Donna Siazon
NPI 1952946618 · Nurse Practitioner · San Bernardino, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donna Siazon is a Nurse Practitioner provider in San Bernardino, CA (NPI 1952946618).
Provider details
- NPI number
- 1952946618
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95013252 (CA)
Specialties & taxonomies
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
6 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 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 84 | 31 |
| Amlodipine Besylate | 47 | 16 |
| Metformin Hcl | 47 | 20 |
| Lisinopril | 33 | 13 |
| Losartan Potassium | 30 | 12 |
| Levothyroxine Sodium | 27 | — |
| Empagliflozin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$30 across 1 record (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
- 2019-11-16
- Last updated
- 2019-11-16
Frequently asked questions
- What is Donna Siazon's NPI number?
- Donna Siazon's National Provider Identifier (NPI) is 1952946618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donna Siazon's specialty?
- Donna Siazon is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Donna Siazon located?
- Donna Siazon's practice location on file with NPPES is 1800 Western Ave Ste 303, San Bernardino, CA 92411-1354.
- What is Donna Siazon's phone number?
- The practice phone number listed in the NPPES registry for Donna Siazon is (909) 887-6715.
- Does Donna Siazon accept Medicare?
- Donna Siazon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donna Siazon's NPI active?
- Yes — Donna Siazon's NPI (1952946618) is active in the NPPES registry as of the last update on 2019-11-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.