Tammy Tan, PHARM.D.
NPI 1851468375 · Pharmacist · Redwood City, CA
Tammy Tan, PHARM.D. is a Pharmacist provider in Redwood City, CA (NPI 1851468375).
Provider details
- NPI number
- 1851468375
- Entity type
- Individual
- Primary specialty
- PharmacistPharmacy Service Providers
- Credential
- PHARM.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 49100 (CA)
Specialties & taxonomies
Pharmacy Service Providers
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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Spironolactone | 110 | 56 |
| Metoprolol Succinate | 95 | 36 |
| Empagliflozinbrand: Jardiance | 89 | 37 |
| Sacubitril/Valsartanbrand: Entresto | 75 | 34 |
| Carvedilol | 67 | 33 |
| Losartan Potassium | 43 | 20 |
| Furosemide | 35 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-29
- Last updated
- 2007-07-08
Frequently asked questions
- What is Tammy Tan's NPI number?
- Tammy Tan's National Provider Identifier (NPI) is 1851468375, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Tan's specialty?
- Tammy Tan is listed in the NPPES registry with a primary specialty of Pharmacist (Pharmacy Service Providers).
- Where is Tammy Tan located?
- Tammy Tan's practice location on file with NPPES is 1150 Veterans Blvd, Redwood City, CA 94063-2037.
- What is Tammy Tan's phone number?
- The practice phone number listed in the NPPES registry for Tammy Tan is (650) 299-4175.
- Is Tammy Tan's NPI active?
- Yes — Tammy Tan's NPI (1851468375) 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.