Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Carolyn Langer, DDS
Dentist in Castro Valley, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104980309
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Registry record
Entity type Individual (Type 1)
Name Carolyn Langer
Credential DDS
Sex Female
Practice address 20600 Lake Chabot Rd, Suite 201, Castro Valley, CA, 94546
Phone (510) 538-5339
Fax (510) 538-2768
Enumeration date Dec 21, 2006
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
Where does Carolyn Langer practice?
The practice location on file with NPPES is in Castro Valley, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Carolyn Langer?
The National Provider Identifier (NPI) for Carolyn Langer is 1104980309, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Michael Preston Dentist · Castro Valley, CA NPI 1194706523 David Fosdahl Dentist · Castro Valley, CA NPI 1053460121 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.