NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1326475724 FNP-C
Verify on CMS → Nathalie Alfonso, FNP-C
Family Nurse Practitioner in Hemet, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family Nurse Practitioner, 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
323
Medicare Part D claims · 167 beneficiaries · Family Nurse Practitioner avg: 1K
Industry payments
$169.23
8 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nathalie Alfonso, FNP-C filed 323 Medicare Part D claims in 2023 as a Family Nurse Practitioner in Hemet, California.
- 323
- Part D claims, 2023
- $169.23
- industry payments (Sunshine Act)
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.
Nathalie Alfonso, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
323 Top 43% higher than 57% 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
What does the federal data show about Nathalie Alfonso, FNP-C?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
323 74% vs specialty avg
Specialty distribution in California
How Family Nurse Practitioner compares to other specialties among California 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 Family Nurse Practitioner. 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).
Nathalie Alfonso, FNP-C appears in the CMS NPPES registry as a Family Nurse Practitioner provider holding FNP-C credentials at 540 N SAN JACINTO ST STE P, Hemet, CA, 92543, with a listed phone of (951) 929-4000. NPI 1326475724 was issued on 09/30/2013.
Medicare Part D records for calendar year 2023 show 323 prescription claims written by this provider, covering 167 Medicare beneficiaries and totaling roughly $38K in drug spend.
Family Nurse Practitioner is a high-volume specialty nationwide, with 210,832 enrolled providers across 56 states and an average of 1,222 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 | 1326475724 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | FNP-C |
| Gender | Female |
| NPI Issued | 09/30/2013 |
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 Nathalie Alfonso, FNP-C. Source: openpaymentsdata.cms.gov.
Total received
$169
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 Nathalie Alfonso, FNP-C. To verify Nathalie Alfonso, FNP-C'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
323
Total Claims
$38K
Total Drug Cost
167
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 737
- Total Day Supply
- 21,652
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 76.6 years
- Avg HCC Risk Score
- 2.60
- Gender Split
- 49% female / 51% male
- Age Distribution
- <65: 11, 65-74: 58, 75-84: 65, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nathalie Alfonso, FNP-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Carvedilol
Carvedilol
22 claims
- Atorvastatin Calcium
Atorvastatin Calcium
21 claims
- Furosemide
Furosemide
21 claims
- Metoprolol Succinate
Metoprolol Succinate
20 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
17 claims
- Amlodipine Besylate
Amlodipine Besylate
15 claims
- Eliquis
Eliquis
13 claims
- Losartan Potassium
Losartan Potassium
13 claims
| Drug | Claims |
|---|---|
| Carvedilol | 22 |
| Atorvastatin Calcium | 21 |
| Furosemide | 21 |
| Metoprolol Succinate | 20 |
| Rosuvastatin Calcium | 17 |
| Amlodipine Besylate | 15 |
| Eliquis Apixaban | 13 |
| Losartan Potassium | 13 |
| Clopidogrel Clopidogrel Bisulfate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Nathalie Alfonso, FNP-C fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Nathalie Alfonso, FNP-C's 323 claims are below the specialty average of 1,222.
Nearby Family Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Alfonso.
Dr. Danielle Aaroe
FAMILY NURSE PRACTIT
Oroville, CA
Joshua Aaron
Mission Hills, CA
Dr. Orly Aaron
NP
San Francisco, CA
Paris Gilbert Russ Aaron
Sacramento, CA
Dr. Alvin Joseph Abad
FNP-C
San Francisco, CA
Compare Family Nurse Practitioner 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Nurse Practitioner 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 Nathalie Alfonso, FNP-C's specialty? ▼
Nathalie Alfonso, FNP-C specializes in Family Nurse Practitioner and practices in Hemet, California. Credentials: FNP-C.
How much does Nathalie Alfonso, FNP-C prescribe under Medicare Part D? ▼
In 2023, Nathalie Alfonso, FNP-C wrote 323 Medicare Part D claims totaling $38K in drug costs for 167 beneficiaries.
Where is Nathalie Alfonso, FNP-C located? ▼
Nathalie Alfonso, FNP-C is located at 540 N SAN JACINTO ST STE P, Hemet, CA, 92543. Phone: (951) 929-4000.
What is Nathalie Alfonso, FNP-C's NPI number? ▼
Nathalie Alfonso, FNP-C's National Provider Identifier (NPI) is 1326475724, issued on 09/30/2013.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Nathalie Alfonso, FNP-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Nathalie Alfonso, FNP-C's most frequently prescribed drugs include Carvedilol, Atorvastatin Calcium, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nathalie Alfonso, FNP-C accept Medicare? ▼
Nathalie Alfonso, FNP-C appears in CMS Medicare data with 323 Part D claims and 167 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nathalie Alfonso, FNP-C's credentials? ▼
Nathalie Alfonso, FNP-C's NPI is 1326475724 with credentials FNP-C. 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.