Dr. Ian Donnelly Faerstein, PSY.D.
Dr. Ian Donnelly Faerstein is a Clinical Psychologist provider (Psychologist) practicing in Berkeley, CA, registered in the NPPES registry with NPI 1811246457 since 2012. The credential PSYD stands for Doctor of Psychology. Practices at Eric Stullman Lmft (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1811246457 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Ian Donnelly Faerstein |
| Credential | PSY.D. |
| Sex | Male |
| Practice address | Berkeley, CA, 94704 |
| Phone | 5102963090 |
| Enumeration date | 2012-08-29 |
| Last updated in NPPES | 2021-10-30 |
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 | PSY28785 | CA |
PSYD — Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential
Copy-ready billing details
Provider: Ian Faerstein, PSY.D. NPI: 1811246457 Taxonomy: 103TC0700X (Clinical Psychologist) Address: Berkeley, CA, 94704
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1376542985 | Patricia Ditton | Individual | Psychologist | Berkeley, CA |
| 1780606681 | Eike Diebold | Individual | Psychologist | Berkeley, CA |
| 1346435328 | Susan Bresee | Individual | Clinical Social Worker | Berkeley, CA |
| 1912171307 | Karen Saeger | Individual | Psychologist | Berkeley, CA |
| 1154738615 | Eric Stullman Lmft | Organization | Preferred Provider Organization | Berkeley, CA |
Verify this record
Cross-check NPI 1811246457 against the authoritative CMS record: view Dr. Ian Donnelly Faerstein 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 2021-10-30.