2026 NPPES data Nephrology Physician NPI 1225066939 M.D.
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RODERICK CLARK, M.D.

Nephrology Physician in LAFAYETTE, Louisiana. 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
567
Medicare Part D claims · 90 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$259.85
12 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: RODERICK CLARK, M.D. is a Nephrology Physician ([object Object]) practicing in LAFAYETTE, Louisiana with a Medicare Part D prescribing footprint of 567 claims across 90 beneficiaries — 14% brand-name prescribing . Industry payments of $259.85 across 12 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: RODERICK CLARK, M.D. filed 567 Medicare Part D claims in 2023 across LAFAYETTE, Louisiana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

RODERICK CLARK, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

RODERICK CLARK, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 06/29/2006

NPI 1225066939

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

567 61% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Louisiana

How Nephrology Physician compares to other specialties among Louisiana providers

Louisiana providers

Nephrology Physician share within Louisiana

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

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).

RODERICK CLARK, M.D. is a Nephrology Physician provider practicing in LAFAYETTE, Louisiana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1225066939. 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.

RODERICK CLARK, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 2804 AMBASSADOR CAFFERY PKWY, LAFAYETTE, LA, 70506, with a listed phone of (337) 981-5156. NPI 1225066939 was issued on 06/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARK 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 567 prescription claims written by this provider, covering 90 Medicare beneficiaries and totaling roughly $168K in drug spend, split 14% brand-name and 86% 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

2804 AMBASSADOR CAFFERY PKWY
LAFAYETTE, LA 70506

Provider Details

NPI 1225066939
Specialty Nephrology Physician
Credentials M.D.
Gender Male
NPI Issued 06/29/2006

Hospital and facility affiliations

Facilities where RODERICK CLARK, 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.

ACADIANA RENAL PHYSICIANS AMC
LAFAYETTE, LA
GULF COAST NEPHROLOGY, LLC
LAKE CHARLES, LA
LOUISIANA KIDNEY UPDATE LLC
LAFAYETTE, LA

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 RODERICK CLARK, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$260

Largest payer

AstraZeneca Pharmaceuticals LP

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.

Brand vs generic prescribing mix · Typical

RODERICK CLARK, M.D. — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 567 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.

567
Total Claims
$168K
Total Drug Cost
90
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
908
Total Day Supply
26,433
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$140K
Generic Drug Cost
$28K

Patient Demographics

Average Patient Age
67.4 years
Avg HCC Risk Score
5.35
Gender Split
50% female / 50% male
Age Distribution
<65: 31, 65-74: 27, 75-84: N/A, 85+: N/A

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
63
Amlodipine Besylate
56
Clonidine Hcl
41
Clonidine
33
Hydralazine Hcl
29
Potassium Chloride
27
Velphoro
Sucroferric Oxyhydroxide
18
Ramipril
16
Renvela
Sevelamer Carbonate
15
Auryxia
Ferric Citrate
13

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

Nephrology Physician Overview

How RODERICK CLARK, 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

RODERICK CLARK, M.D.'s 567 claims are below the specialty average of 1,454.

Nearby Nephrology Physician Providers in Louisiana

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

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

Frequently Asked Questions

What is RODERICK CLARK, M.D.'s specialty?
RODERICK CLARK, M.D. specializes in Nephrology Physician and practices in LAFAYETTE, Louisiana. Credentials: M.D..
How much does RODERICK CLARK, M.D. prescribe under Medicare Part D?
In 2023, RODERICK CLARK, M.D. wrote 567 Medicare Part D claims totaling $168K in drug costs for 90 beneficiaries.
Where is RODERICK CLARK, M.D. located?
RODERICK CLARK, M.D. is located at 2804 AMBASSADOR CAFFERY PKWY, LAFAYETTE, LA, 70506. Phone: (337) 981-5156.
What is RODERICK CLARK, M.D.'s NPI number?
RODERICK CLARK, M.D.'s National Provider Identifier (NPI) is 1225066939, issued on 06/29/2006.
Does RODERICK CLARK, M.D. prescribe more brand-name or generic drugs?
RODERICK CLARK, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $140K 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 RODERICK CLARK, M.D. prescribe most often?
Based on 2023 Medicare Part D data, RODERICK CLARK, M.D.'s most frequently prescribed drugs include Sevelamer Carbonate, Amlodipine Besylate, Clonidine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RODERICK CLARK, M.D. accept Medicare?
RODERICK CLARK, M.D. appears in CMS Medicare data with 567 Part D claims and 90 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RODERICK CLARK, M.D.'s credentials?
RODERICK CLARK, M.D.'s NPI is 1225066939 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