Dr. Robert Frank Mannis, PHD
Dr. Robert Frank Mannis is a Psychologist provider (Psychologist) practicing in Frederick, MD, registered in the NPPES registry with NPI 1831224906 since 2007. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1831224906 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Robert Frank Mannis |
| Credential | PHD |
| Sex | Male |
| Practice address | Frederick, MD, 21701 |
| Phone | 3016624160 |
| Fax | 3016204344 |
| Enumeration date | 2007-02-22 |
| Last updated in NPPES | 2011-10-31 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103T00000X | Psychologist | Secondary | 02233 | MD |
| 103T00000X | Psychologist | Primary | 2233 | MD |
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: Robert Mannis, PHD NPI: 1831224906 Taxonomy: 103T00000X (Psychologist) Address: Frederick, MD, 21701
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Cross-check NPI 1831224906 against the authoritative CMS record: view Dr. Robert Frank Mannis 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 2026-07-10. Provider record last updated 2011-10-31.