Silvia Fonseca, MD
NPI 1750867164 · Student in an Organized Health Care Education/Training Program · Martinez, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Silvia Fonseca, MD is a Student in an Organized Health Care Education/Training Program provider in Martinez, CA (NPI 1750867164).
Provider details
- NPI number
- 1750867164
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
83% 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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 40 | 14 |
| Atorvastatin Calcium | 39 | 16 |
| Losartan Potassium | 27 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 25 | — |
| Gabapentin | 24 | 11 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 21 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 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
- 2018-07-18
- Last updated
- 2018-07-18
Frequently asked questions
- What is Silvia Fonseca's NPI number?
- Silvia Fonseca's National Provider Identifier (NPI) is 1750867164, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Silvia Fonseca's specialty?
- Silvia Fonseca is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Silvia Fonseca located?
- Silvia Fonseca's practice location on file with NPPES is 2500 Alhambra Ave, Martinez, CA 94553-3156.
- What is Silvia Fonseca's phone number?
- The practice phone number listed in the NPPES registry for Silvia Fonseca is (925) 370-5000.
- Does Silvia Fonseca accept Medicare?
- Silvia Fonseca is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Silvia Fonseca's NPI active?
- Yes — Silvia Fonseca's NPI (1750867164) is active in the NPPES registry as of the last update on 2018-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.