Dr. Mark B Siegert, PHD
Dr. Mark B Siegert is a Clinical Psychologist provider (Psychologist) practicing in Millburn, NJ, registered in the NPPES registry with NPI 1609897966 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1609897966 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark B Siegert |
| Credential | PHD |
| Sex | Male |
| Practice address | 95 MAIN ST, SUITE 201, Millburn, NJ, 07041 |
| Phone | 9732580390 |
| Fax | 9732580371 |
| Enumeration date | 2006-07-22 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Primary | 35S100266700 | NJ |
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: Mark Siegert, PHD NPI: 1609897966 Taxonomy: 103TC0700X (Clinical Psychologist) Address: 95 MAIN ST, SUITE 201, Millburn, NJ, 07041
Verify this record
Cross-check NPI 1609897966 against the authoritative CMS record: view Dr. Mark B Siegert 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 2007-07-08.