Tammy M. Tan, PHARM.D.
Pharmacist · Redwood City, CA
Tammy M. Tan, PHARM.D. is a pharmacist with a practice address in Redwood City, California, and NPI 1851468375, issued on Nov 29, 2006. Check the license (California 49100, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tammy M. Tan
- Credential
- PHARM.D.
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 49100 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1150 Veterans Blvd, Redwood City, CA 94063
- Phone
- (650) 299-4175
- Enumerated
- Nov 29, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (650) 299-4220
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 1150 Veterans Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Tammy M. Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 49100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.8 times the Medicare Part D claims of the average pharmacist in 2024
566 Medicare Part D claims for 89 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Spironolactone110 claims
- Metoprolol Succinate95 claims
- Jardiance89 claims
- Entresto75 claims
- Carvedilol67 claims
- Losartan Potassium43 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Tammy M. Tan among 32,533 pharmacist records in California
Tammy M. Tan, PHARM.D. is one of 32,533 pharmacist records with a practice address in California. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than under 1% of them.
- NPI issued2006 · under 1% of these records are older, 94% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
133 pharmacist records list a practice address in Redwood City
They are 133 of the 2,795 NPPES records with a practice address in Redwood City, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Redwood City → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Joanne Chou, PHARMDRedwood City, CA 940631346310828
- Thomas Chun, PHARM.D.Redwood City, CA 940631710057005
- Betty Jue, PHARM. D.Redwood City, CA 940631184795544
- Tedd Kimelman, R.PH.Redwood City, CA 940631912086968
- Pauline Kirkpatrick, PHARMDRedwood City, CA 940631407927676
- Tai Ning Lam, PHARMDRedwood City, CA 940631508952722
- Margarita Larina, RPHRedwood City, CA 940631720158371
- Danny Lee, PHARM.D.Redwood City, CA 940631013089101
Common questions
What is Tammy M. Tan, PHARM.D.'s NPI number?
Tammy M. Tan, PHARM.D.'s National Provider Identifier (NPI) is 1851468375, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tammy M. Tan, PHARM.D. located?
The NPPES record lists a practice address at 1150 Veterans Blvd, Redwood City, CA, 94063. Phone: (650) 299-4175. Providers update this record themselves, so call before visiting.
How can I verify Tammy M. Tan, PHARM.D.'s license?
NPPES lists California license number 49100, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tammy M. Tan, PHARM.D. prescribe under Medicare Part D?
In 2024, Tammy M. Tan, PHARM.D. had 566 Medicare Part D claims for 89 beneficiaries; the average among pharmacist prescribers was 119. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.