Greg Williamson
Greg Williamson is a Behavior Analyst provider (Behavior Analyst) practicing in Manhattan Beach, CA, registered in the NPPES registry with NPI 1902463359 since 2019.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1902463359 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Greg Williamson |
| Sex | Male |
| Practice address | Manhattan Beach, CA, 90266 |
| Phone | 3104061500 |
| Enumeration date | 2019-05-21 |
| Last updated in NPPES | 2019-05-21 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103K00000X | Behavior Analyst | Primary | — | — |
Copy-ready billing details
Provider: Greg Williamson NPI: 1902463359 Taxonomy: 103K00000X (Behavior Analyst) Address: Manhattan Beach, CA, 90266
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1508233388 | Deborah Sanders | Individual | Behavior Analyst | Manhattan Beach, CA |
| 1679937320 | Thomas Vanmarter | Individual | Behavior Analyst | Manhattan Beach, CA |
| 1417489204 | Andrew Frisina | Individual | Behavior Analyst | Manhattan Beach, CA |
| 1184130114 | Maira Sandoval | Individual | Behavior Technician | Manhattan Beach, CA |
| 1851807861 | Denise Vo | Individual | Behavior Technician | Manhattan Beach, CA |
| 1942717061 | Kody Harms | Individual | Behavior Technician | Manhattan Beach, CA |
| 1750899720 | Carlo Farrales | Individual | Behavior Technician | Manhattan Beach, CA |
| 1770091589 | Efrain Gonzalez | Individual | Behavior Analyst | Manhattan Beach, CA |
Verify this record
Cross-check NPI 1902463359 against the authoritative CMS record: view Greg Williamson 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 2019-05-21.