NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1275530420 M.D.
Verify on CMS → Neil Alperin, M.D.
Rheumatology Physician in Warren, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,200 in Rheumatology 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
70
Medicare Part D claims · 39 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
73%
generic claims · 27% 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
Neil Alperin, M.D. filed 70 Medicare Part D claims in 2023 as a Rheumatology Physician in Warren, Michigan, prescribing 73% generic.
- 70
- Part D claims, 2023
- 73%
- 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.
Neil Alperin, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
70 0th percentile higher than 0% 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 Alperin, M.D. 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 Alperin, M.D.?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
70 97% vs specialty avg
Specialty distribution in Michigan
How Rheumatology Physician compares to other specialties among Michigan 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 Rheumatology 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 Alperin, M.D. appears in the CMS NPPES registry as a Rheumatology Physician provider holding M.D. credentials at 11900 E 12 MILE RD, Warren, MI, 48093, with a listed phone of (586) 751-2072. NPI 1275530420 was issued on 07/02/2005.
Medicare Part D records for calendar year 2023 show 70 prescription claims written by this provider, covering 39 Medicare beneficiaries and totaling roughly $116K in drug spend, split 27% brand-name and 73% generic by claim count.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,200 enrolled providers across 52 states and an average of 2,054 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 | 1275530420 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/02/2005 |
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Neil Alperin, M.D.. To verify Neil Alperin, M.D.'s current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Neil Alperin, M.D. - brand share 27.0%
Rheumatology Physician average
27% brand-name claims vs 73% generic, on 70 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.
70
Total Claims
$116K
Total Drug Cost
39
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 143
- Total Day Supply
- 4,223
- Brand vs Generic
- 27% brand / 73% generic
- Brand Drug Cost
- $113K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 71.8 years
- Avg HCC Risk Score
- 1.80
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Neil Alperin, M.D. fits within the Rheumatology Physician landscape nationally.
6,200
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Neil Alperin, M.D.'s 70 claims are below the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Alperin.
Dr. Brandon Ahlgren
MD
Detroit, MI
Khashayar Ahmadmehrabi
Ann Arbor, MI
Dr. Fadi Ajine
MD
Kalamazoo, MI
Dr. Imad Alazem
M.D.
Dearborn, MI
Dr. Blesset Alexander
M.D.
Detroit, MI
Compare Rheumatology 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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Rheumatology 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 Neil Alperin, M.D.'s specialty? ▼
Neil Alperin, M.D. specializes in Rheumatology Physician and practices in Warren, Michigan. Credentials: M.D..
How much does Neil Alperin, M.D. prescribe under Medicare Part D? ▼
In 2023, Neil Alperin, M.D. wrote 70 Medicare Part D claims totaling $116K in drug costs for 39 beneficiaries.
Where is Neil Alperin, M.D. located? ▼
Neil Alperin, M.D. is located at 11900 E 12 MILE RD, Warren, MI, 48093. Phone: (586) 751-2072.
What is Neil Alperin, M.D.'s NPI number? ▼
Neil Alperin, M.D.'s National Provider Identifier (NPI) is 1275530420, issued on 07/02/2005.
Does Neil Alperin, M.D. prescribe more brand-name or generic drugs? ▼
Neil Alperin, M.D.'s prescribing is 27% brand-name and 73% generic drugs by claim count, with $113K in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,200 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Neil Alperin, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Neil Alperin, M.D.'s most frequently prescribed drugs include Methotrexate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Neil Alperin, M.D. accept Medicare? ▼
Neil Alperin, M.D. appears in CMS Medicare data with 70 Part D claims and 39 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Neil Alperin, M.D.'s credentials? ▼
Neil Alperin, M.D.'s NPI is 1275530420 with credentials M.D.. 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.