NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1053680900 MD
Verify on CMS → Roy Rajan, MD
Nephrology Physician in Keene, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,534 in Nephrology 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
730
Medicare Part D claims · 168 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
90.1/100
▲ 7 pts above national avg 83.1 · Exceptional
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
Roy Rajan, MD reported a CMS MIPS final score of 90.1/100 - above the 83.1 national average - and filed 730 Medicare Part D claims in 2023.
- 90.1/100
- MIPS score · +7 vs avg
- 730
- Part D claims, 2023
- 92%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Roy Rajan, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
90 Top 40% higher than 60% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Roy Rajan, MD sits
This provider among nephrology physician peers
Across the 2,476 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Roy Rajan, MD writes more Part D claims than 36% of them and scores higher on MIPS quality than 66% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one nephrology physician peer from a representative sample of 60; the gold marker is Roy Rajan, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Roy Rajan, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Roy Rajan, MD?
High performer (top quartile)Primary specialty
Nephrology Physician
Medicare Part D claims
730 50% vs specialty avg
MIPS final score
90.1/100 7 pts vs avg
Specialty distribution in New Hampshire
How Nephrology Physician compares to other specialties among New Hampshire providers
Medicare quality performance, MIPS
Roy Rajan, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 90.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Nephrology Physician) - 90.1/100 vs national avg 83.1
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).
Roy Rajan, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 590 COURT ST, Keene, NH, 03431, with a listed phone of (603) 354-5400. NPI 1053680900 was issued on 12/21/2011.
Medicare Part D records for calendar year 2023 show 730 prescription claims written by this provider, covering 168 Medicare beneficiaries and totaling roughly $55K in drug spend, split 8% brand-name and 92% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 90.1/100 for the 2023 performance year, compared with the national average of 83.1.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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 | 1053680900 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/21/2011 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
90.0519
Final Score
Avg: 83.1
50.173
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Roy Rajan, MD 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.
Mary Hitchcock Memorial Hospital
★★★☆☆ 3/5
Keene, NH
Acute Care Hospitals
CMS CCN: 300003
Dartmouth-Hitchcock Clinic
Lebanon, NH
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Generic-heavy
Roy Rajan, MD - brand share 8.0%
Nephrology Physician average
8% brand-name claims vs 92% generic, on 730 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.
730
Total Claims
$55K
Total Drug Cost
168
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,816
- Total Day Supply
- 54,135
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $34K
- Generic Drug Cost
- $21K
Patient Demographics
- Average Patient Age
- 74.4 years
- Avg HCC Risk Score
- 1.82
- Gender Split
- 40% female / 60% male
- Age Distribution
- <65: 14, 65-74: 67, 75-84: 72, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Roy Rajan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Losartan Potassium
Losartan Potassium
84 claims
- Chlorthalidone
Chlorthalidone
76 claims
- Lisinopril
Lisinopril
62 claims
- Amlodipine Besylate
Amlodipine Besylate
61 claims
- Hydrochlorothiazide
Hydrochlorothiazide
48 claims
- Spironolactone
Spironolactone
39 claims
- Allopurinol 31
Allopurinol
31 claims
- Calcitriol 29
Calcitriol
29 claims
| Drug | Claims |
|---|---|
| Losartan Potassium | 84 |
| Chlorthalidone | 76 |
| Lisinopril | 62 |
| Amlodipine Besylate | 61 |
| Hydrochlorothiazide | 48 |
| Spironolactone | 39 |
| Allopurinol | 31 |
| Calcitriol | 29 |
| Torsemide | 23 |
| Terazosin Hcl | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Roy Rajan, MD fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Roy Rajan, MD's 730 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Rajan.
Dr. Kulli Barrett
M.D.
Portsmouth, NH
Dr. Clay Block
M.D.
Lebanon, NH
Dr. Elizabeth Brant
M.D.
Lebanon, NH
Dr. Marilena Caldarusa
M.D.
Manchester, NH
Dr. Peter Cheung
M.D.
Manchester, NH
Compare Nephrology 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 New Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New Hampshire
Frequently Asked Questions
What is Roy Rajan, MD's specialty? ▼
Roy Rajan, MD specializes in Nephrology Physician and practices in Keene, New Hampshire. Credentials: MD.
How much does Roy Rajan, MD prescribe under Medicare Part D? ▼
In 2023, Roy Rajan, MD wrote 730 Medicare Part D claims totaling $55K in drug costs for 168 beneficiaries.
What is Roy Rajan, MD's Medicare quality score? ▼
Roy Rajan, MD has a CMS MIPS Final Score of 90.1/100, Cost: 50.2. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Roy Rajan, MD located? ▼
Roy Rajan, MD is located at 590 COURT ST, Keene, NH, 03431. Phone: (603) 354-5400.
What is Roy Rajan, MD's NPI number? ▼
Roy Rajan, MD's National Provider Identifier (NPI) is 1053680900, issued on 12/21/2011.
Does Roy Rajan, MD prescribe more brand-name or generic drugs? ▼
Roy Rajan, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $34K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Roy Rajan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Roy Rajan, MD's most frequently prescribed drugs include Losartan Potassium, Chlorthalidone, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Roy Rajan, MD accept Medicare? ▼
Roy Rajan, MD appears in CMS Medicare data with 730 Part D claims and 168 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Roy Rajan, MD's credentials? ▼
Roy Rajan, MD's NPI is 1053680900 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.