NPI registry status
Active
2026 NPPES data Sleep Medicine (Psychiatry & Neurology) Physician NPI 1609825181 M.D.
Verify on CMS → Arun Rajan, M.D.
Sleep Medicine (Psychiatry & Neurology) Physician in Dartmouth, 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 389 in Sleep Medicine (Psychiatry & 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
4K
Medicare Part D claims · 404 beneficiaries · Sleep Medicine (Psychiatry & Neurology) Physician avg: 981
Industry payments
$299.53
14 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Arun Rajan, M.D. filed 3,632 Medicare Part D claims in 2024 as a Sleep Medicine (Psychiatry & Neurology) Physician in Dartmouth, Massachusetts.
- 4K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥90th
- 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 Arun Rajan, M.D.
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 1609825181), first enumerated 05/10/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,632 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$299.53 in reported industry payments (14 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Arun Rajan, M.D.'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.
Compare Rajan with other Sleep Medicine (Psychiatry & Neurology) Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Massachusetts
- Maamie Asamoah-Mensah Boston, MA
- Dr. Joshua August, MD Boston, MA
- Dr. Karim Awad, MD Boston, MA
- Dr. Kranti Kiran Bhagi, M.D. Springfield, MA
- Dr. Philip Burke, MD, MPH Brookline, MA
- Dr. Xi Chen, M.D., PH.D., Boston, MA
Other specialties in Dartmouth: Case Manager/Care Coordinator (33) · Family Nurse Practitioner (28) · Behavior Technician (28) · Physical Therapist (25)
CMS NPPES provider registry desk
NPI 1609825181 · Sleep Medicine (Psychiatry & Neurology) Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1609825181
- ENUM-LEGACY 2006
- TAX-TRACE 389
- RX-MID 3,632
- BOOK-THIN 14 in Massachusetts
- PHOTO-ENUM Baldev Rai, M.D. · 2006
Arun Rajan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,632 ≥ 90th percentile 90% 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 certification likely (heuristic, not verified)
Arun Rajan, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Arun Rajan, M.D.?
Quality data not reportedPrimary specialty
Sleep Medicine (Psychiatry & Neurology) Physician
Medicare Part D claims
3,632 270% vs specialty avg
Specialty distribution in Massachusetts
How Sleep Medicine (Psychiatry & 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 Sleep Medicine (Psychiatry & 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 | 1609825181 |
|---|---|
| Specialty | Sleep Medicine (Psychiatry & Neurology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/10/2006 |
Hospital and facility affiliations
Facilities where Arun Rajan, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Prime Medical Associates LLC
North Dartmouth, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Arun Rajan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$300
Largest payer
ABBVIE 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 Arun Rajan, M.D.. To verify Arun Rajan, M.D.'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.
3,632
Total Claims
$590K
Total Drug Cost
404
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,361.633
- Total Day Supply
- 156,661
- Generic Drug Cost
- $150K
Patient Demographics
- Average Patient Age
- 68.0 years
- Avg HCC Risk Score
- 1.56
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 133, 65-74: 138, 75-84: 102, 85+: 31
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Arun Rajan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Memantine Hcl
Memantine Hcl
327 claims
- Lamotrigine
Lamotrigine
268 claims
- Levetiracetam
Levetiracetam
217 claims
- Ropinirole Hcl
Ropinirole Hcl
192 claims
- Topiramate
Topiramate
189 claims
- Amitriptyline Hcl
Amitriptyline Hcl
159 claims
- Carbamazepine Er
Carbamazepine Er
154 claims
- Donepezil Hcl 130
Donepezil Hcl
130 claims
| Drug | Claims |
|---|---|
| Memantine Hcl | 327 |
| Lamotrigine | 268 |
| Levetiracetam | 217 |
| Ropinirole Hcl | 192 |
| Topiramate | 189 |
| Amitriptyline Hcl | 159 |
| Carbamazepine Er Carbamazepine | 154 |
| Donepezil Hcl | 130 |
| Gabapentin | 107 |
| Galantamine Er Galantamine Hbr | 101 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Sleep Medicine (Psychiatry & Neurology) Physician in MA →
All providers in Massachusetts →
Compare specialties →
Sleep Medicine (Psychiatry & Neurology) Physician Overview
How Arun Rajan, M.D. fits within the Sleep Medicine (Psychiatry & Neurology) Physician landscape nationally.
389
Sleep Medicine (Psychiatry & Neurology) Physician Providers in US
47
States with Sleep Medicine (Psychiatry & Neurology) Physician
981
Avg Claims per Provider
Arun Rajan, M.D.'s 3,632 claims are above the specialty average of 981.
Nationwide Sleep Medicine (Psychiatry & Neurology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Rajan, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Sleep Medicine (Psychiatry & Neurology) Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Rajan.
One of 14 Sleep Medicine (Psychiatry & Neurology) Physician providers enrolled in Massachusetts, 11 are shown on this page.
Frequently Asked Questions
What is Arun Rajan, M.D.'s specialty? ▼
Arun Rajan, M.D. specializes in Sleep Medicine (Psychiatry & Neurology) Physician and practices in Dartmouth, Massachusetts. Credentials: M.D..
How much does Arun Rajan, M.D. prescribe under Medicare Part D? ▼
In 2024, Arun Rajan, M.D. wrote 3,632 Medicare Part D claims totaling $590K in drug costs for 404 beneficiaries.
Where is Arun Rajan, M.D. located? ▼
Arun Rajan, M.D. is located at 237A STATE RD, Dartmouth, MA, 02747. Phone: (508) 993-9760.
What is Arun Rajan, M.D.'s NPI number? ▼
Arun Rajan, M.D.'s National Provider Identifier (NPI) is 1609825181, issued on 05/10/2006.
How many Sleep Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 389 Sleep Medicine (Psychiatry & Neurology) Physician providers across 47 states in the US. The average Sleep Medicine (Psychiatry & Neurology) Physician provider writes 981 Medicare Part D claims per year.
What drugs does Arun Rajan, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Arun Rajan, M.D.'s most frequently prescribed drugs include Memantine Hcl, Lamotrigine, Levetiracetam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Arun Rajan, M.D. accept Medicare? ▼
Arun Rajan, M.D. appears in CMS Medicare data with 3,632 Part D claims and 404 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Arun Rajan, M.D.'s credentials? ▼
Arun Rajan, M.D.'s NPI is 1609825181 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 (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.