Dr. Gregory Harry Powell, PHD
Dr. Gregory Harry Powell is a Psychologist provider (Psychologist) practicing in Frederick, MD, registered in the NPPES registry with NPI 1598737629 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1598737629 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Gregory Harry Powell |
| Credential | PHD |
| Sex | Male |
| Practice address | 97 THOMAS JOHNSON DR, STE 202, Frederick, MD, 21702 |
| Phone | 3016956455 |
| Fax | 3016956456 |
| Enumeration date | 2006-02-02 |
| Last updated in NPPES | 2023-09-06 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103T00000X | Psychologist | Primary | 2236 | 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: Gregory Powell, PHD NPI: 1598737629 Taxonomy: 103T00000X (Psychologist) Address: 97 THOMAS JOHNSON DR, STE 202, Frederick, MD, 21702
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1205827664 | Frederick Cardiovascular Care PC | Organization | Cardiovascular Disease Physician | Frederick, MD |
| 1144202995 | Edwin Chen | Individual | Obstetrics & Gynecology Physician | Frederick, MD |
| 1932181781 | Debra Acerenza | Individual | Obstetrics & Gynecology Physician | Frederick, MD |
| 1265414023 | Obgyn Center of Frederick, P.A. | Organization | Obstetrics & Gynecology Physician | Frederick, MD |
| 1154393270 | Kevin Lawlor | Individual | Psychologist | Frederick, MD |
| 1235101361 | Timothy Gibian | Individual | Psychologist | Frederick, MD |
| 1164494282 | Cynthia Eaves | Individual | Psychologist | Frederick, MD |
| 1588685465 | Frederick Psychology Center LLC | Organization | Mental Health Clinic/Center (Including Community Mental Health Center) | Frederick, MD |
Verify this record
Cross-check NPI 1598737629 against the authoritative CMS record: view Dr. Gregory Harry Powell 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 2023-09-06.