Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alexander Kosker, D.C.
Chiropractor in Toluca Lake, CA · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285417311
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Registry record
Entity type Individual (Type 1)
Name Alexander Kosker
Credential D.C.
Sex Male
Practice address 10142 Riverside Dr, Toluca Lake, CA, 91602
Phone (818) 505-9977
Enumeration date Aug 14, 2023
Last updated in NPPES Aug 14, 2023
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC 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 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.
What specialty is Alexander Kosker?
Alexander Kosker is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-14.