Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Lynne W Hsia, DDS
Pediatric Dentistry in Sonoma, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558435685
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Registry record
Entity type Individual (Type 1)
Name Dr. Lynne W Hsia
Credential DDS
Sex Female
Practice address 248 Perkins St, Sonoma, CA, 95476
Phone (707) 938-7660
Fax (707) 721-1635
Enumeration date Nov 20, 2006
Last updated in NPPES May 28, 2013
Taxonomy & licenses
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees.
About the DDS 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
Is NPI 1558435685 active?
Yes, as of the latest NPPES snapshot, NPI 1558435685 is active (record last updated 2013-05-28).
How do I verify Lynne Hsia's NPI record?
Cross-check NPI 1558435685 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-28.