Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. David Thomas Fosdahl, DDS
Dentist in Castro Valley, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1053460121
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Registry record
Entity type Individual (Type 1)
Name Dr. David Thomas Fosdahl
Credential DDS
Sex Male
Practice address 20600 Lake Chabot Rd, Suite 101, Castro Valley, CA, 94546
Phone (510) 582-8399
Fax (510) 582-3564
Enumeration date Jan 9, 2007
Last updated in NPPES Jul 8, 2007
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 1053460121 active?
Yes, as of the latest NPPES snapshot, NPI 1053460121 is active (record last updated 2007-07-08).
How do I verify David Fosdahl's NPI record?
Cross-check NPI 1053460121 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 → Michael Preston Dentist · Castro Valley, CA NPI 1194706523 Carolyn Langer Dentist · Castro Valley, CA NPI 1104980309 Shen and Busquets Dental Partnership Orthodontics and Dentofacial Orthopedics Dentistry · Castro Valley, CA NPI 1003362955 Nicholas Tj Yatco DDS Inc Dental Clinic/Center · Castro Valley, CA NPI 1912565151
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.