2023
- 88%
- generic prescribing
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.
Mitchell Rubenstein, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,115 Top 23% higher than 77% 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)
Mitchell Rubenstein, 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 Mitchell Rubenstein, MD?
Quality data not reportedPrimary specialty
Dermatology Physician
Medicare Part D claims
1,115 53% vs specialty avg
Specialty distribution in Massachusetts
How Dermatology 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 Dermatology 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).
Mitchell Rubenstein, MD appears in the CMS NPPES registry as a Dermatology Physician provider holding MD credentials at 111 CYPRESS ST, Brookline, MA, 02445, with a listed phone of (857) 307-0896. NPI 1003873126 was issued on 05/01/2006.
Medicare Part D records for calendar year 2023 show 1,115 prescription claims written by this provider, covering 377 Medicare beneficiaries and totaling roughly $245K in drug spend, split 12% brand-name and 88% generic by claim count.
Dermatology Physician is a mid-sized specialty nationwide, with 14,645 enrolled providers across 53 states and an average of 729 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 | 1003873126 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/01/2006 |
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 Mitchell Rubenstein, MD. To verify Mitchell Rubenstein, 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
Mitchell Rubenstein, MD - brand share 12.0%
Dermatology Physician average
12% brand-name claims vs 88% generic, on 1,115 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.
1,115
Total Claims
$245K
Total Drug Cost
377
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,326
- Total Day Supply
- 36,390
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $201K
- Generic Drug Cost
- $43K
- Antibiotic Claims
- 55
Patient Demographics
- Average Patient Age
- 75.3 years
- Avg HCC Risk Score
- 1.06
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 22, 65-74: 141, 75-84: 176, 85+: 38
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mitchell Rubenstein, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ketoconazole
Ketoconazole
142 claims
- Hydrocortisone
Hydrocortisone
94 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
83 claims
- Fluorouracil
Fluorouracil
72 claims
- Fluocinonide 55
Fluocinonide
55 claims
- Clobetasol Propion… 52
Clobetasol Propionate
52 claims
- Betamethasone Dipr… 44
Betamethasone Dipropionate
44 claims
- Betamethasone Dipr… 43
Betamethasone Diprop Augmented
43 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 142 |
| Hydrocortisone | 94 |
| Triamcinolone Acetonide | 83 |
| Fluorouracil | 72 |
| Fluocinonide | 55 |
| Clobetasol Propionate | 52 |
| Betamethasone Dipropionate | 44 |
| Betamethasone Diprop Augmented Betamethasone/Propylene Glyc | 43 |
| Halobetasol Propionate | 36 |
| Metronidazole | 36 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Mitchell Rubenstein, MD fits within the Dermatology Physician landscape nationally.
14,645
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider
Mitchell Rubenstein, MD's 1,115 claims are above the specialty average of 729.
Nearby Dermatology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Rubenstein.
Dr. Christopher Adams
M.D.
Boston, MA
Dr. David Aghassi
MD
Wellesley, MA
Dr. Abdul Ahmed
MD
Boston, MA
Dr. Abdullah Alajaji
MD
Boston, MA
Dr. Rhoda Alani
M.D.
Boston, MA
Compare Dermatology 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 Dermatology 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 Mitchell Rubenstein, MD's specialty? ▼
Mitchell Rubenstein, MD specializes in Dermatology Physician and practices in Brookline, Massachusetts. Credentials: MD.
How much does Mitchell Rubenstein, MD prescribe under Medicare Part D? ▼
In 2023, Mitchell Rubenstein, MD wrote 1,115 Medicare Part D claims totaling $245K in drug costs for 377 beneficiaries.
Where is Mitchell Rubenstein, MD located? ▼
Mitchell Rubenstein, MD is located at 111 CYPRESS ST, Brookline, MA, 02445. Phone: (857) 307-0896.
What is Mitchell Rubenstein, MD's NPI number? ▼
Mitchell Rubenstein, MD's National Provider Identifier (NPI) is 1003873126, issued on 05/01/2006.
Does Mitchell Rubenstein, MD prescribe more brand-name or generic drugs? ▼
Mitchell Rubenstein, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $201K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 14,645 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 729 Medicare Part D claims per year.
What drugs does Mitchell Rubenstein, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mitchell Rubenstein, MD's most frequently prescribed drugs include Ketoconazole, Hydrocortisone, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mitchell Rubenstein, MD accept Medicare? ▼
Mitchell Rubenstein, MD appears in CMS Medicare data with 1,115 Part D claims and 377 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mitchell Rubenstein, MD's credentials? ▼
Mitchell Rubenstein, MD's NPI is 1003873126 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.