2026 NPPES data Nephrology Physician NPI 1467420679 MD
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JOSEPH DUFLOT, MD

Nephrology Physician in FRESNO, 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
4K
Medicare Part D claims · 684 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
55 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: JOSEPH DUFLOT, MD is a Nephrology Physician ([object Object]) practicing in FRESNO, California with a Medicare Part D prescribing footprint of 4K claims across 684 beneficiaries — 14% brand-name prescribing . Industry payments of $1.1K across 55 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: JOSEPH DUFLOT, MD filed 3,946 Medicare Part D claims in 2023 across FRESNO, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

JOSEPH DUFLOT, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

JOSEPH DUFLOT, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/14/2006

NPI 1467420679

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

3,946 171% 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).

JOSEPH DUFLOT, MD is a Nephrology Physician provider practicing in FRESNO, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1467420679. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

JOSEPH DUFLOT, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 568 E HERNDON AVE STE 201, FRESNO, CA, 93720, with a listed phone of (559) 228-6600. NPI 1467420679 was issued on 03/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DUFLOT 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 3,946 prescription claims written by this provider, covering 684 Medicare beneficiaries and totaling roughly $663K in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 0.8%. 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

568 E HERNDON AVE STE 201
FRESNO, CA 93720

Provider Details

NPI 1467420679
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 03/14/2006

Hospital and facility affiliations

Facilities where JOSEPH DUFLOT, 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.

CENTRAL CALIFORNIA FACULTY MEDICAL GROUP INC
FRESNO, CA
THE NEPHROLOGY GROUP INC
FRESNO, 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 JOSEPH DUFLOT, MD. Source: openpaymentsdata.cms.gov.

Total received

$1.1K

Largest payer

Amgen 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 JOSEPH DUFLOT, MD. To verify JOSEPH DUFLOT, MD'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 · Typical

JOSEPH DUFLOT, MD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 3,946 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.

3,946
Total Claims
$663K
Total Drug Cost
684
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,678
Total Day Supply
254,222
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$463K
Generic Drug Cost
$200K
Opioid Claims
31 (0.8% rate)
Antibiotic Claims
119

Patient Demographics

Average Patient Age
72.5 years
Avg HCC Risk Score
3.93
Gender Split
49% female / 51% male
Age Distribution
<65: 125, 65-74: 231, 75-84: 227, 85+: 101

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Sevelamer Carbonate
241
Amlodipine Besylate
230
Carvedilol
214
Losartan Potassium
186
Furosemide
155
Hydralazine Hcl
128
Lisinopril
118
Calcium Acetate
102
Torsemide
99
Allopurinol
88

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

Nephrology Physician Overview

How JOSEPH DUFLOT, 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

JOSEPH DUFLOT, MD's 3,946 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 DUFLOT.

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

Frequently Asked Questions

What is JOSEPH DUFLOT, MD's specialty?
JOSEPH DUFLOT, MD specializes in Nephrology Physician and practices in FRESNO, California. Credentials: MD.
How much does JOSEPH DUFLOT, MD prescribe under Medicare Part D?
In 2023, JOSEPH DUFLOT, MD wrote 3,946 Medicare Part D claims totaling $663K in drug costs for 684 beneficiaries.
Where is JOSEPH DUFLOT, MD located?
JOSEPH DUFLOT, MD is located at 568 E HERNDON AVE STE 201, FRESNO, CA, 93720. Phone: (559) 228-6600.
What is JOSEPH DUFLOT, MD's NPI number?
JOSEPH DUFLOT, MD's National Provider Identifier (NPI) is 1467420679, issued on 03/14/2006.
Does JOSEPH DUFLOT, MD prescribe more brand-name or generic drugs?
JOSEPH DUFLOT, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $463K in brand drug costs.
Does JOSEPH DUFLOT, MD prescribe opioids?
Yes, JOSEPH DUFLOT, MD had 31 opioid claims in 2023 with an opioid prescribing rate of 0.8%.
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 JOSEPH DUFLOT, MD prescribe most often?
Based on 2023 Medicare Part D data, JOSEPH DUFLOT, MD's most frequently prescribed drugs include Sevelamer Carbonate, Amlodipine Besylate, Carvedilol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOSEPH DUFLOT, MD accept Medicare?
JOSEPH DUFLOT, MD appears in CMS Medicare data with 3,946 Part D claims and 684 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOSEPH DUFLOT, MD's credentials?
JOSEPH DUFLOT, MD's NPI is 1467420679 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

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