NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1306833561 MD
Verify on CMS → Louis Caplan, MD
Neurology Physician in Boston, 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 20,467 in Neurology 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
228
Medicare Part D claims · 61 beneficiaries · Neurology Physician avg: 1K
What the federal data shows
Louis Caplan, MD filed 228 Medicare Part D claims in 2024 as a Neurology Physician in Boston, Massachusetts.
- 228
- Part D claims, 2024
- ≥48th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Louis Caplan, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1306833561), first enumerated 10/04/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 228 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Louis Caplan, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1306833561 · Neurology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1306833561
- ENUM-LEGACY 2005
- TAX-MID 20K Neurology Physician
- RX-LIGHT 228
- BOOK-LIGHT 910 in Massachusetts
- PHOTO-ENUM Patrick Matthiessen · 2005
Louis Caplan, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
228 ≥ 48th percentile 48% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Louis Caplan, 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 Louis Caplan, MD?
Quality data not reportedPrimary specialty
Neurology Physician
Medicare Part D claims
228 83% vs specialty avg
Specialty distribution in Massachusetts
How Neurology 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 Neurology 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).
Practice Address
Provider Details
| NPI | 1306833561 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/04/2005 |
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 Louis Caplan, MD. To verify Louis Caplan, 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 2024.
228
Total Claims
$25K
Total Drug Cost
61
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 506.7
- Total Day Supply
- 14,934
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.76
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Louis Caplan, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Cilostazol
Cilostazol
33 claims
- Butalbital-Acetami…
Butalbital-Acetaminophen-Caffe
24 claims
- Carbidopa-Levodopa
Carbidopa-Levodopa
18 claims
- Clonazepam 11
Clonazepam
11 claims
- Levetiracetam 11
Levetiracetam
11 claims
| Drug | Claims |
|---|---|
| Cilostazol | 33 |
| Butalbital-Acetaminophen-Caffe Butalb/Acetaminophen/Caffeine | 24 |
| Carbidopa-Levodopa Carbidopa/Levodopa | 18 |
| Clonazepam | 11 |
| Levetiracetam | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Louis Caplan, MD fits within the Neurology Physician landscape nationally.
20,467
Neurology Physician Providers in US
54
States with Neurology Physician
1,356
Avg Claims per Provider
Louis Caplan, MD's 228 claims are below the specialty average of 1,356.
Nationwide Neurology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Caplan, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Neurology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Caplan.
One of 910 Neurology Physician providers enrolled in Massachusetts, 5 are shown here.
Bardia Abbasi
Boston, MA
Dr. Shabbir Abbasi
M.D.
Leominster, MA
Dr. Lobna Abdelwahab
MD
Fall River, MA
Dr. Widad Abou Chaar
MD
Boston, MA
Dr. Mahmoud Abu-Ata
M.D.
Boston, MA
Compare Neurology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Louis Caplan, MD's specialty? ▼
Louis Caplan, MD specializes in Neurology Physician and practices in Boston, Massachusetts. Credentials: MD.
How much does Louis Caplan, MD prescribe under Medicare Part D? ▼
In 2024, Louis Caplan, MD wrote 228 Medicare Part D claims totaling $25K in drug costs for 61 beneficiaries.
Where is Louis Caplan, MD located? ▼
Louis Caplan, MD is located at 330 BROOKLINE AVE, Boston, MA, 02215. Phone: (617) 632-8911.
What is Louis Caplan, MD's NPI number? ▼
Louis Caplan, MD's National Provider Identifier (NPI) is 1306833561, issued on 10/04/2005.
How many Neurology Physician providers are there in the US? ▼
There are 20,467 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,356 Medicare Part D claims per year.
What drugs does Louis Caplan, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Louis Caplan, MD's most frequently prescribed drugs include Cilostazol, Butalbital-Acetaminophen-Caffe, Carbidopa-Levodopa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Louis Caplan, MD accept Medicare? ▼
Louis Caplan, MD appears in CMS Medicare data with 228 Part D claims and 61 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Louis Caplan, MD's credentials? ▼
Louis Caplan, MD's NPI is 1306833561 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.