Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Sing L Hsu, RPH
Pharmacist in Yountville, CA · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1134584782
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Registry record
Entity type Individual (Type 1)
Name Ms. Sing L Hsu
Credential RPH
Sex Female
Practice address 123 California Dr, Yountville, CA, 94599
Phone (707) 944-4615
Enumeration date Dec 28, 2015
Last updated in NPPES Dec 28, 2015
Taxonomy & licenses
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy.
About the RPH 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
What specialty is Sing Hsu?
Sing Hsu is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Kimberly De Luna Pharmacist · Yountville, CA NPI 1578928701 Amy Yang Marriage & Family Therapist · Yountville, CA NPI 1336509751 Shelly Larson Pharmacist · Yountville, CA NPI 1578171252 Elizabeth Stachura Pharmacist · Yountville, CA NPI 1427717156 Victor Mcwilliams Pharmacist · Yountville, CA NPI 1306681721
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-28.