Teresita Guanzon, MD
NPI 1306877055 · Internal Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Teresita Guanzon, MD is a Internal Medicine Physician provider in San Jose, CA (NPI 1306877055).
Provider details
- NPI number
- 1306877055
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A46671 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 60 | 39 |
| Losartan Potassium | 49 | 25 |
| Amlodipine Besylate | 43 | 32 |
| Metformin Hcl | 32 | 18 |
| Rosuvastatin Calcium | 27 | 14 |
| Empagliflozinbrand: Jardiance | 23 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,645 across 65 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
- 2006-07-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Teresita Guanzon's NPI number?
- Teresita Guanzon's National Provider Identifier (NPI) is 1306877055, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Teresita Guanzon's specialty?
- Teresita Guanzon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Teresita Guanzon located?
- Teresita Guanzon's practice location on file with NPPES is 2395 Montpelier Dr, San Jose, CA 95116-1619.
- What is Teresita Guanzon's phone number?
- The practice phone number listed in the NPPES registry for Teresita Guanzon is (408) 272-3041.
- Does Teresita Guanzon accept Medicare?
- Teresita Guanzon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Teresita Guanzon's NPI active?
- Yes — Teresita Guanzon's NPI (1306877055) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.