2026 NPPES data Nephrology Physician NPI 1467496505 M.D.
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ATUL ROY, M.D.

Nephrology Physician in MERCED, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
3K
Medicare Part D claims · 403 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$369.04
15 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ATUL ROY, M.D. filed 2,504 Medicare Part D claims in 2023 as a Nephrology Physician in MERCED, California, prescribing 69% generic.

3K
Part D claims, 2023
69%
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.

ATUL ROY, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,504 Top 13% higher than 87% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 certification likely (heuristic — not verified)

ATUL ROY, 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 ATUL ROY, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/16/2006

NPI 1467496505

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

2,504 72% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in California

How Nephrology Physician compares to other specialties among California providers

California providers

Nephrology Physician share within California

1. Nephrology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nephrology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Nephrology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nephrology Physician ABMS/AOA estimate

Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

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).

ATUL ROY, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 1140 OLIVEWOOD DR, MERCED, CA, 95348, with a listed phone of (209) 725-2121. NPI 1467496505 was issued on 06/16/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ROY most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 2,504 prescription claims written by this provider, covering 403 Medicare beneficiaries and totaling roughly $953K in drug spend, split 31% brand-name and 69% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

1140 OLIVEWOOD DR
MERCED, CA 95348

Provider Details

NPI 1467496505
Specialty Nephrology Physician
Credentials M.D.
Gender Male
NPI Issued 06/16/2006

Hospital and facility affiliations

Facilities where ATUL ROY, 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.

THE NEPHROLOGY GROUP INC
MERCED, CA

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 ATUL ROY, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$369

Largest payer

Novo Nordisk 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 — California MBC 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 ~150K California medical licensees in 2023 — they are NOT specific to ATUL ROY, M.D.. To verify ATUL ROY, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Above average

ATUL ROY, M.D. — brand share 31.0%
Specialty average (est.)

31% brand-name claims vs 69% generic, on 2,504 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.

2,504
Total Claims
$953K
Total Drug Cost
403
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,410
Total Day Supply
158,682
Brand vs Generic
31% brand / 69% generic
Brand Drug Cost
$824K
Generic Drug Cost
$128K
Antibiotic Claims
17

Patient Demographics

Average Patient Age
73.4 years
Avg HCC Risk Score
3.53
Gender Split
51% female / 49% male
Age Distribution
<65: 67, 65-74: 132, 75-84: 143, 85+: 61

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What ATUL ROY, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Farxiga
Dapagliflozin Propanediol
201
Amlodipine Besylate
153
Jardiance
Empagliflozin
135
Losartan Potassium
126
Hydralazine Hcl
119
Lisinopril
104
Prosol
Parenteral Amino Acid 20% No.1
91
Atorvastatin Calcium
78
Sevelamer Carbonate
69
Calcium Acetate
67

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nephrology Physician Overview

How ATUL ROY, M.D. 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

ATUL ROY, M.D.'s 2,504 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as ROY.

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ATUL ROY, M.D.'s specialty?
ATUL ROY, M.D. specializes in Nephrology Physician and practices in MERCED, California. Credentials: M.D..
How much does ATUL ROY, M.D. prescribe under Medicare Part D?
In 2023, ATUL ROY, M.D. wrote 2,504 Medicare Part D claims totaling $953K in drug costs for 403 beneficiaries.
Where is ATUL ROY, M.D. located?
ATUL ROY, M.D. is located at 1140 OLIVEWOOD DR, MERCED, CA, 95348. Phone: (209) 725-2121.
What is ATUL ROY, M.D.'s NPI number?
ATUL ROY, M.D.'s National Provider Identifier (NPI) is 1467496505, issued on 06/16/2006.
Does ATUL ROY, M.D. prescribe more brand-name or generic drugs?
ATUL ROY, M.D.'s prescribing is 31% brand-name and 69% generic drugs by claim count, with $824K 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 ATUL ROY, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ATUL ROY, M.D.'s most frequently prescribed drugs include Farxiga, Amlodipine Besylate, Jardiance. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ATUL ROY, M.D. accept Medicare?
ATUL ROY, M.D. appears in CMS Medicare data with 2,504 Part D claims and 403 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ATUL ROY, M.D.'s credentials?
ATUL ROY, M.D.'s NPI is 1467496505 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

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