Theresa Hoang Thuy Bach, PHARMD.
Pharmacist · San Marcos, CA
Theresa Hoang Thuy Bach, PHARMD. is a pharmacist with a practice address in San Marcos, California, and NPI 1740501147, issued on Jun 20, 2010. Check the license (California 56751, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Theresa Hoang Thuy Bach
- Credential
- PHARMD.
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 56751 CA
Self-reported in NPPES; status is on the state search - Practice location
- 121 S Rancho Santa FE RD, San Marcos, CA 92078
- Phone
- (760) 744-2583
- Enumerated
- Jun 20, 2010
- Record last updated
- Jun 20, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 121 S Rancho Santa FE RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Hill, RPHPharmacist1942514013
Verify Theresa Hoang Thuy Bach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 56751Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 100% of the cost of the top drugs
59 Medicare Part D claims for 58 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 93% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Shingrix24 claims
- Arexvy16 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.
Theresa Hoang Thuy Bach among 32,533 pharmacist records in California
Theresa Hoang Thuy Bach, PHARMD. 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 2010, is newer than 12% of them.
- NPI issued2010 · 12% of these records are older, 82% 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 updated2010 · 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).
96 pharmacist records list a practice address in San Marcos
They are 96 of the 1,985 NPPES records with a practice address in San Marcos, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in San Marcos → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Najlaa Al-Jibouri, PHARM DSan Marcos, CA 920781447438965
- Rose Feaver, PHARM.D.San Marcos, CA 920781043451404
- Leonard Koda, PH.D.San Marcos, CA 920781568507663
- Janice Lambert, PHARMDSan Marcos, CA 920781740450451
- Lundy Lee, PHARMDSan Marcos, CA 920781730203787
- Michael Lenzner, R.PH.San Marcos, CA 920781013230655
- Edward Martinez, PHARM D.San Marcos, CA 920781114195286
- Susan McGarry, PHARM DSan Marcos, CA 920781215104187
Common questions
What is Theresa Hoang Thuy Bach, PHARMD.'s NPI number?
Theresa Hoang Thuy Bach, PHARMD.'s National Provider Identifier (NPI) is 1740501147, issued on Jun 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Theresa Hoang Thuy Bach, PHARMD. located?
The NPPES record lists a practice address at 121 S Rancho Santa FE RD, San Marcos, CA, 92078. Phone: (760) 744-2583. Providers update this record themselves, so call before visiting.
How can I verify Theresa Hoang Thuy Bach, PHARMD.'s license?
NPPES lists California license number 56751, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Theresa Hoang Thuy Bach, PHARMD. prescribe under Medicare Part D?
In 2024, Theresa Hoang Thuy Bach, PHARMD. had 59 Medicare Part D claims for 58 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.