William John Cogan, D.C.
William John Cogan is a Chiropractor provider (Chiropractor) practicing in Manhattan Beach, CA, registered in the NPPES registry with NPI 1003251182 since 2013. The credential DC stands for Doctor of Chiropractic.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1003251182 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William John Cogan |
| Credential | D.C. |
| Sex | Male |
| Practice address | Manhattan Beach, CA, 90266 |
| Phone | 3104981230 |
| Enumeration date | 2013-05-02 |
| Last updated in NPPES | 2013-05-02 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111N00000X | Chiropractor | Primary | 23228 | CA |
| 111N00000X | Chiropractor | Secondary | C000021 | GU |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Copy-ready billing details
Provider: William Cogan, D.C. NPI: 1003251182 Taxonomy: 111N00000X (Chiropractor) Address: Manhattan Beach, CA, 90266
Verify this record
Cross-check NPI 1003251182 against the authoritative CMS record: view William John Cogan on the official NPPES registry .
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. Read the full guide or validate an NPI number.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-05-02.