NPI registry status
Active
2026 NPPES data Radiation Oncology Physician NPI 1003255761 M.D.
Verify on CMS → Natalie Alphonse Sullivan, M.D.
Radiation Oncology Physician in Alexandria, 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 6,029 in Radiation Oncology 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
336
Medicare Part D claims · 143 beneficiaries · Radiation Oncology Physician avg: 186
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
▼ 8 pts below national avg 83.1 · Above neutral
Industry payments
$88.88
4 payments · CMS Open Payments (Sunshine Act)
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
Natalie Alphonse Sullivan, M.D. reported a CMS MIPS final score of 75/100 - below the 83.1 national average - and filed 336 Medicare Part D claims in 2023.
- 75/100
- MIPS score · -8 vs avg
- 336
- Part D claims, 2023
- 81%
- 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.
Natalie Alphonse Sullivan, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
75 15th percentile higher than 15% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Natalie Alphonse Sullivan, M.D. sits
This provider among radiation oncology physician peers
Across the 1,988 radiation oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Natalie Alphonse Sullivan, M.D. writes more Part D claims than 92% of them and scores higher on MIPS quality than 12% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one radiation oncology physician peer from a representative sample of 60; the gold marker is Natalie Alphonse Sullivan, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Natalie Alphonse Sullivan, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Natalie Alphonse Sullivan, M.D.?
Below national averagePrimary specialty
Radiation Oncology Physician
Medicare Part D claims
336 81% vs specialty avg
MIPS final score
75/100 8.1 pts vs avg
Specialty distribution in Louisiana
How Radiation Oncology Physician compares to other specialties among Louisiana providers
Medicare quality performance, MIPS
Natalie Alphonse Sullivan, M.D.'s 2023 MIPS final score plotted against the Radiation Oncology Physician national average
- MIPS Final Score
- 75/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Radiation Oncology Physician) - 75/100 vs national avg 83.1
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).
Natalie Alphonse Sullivan, M.D. appears in the CMS NPPES registry as a Radiation Oncology Physician provider holding M.D. credentials at 3330 MASONIC DR, Alexandria, LA, 71301, with a listed phone of (318) 448-6917. NPI 1003255761 was issued on 06/17/2013.
Medicare Part D records for calendar year 2023 show 336 prescription claims written by this provider, covering 143 Medicare beneficiaries and totaling roughly $27K in drug spend, split 19% brand-name and 81% generic by claim count, with an opioid prescribing rate of 10.7%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 75/100 for the 2023 performance year, compared with the national average of 83.1.
Radiation Oncology Physician is a mid-sized specialty nationwide, with 6,029 enrolled providers across 53 states and an average of 186 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 | 1003255761 |
|---|---|
| Specialty | Radiation Oncology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/17/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
Avg: 83.1
Reporting: Individual
Hospital and facility affiliations
Facilities where Natalie Alphonse Sullivan, 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.
Lakeland Regional Health Systems Inc
Lakeland, FL
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 Natalie Alphonse Sullivan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$89
Largest payer
PROGENICS PHARMACEUTICALS, 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.
Brand vs generic prescribing mix · Typical
Natalie Alphonse Sullivan, M.D. - brand share 19.0%
Radiation Oncology Physician average
19% brand-name claims vs 81% generic, on 336 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.
336
Total Claims
$27K
Total Drug Cost
143
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 393
- Total Day Supply
- 7,783
- Brand vs Generic
- 19% brand / 81% generic
- Brand Drug Cost
- $21K
- Generic Drug Cost
- $5K
- Opioid Claims
- 36 (10.7% rate)
- Antibiotic Claims
- 23
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 1.78
- Gender Split
- 45% female / 55% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Natalie Alphonse Sullivan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
45 claims
- Silver Sulfadiazine
Silver Sulfadiazine
29 claims
- Fluconazole
Fluconazole
23 claims
- Sucralfate
Sucralfate
22 claims
- Lidocaine Hcl Visc…
Lidocaine Hcl Viscous
21 claims
- Oxycodone Hcl 16
Oxycodone Hcl
16 claims
- Ssd 14
Ssd
14 claims
- Lorazepam 11
Lorazepam
11 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 45 |
| Silver Sulfadiazine | 29 |
| Fluconazole | 23 |
| Sucralfate | 22 |
| Lidocaine Hcl Viscous Lidocaine Hcl | 21 |
| Oxycodone Hcl | 16 |
| Ssd Silver Sulfadiazine | 14 |
| Lorazepam | 11 |
| Mometasone Furoate | 11 |
| Nystatin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Radiation Oncology Physician Overview
How Natalie Alphonse Sullivan, M.D. fits within the Radiation Oncology Physician landscape nationally.
6,029
Radiation Oncology Physician Providers in US
53
States with Radiation Oncology Physician
186
Avg Claims per Provider
Natalie Alphonse Sullivan, M.D.'s 336 claims are above the specialty average of 186.
Nearby Radiation Oncology Physician Providers in Louisiana
Other clinicians with the same primary specialty enrolled in Louisiana, drawn from the same CMS NPPES roster as Alphonse Sullivan.
Dr. John Anderson
MD
Lafayette, LA
Dr. Russell Anderson
MD
Shreveport, LA
Dr. Roxana Baluna
M.D.
Shreveport, LA
Dr. Richard Bermudez
M.D.
Covington, LA
Dr. Ross Bland
M.D.
Monroe, LA
Compare Radiation Oncology 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 Radiation Oncology 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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Frequently Asked Questions
What is Natalie Alphonse Sullivan, M.D.'s specialty? ▼
Natalie Alphonse Sullivan, M.D. specializes in Radiation Oncology Physician and practices in Alexandria, Louisiana. Credentials: M.D..
How much does Natalie Alphonse Sullivan, M.D. prescribe under Medicare Part D? ▼
In 2023, Natalie Alphonse Sullivan, M.D. wrote 336 Medicare Part D claims totaling $27K in drug costs for 143 beneficiaries.
What is Natalie Alphonse Sullivan, M.D.'s Medicare quality score? ▼
Natalie Alphonse Sullivan, M.D. has a CMS MIPS Final Score of 75/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Natalie Alphonse Sullivan, M.D. located? ▼
Natalie Alphonse Sullivan, M.D. is located at 3330 MASONIC DR, Alexandria, LA, 71301. Phone: (318) 448-6917.
What is Natalie Alphonse Sullivan, M.D.'s NPI number? ▼
Natalie Alphonse Sullivan, M.D.'s National Provider Identifier (NPI) is 1003255761, issued on 06/17/2013.
Does Natalie Alphonse Sullivan, M.D. prescribe more brand-name or generic drugs? ▼
Natalie Alphonse Sullivan, M.D.'s prescribing is 19% brand-name and 81% generic drugs by claim count, with $21K in brand drug costs.
Does Natalie Alphonse Sullivan, M.D. prescribe opioids? ▼
Yes, Natalie Alphonse Sullivan, M.D. had 36 opioid claims in 2023 with an opioid prescribing rate of 10.7%.
How many Radiation Oncology Physician providers are there in the US? ▼
There are 6,029 Radiation Oncology Physician providers across 53 states in the US. The average Radiation Oncology Physician provider writes 186 Medicare Part D claims per year.
What drugs does Natalie Alphonse Sullivan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Natalie Alphonse Sullivan, M.D.'s most frequently prescribed drugs include Tamsulosin Hcl, Silver Sulfadiazine, Fluconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Natalie Alphonse Sullivan, M.D. accept Medicare? ▼
Natalie Alphonse Sullivan, M.D. appears in CMS Medicare data with 336 Part D claims and 143 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Natalie Alphonse Sullivan, M.D.'s credentials? ▼
Natalie Alphonse Sullivan, M.D.'s NPI is 1003255761 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.