Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Si Kathleen Liu, PHARM.D.
Pharmacist in Oakland, CA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1801144381
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Registry record
Entity type Individual (Type 1)
Name Dr. Si Kathleen Liu
Credential PHARM.D.
Sex Female
Practice address 1800 Harrison St Fl 13, Oakland, CA, 94612
Phone (925) 294-7056
Enumeration date Aug 15, 2012
Last updated in NPPES Dec 27, 2021
Taxonomy & licenses
PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy.
About the PHARMD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Si Liu practice?
The practice location on file with NPPES is in Oakland, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Si Liu?
The National Provider Identifier (NPI) for Si Liu is 1801144381, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Susan Yu Pharmacist · Oakland, CA NPI 1104940386 Kim Lau Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist · Oakland, CA NPI 1679776785 Geoffrey Ponting Pharmacist · Oakland, CA NPI 1508140583 Xiuting Lin Pharmacist · Oakland, CA NPI 1063778371 Cathlene Richmond Pharmacotherapy Pharmacist · Oakland, CA NPI 1770844722 Lucian Cheng Pharmacist · Oakland, CA NPI 1023358553 Tiffany Lew Pharmacist · Oakland, CA NPI 1063812071 Christopher Chang Pharmacist · Oakland, CA NPI 1780085837
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-27.