Caroline Tsen, MD
NPI 1902984545 · Internal Medicine Physician · South San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caroline Tsen, MD is a Internal Medicine Physician provider in South San Francisco, CA (NPI 1902984545).
Provider details
- NPI number
- 1902984545
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G85972 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 401 | 137 |
| Lisinopril | 274 | 86 |
| Losartan Potassium | 216 | 76 |
| Metoprolol Succinate | 200 | 60 |
| Amlodipine Besylate | 175 | 67 |
| Simvastatin | 153 | 49 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-20
Frequently asked questions
- What is Caroline Tsen's NPI number?
- Caroline Tsen's National Provider Identifier (NPI) is 1902984545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caroline Tsen's specialty?
- Caroline Tsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Caroline Tsen located?
- Caroline Tsen's practice location on file with NPPES is 1200 El Camino Real, South San Francisco, CA 94080-3208.
- What is Caroline Tsen's phone number?
- The practice phone number listed in the NPPES registry for Caroline Tsen is (650) 742-2000.
- Does Caroline Tsen accept Medicare?
- Caroline Tsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caroline Tsen's NPI active?
- Yes — Caroline Tsen's NPI (1902984545) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.