Oscar Castro
Oscar Castro is a Behavior Technician provider (Behavior Technician) practicing in Fairfield, CA, registered in the NPPES registry with NPI 1083289441 since 2021. Practices at Nexus Therapies LLC (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1083289441 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Oscar Castro |
| Sex | Male |
| Practice address | Fairfield, CA, 94534 |
| Phone | 8446363987 |
| Enumeration date | 2021-05-26 |
| Last updated in NPPES | 2021-05-26 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 106S00000X | Behavior Technician | Primary | — | — |
Copy-ready billing details
Provider: Oscar Castro NPI: 1083289441 Taxonomy: 106S00000X (Behavior Technician) Address: Fairfield, CA, 94534
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1184175010 | Sonia Ceja | Individual | Behavior Analyst | Fairfield, CA |
| 1831752781 | Nexus Therapies LLC | Organization | Early Intervention Provider Agency | Fairfield, CA |
| 1356943385 | Michael Faulstich | Individual | Behavior Analyst | Fairfield, CA |
| 1023770955 | Kaitlyn Walters | Individual | Behavior Technician | Fairfield, CA |
| 1447917679 | Cristian Mejia | Individual | Behavior Technician | Fairfield, CA |
| 1124785035 | Marifel Delco | Individual | Behavior Technician | Fairfield, CA |
| 1194468983 | Gracie Kincaid | Individual | Behavior Technician | Fairfield, CA |
| 1578200796 | Sofia Penate | Individual | Behavior Technician | Fairfield, CA |
Verify this record
Cross-check NPI 1083289441 against the authoritative CMS record: view Oscar Castro 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.
Frequently asked questions
Where does Oscar Castro practice?
What is the NPI number for Oscar Castro?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-05-26.