2026 NPPES data Emergency Medicine Physician NPI 1558338582 MD
Verify on CMS →

JOSEPH THOMAS, MD

Emergency Medicine Physician in BATON ROUGE, 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
479
Medicare Part D claims · 254 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JOSEPH THOMAS, MD filed 479 Medicare Part D claims in 2023 as a Emergency Medicine Physician in BATON ROUGE, Louisiana, prescribing 97% generic.

479
Part D claims, 2023
97%
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.

JOSEPH THOMAS, MD's Medicare Part D volume vs every U.S. prescriber

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

479 Top 38% higher than 62% 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%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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)

JOSEPH THOMAS, MD 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).

What does the federal data show about JOSEPH THOMAS, MD?

Quality data not reported

NPI registry status

Active

Issued 03/08/2006

NPI 1558338582

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

479 36% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in Louisiana

How Emergency Medicine Physician compares to other specialties among Louisiana providers

Louisiana providers

Emergency Medicine Physician share within Louisiana

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Emergency Medicine 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 THOMAS, MD appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding MD credentials at 3600 FLORIDA BLVD, BATON ROUGE, LA, 70806, with a listed phone of (225) 387-7603. NPI 1558338582 was issued on 03/08/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what THOMAS 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 479 prescription claims written by this provider, covering 254 Medicare beneficiaries and totaling roughly $12K in drug spend, split 3% brand-name and 97% 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

3600 FLORIDA BLVD
BATON ROUGE, LA 70806

Provider Details

NPI 1558338582
Specialty Emergency Medicine Physician
Credentials MD
Gender Male
NPI Issued 03/08/2006

Hospital and facility affiliations

Facilities where JOSEPH THOMAS, 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.

C AND M MEDICAL SERVICES INC
AMITE, LA
JUBAN POINT URGENT CARE LLC
DENHAM SPRINGS, LA
MAYFAIR EMERGENCY GROUP, LLC
BATON ROUGE, 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).

Brand vs generic prescribing mix · Generic-heavy

JOSEPH THOMAS, MD — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 479 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.

479
Total Claims
$12K
Total Drug Cost
254
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
497
Total Day Supply
5,799
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$8K
Generic Drug Cost
$4K
Antibiotic Claims
205

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
1.21
Gender Split
68% female / 32% male
Age Distribution
<65: 32, 65-74: 130, 75-84: 73, 85+: 19

Top Prescribed Drugs (Medicare Part D)

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

What JOSEPH THOMAS, MD 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
Azithromycin
46
Doxycycline Hyclate
37
Prednisone
33
Cefdinir
31
Fluticasone Propionate
31
Albuterol Sulfate Hfa
Albuterol Sulfate
30
Amoxicillin
24
Paxlovid (Eua)
Nirmatrelvir/Ritonavir
21
Ciprofloxacin Hcl
18
Levofloxacin
13

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

Emergency Medicine Physician Overview

How JOSEPH THOMAS, MD fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

JOSEPH THOMAS, MD's 479 claims are above the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Louisiana

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

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOSEPH THOMAS, MD's specialty?
JOSEPH THOMAS, MD specializes in Emergency Medicine Physician and practices in BATON ROUGE, Louisiana. Credentials: MD.
How much does JOSEPH THOMAS, MD prescribe under Medicare Part D?
In 2023, JOSEPH THOMAS, MD wrote 479 Medicare Part D claims totaling $12K in drug costs for 254 beneficiaries.
Where is JOSEPH THOMAS, MD located?
JOSEPH THOMAS, MD is located at 3600 FLORIDA BLVD, BATON ROUGE, LA, 70806. Phone: (225) 387-7603.
What is JOSEPH THOMAS, MD's NPI number?
JOSEPH THOMAS, MD's National Provider Identifier (NPI) is 1558338582, issued on 03/08/2006.
Does JOSEPH THOMAS, MD prescribe more brand-name or generic drugs?
JOSEPH THOMAS, MD's prescribing is 3% brand-name and 97% generic drugs by claim count, with $8K in brand drug costs.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does JOSEPH THOMAS, MD prescribe most often?
Based on 2023 Medicare Part D data, JOSEPH THOMAS, MD's most frequently prescribed drugs include Azithromycin, Doxycycline Hyclate, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOSEPH THOMAS, MD accept Medicare?
JOSEPH THOMAS, MD appears in CMS Medicare data with 479 Part D claims and 254 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOSEPH THOMAS, MD's credentials?
JOSEPH THOMAS, MD's NPI is 1558338582 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