John Richard Harsh, PHD
John Richard Harsh is a Psychologist provider (Psychologist) practicing in Hattiesburg, MS, registered in the NPPES registry with NPI 1164559639 since 2007. The credential PHD stands for Doctor of Philosophy. Practices at Hattiesburg Clinic PA (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1164559639 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John Richard Harsh |
| Credential | PHD |
| Sex | Male |
| Practice address | 101 COURTENAY CIR, Hattiesburg, MS, 39402 |
| Phone | 6015795180 |
| Enumeration date | 2007-02-28 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103T00000X | Psychologist | Primary | — | — |
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: John Harsh, PHD NPI: 1164559639 Taxonomy: 103T00000X (Psychologist) Address: 101 COURTENAY CIR, Hattiesburg, MS, 39402
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1831251925 | Hattiesburg Clinic PA | Organization | Sleep Disorder Diagnostic Clinic/Center | Hattiesburg, MS |
| 1275934580 | Gilbert Luckel | Individual | Acute Care Nurse Practitioner | Hattiesburg, MS |
| 1760841142 | Brandi Williams | Individual | Family Nurse Practitioner | Hattiesburg, MS |
Verify this record
Cross-check NPI 1164559639 against the authoritative CMS record: view John Richard Harsh 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.