NPI registry status
Active
2026 NPPES data Reproductive Endocrinology Physician NPI 1740286343 M.D.
Verify on CMS → William Roniger, M.D.
Reproductive Endocrinology Physician in Metairie, Louisiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,421 in Reproductive Endocrinology 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
51
Medicare Part D claims · 18 beneficiaries · Reproductive Endocrinology Physician avg: 104
Generic prescribing
29%
generic claims · 71% brand-name · higher generic rates reduce patient out-of-pocket costs
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
William Roniger, M.D. filed 51 Medicare Part D claims in 2023 as a Reproductive Endocrinology Physician in Metairie, Louisiana, prescribing 29% generic.
- 51
- Part D claims, 2023
- 29%
- generic prescribing
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.
William Roniger, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
51 0th percentile higher than 0% of 1,370,886 prescribers
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-eligible specialty (heuristic, not verified)
William Roniger, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Roniger, M.D.?
Quality data not reportedPrimary specialty
Reproductive Endocrinology Physician
Medicare Part D claims
51 51% vs specialty avg
Specialty distribution in Louisiana
How Reproductive Endocrinology Physician compares to other specialties among Louisiana providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Reproductive Endocrinology Physician. Verify directly:
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).
William Roniger, M.D. appears in the CMS NPPES registry as a Reproductive Endocrinology Physician provider holding M.D. credentials at 412 AURORA AVE, Metairie, LA, 70005, with a listed phone of (504) 371-8612. NPI 1740286343 was issued on 06/28/2005.
Medicare Part D records for calendar year 2023 show 51 prescription claims written by this provider, covering 18 Medicare beneficiaries and totaling roughly $34K in drug spend, split 71% brand-name and 29% generic by claim count.
Reproductive Endocrinology Physician is a narrow specialty nationwide, with 1,421 enrolled providers across 48 states and an average of 104 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 | 1740286343 |
|---|---|
| Specialty | Reproductive Endocrinology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/28/2005 |
Brand vs generic prescribing mix · Brand-heavy
William Roniger, M.D. - brand share 71.0%
Reproductive Endocrinology Physician average
71% brand-name claims vs 29% generic, on 51 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.
51
Total Claims
$34K
Total Drug Cost
18
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 68
- Total Day Supply
- 1,796
- Brand vs Generic
- 71% brand / 29% generic
- Brand Drug Cost
- $33K
- Generic Drug Cost
- $151
Patient Demographics
- Average Patient Age
- 67.2 years
- Avg HCC Risk Score
- 0.82
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Mounjaro Tirzepatide | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Reproductive Endocrinology Physician in LA →
All providers in Louisiana →
Compare specialties →
Reproductive Endocrinology Physician Overview
How William Roniger, M.D. fits within the Reproductive Endocrinology Physician landscape nationally.
1,421
Reproductive Endocrinology Physician Providers in US
48
States with Reproductive Endocrinology Physician
104
Avg Claims per Provider
William Roniger, M.D.'s 51 claims are below the specialty average of 104.
Nearby Reproductive Endocrinology Physician Providers in Louisiana
Other clinicians with the same primary specialty enrolled in Louisiana, drawn from the same CMS NPPES roster as Roniger.
Dr. Heber Dunaway
M.D.
Mandeville, LA
Dr. Keith Isaacson
MD
New Orleans, LA
Dr. Caroline Juneau
M.D.
New Orleans, LA
Dr. Robert Kelly
M.D.
Metairie, LA
Dr. Steve London
M.D.
Shreveport, LA
Compare Reproductive Endocrinology 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 Louisiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Reproductive Endocrinology 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.
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is William Roniger, M.D.'s specialty? ▼
William Roniger, M.D. specializes in Reproductive Endocrinology Physician and practices in Metairie, Louisiana. Credentials: M.D..
How much does William Roniger, M.D. prescribe under Medicare Part D? ▼
In 2023, William Roniger, M.D. wrote 51 Medicare Part D claims totaling $34K in drug costs for 18 beneficiaries.
Where is William Roniger, M.D. located? ▼
William Roniger, M.D. is located at 412 AURORA AVE, Metairie, LA, 70005. Phone: (504) 371-8612.
What is William Roniger, M.D.'s NPI number? ▼
William Roniger, M.D.'s National Provider Identifier (NPI) is 1740286343, issued on 06/28/2005.
Does William Roniger, M.D. prescribe more brand-name or generic drugs? ▼
William Roniger, M.D.'s prescribing is 71% brand-name and 29% generic drugs by claim count, with $33K in brand drug costs.
How many Reproductive Endocrinology Physician providers are there in the US? ▼
There are 1,421 Reproductive Endocrinology Physician providers across 48 states in the US. The average Reproductive Endocrinology Physician provider writes 104 Medicare Part D claims per year.
What drugs does William Roniger, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Roniger, M.D.'s most frequently prescribed drugs include Mounjaro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Roniger, M.D. accept Medicare? ▼
William Roniger, M.D. appears in CMS Medicare data with 51 Part D claims and 18 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Roniger, M.D.'s credentials? ▼
William Roniger, M.D.'s NPI is 1740286343 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
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.
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.