Theresa Sivers-Teixeira, PA-C
NPI 1235551995 · Medical Physician Assistant · Pasadena, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theresa Sivers-Teixeira, PA-C is a Medical Physician Assistant provider in Pasadena, CA (NPI 1235551995).
Provider details
- NPI number
- 1235551995
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 23192 (CA)
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 tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 36 | 12 |
| Levothyroxine Sodium | 30 | 13 |
| Losartan Potassium | 15 | — |
| Amlodipine Besylate | 14 | — |
| Lisinopril | 11 | — |
| Memantine Hcl | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-01-15
- Last updated
- 2023-11-27
- Certified
- 2020-08-28
Frequently asked questions
- What is Theresa Sivers-Teixeira's NPI number?
- Theresa Sivers-Teixeira's National Provider Identifier (NPI) is 1235551995, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Sivers-Teixeira's specialty?
- Theresa Sivers-Teixeira is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Theresa Sivers-Teixeira located?
- Theresa Sivers-Teixeira's practice location on file with NPPES is 625 South Fair Oaks, #400, Pasadena, CA 91105.
- What is Theresa Sivers-Teixeira's phone number?
- The practice phone number listed in the NPPES registry for Theresa Sivers-Teixeira is (626) 568-1622.
- Does Theresa Sivers-Teixeira accept Medicare?
- Theresa Sivers-Teixeira is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theresa Sivers-Teixeira's NPI active?
- Yes — Theresa Sivers-Teixeira's NPI (1235551995) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.