Nathalie Alfonso, FNP-C
NPI 1326475724 · Nurse Practitioner · Hemet, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathalie Alfonso, FNP-C is a Nurse Practitioner provider in Hemet, CA (NPI 1326475724).
Provider details
- NPI number
- 1326475724
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- AP4940 (AZ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
12 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 80 | 44 |
| Metformin Hcl | 66 | 33 |
| Amlodipine Besylate | 53 | 28 |
| Lisinopril | 46 | 24 |
| Hydrochlorothiazide | 36 | 23 |
| Glipizide | 34 | 16 |
| Losartan Potassium | 32 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$169 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-09-30
- Last updated
- 2023-10-24
- Certified
- 2023-10-24
Frequently asked questions
- What is Nathalie Alfonso's NPI number?
- Nathalie Alfonso's National Provider Identifier (NPI) is 1326475724, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathalie Alfonso's specialty?
- Nathalie Alfonso is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Nathalie Alfonso located?
- Nathalie Alfonso's practice location on file with NPPES is 540 N San Jacinto St Ste P, Hemet, CA 92543-3154.
- What is Nathalie Alfonso's phone number?
- The practice phone number listed in the NPPES registry for Nathalie Alfonso is (951) 929-4000.
- Does Nathalie Alfonso accept Medicare?
- Nathalie Alfonso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathalie Alfonso's NPI active?
- Yes — Nathalie Alfonso's NPI (1326475724) is active in the NPPES registry as of the last update on 2023-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.