Dr. Silvina Alejandra Irwin, PH.D.
Dr. Silvina Alejandra Irwin is a Clinical Psychologist provider (Psychologist) practicing in Pasadena, CA, registered in the NPPES registry with NPI 1881817864 since 2007. The credential PHD stands for Doctor of Philosophy. Practices at Foothill Physical Therapy PC (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1881817864 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Silvina Alejandra Irwin |
| Credential | PH.D. |
| Sex | Female |
| Practice address | Pasadena, CA, 91101 |
| Phone | 6263994013 |
| Fax | 6265850440 |
| Enumeration date | 2007-04-10 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Primary | 19710 | CA |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Copy-ready billing details
Provider: Silvina Irwin, PH.D. NPI: 1881817864 Taxonomy: 103TC0700X (Clinical Psychologist) Address: Pasadena, CA, 91101
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1801827118 | Emily Moore | Individual | Marriage & Family Therapist | Pasadena, CA |
| 1154428241 | Deborah Buckwalter | Individual | Clinical Psychologist | Pasadena, CA |
| 1841371127 | Carol Fred | Individual | Clinical Social Worker | Pasadena, CA |
| 1508903022 | Lisa Blum | Individual | Clinical Psychologist | Pasadena, CA |
| 1407995335 | Douglas Thomas | Individual | Clinical Social Worker | Pasadena, CA |
| 1639392194 | Christine Cooper | Individual | Clinical Psychologist | Pasadena, CA |
| 1578782173 | Wei-Chin Hwang | Individual | Clinical Psychologist | Pasadena, CA |
| 1699979906 | Melissa Johnson | Individual | Clinical Child & Adolescent Psychologist | Pasadena, CA |
Verify this record
Cross-check NPI 1881817864 against the authoritative CMS record: view Dr. Silvina Alejandra Irwin 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
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.