Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Ralph Edwin Landefeld, PH.D.
Psychologist in Meadville, PA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1073557138
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Registry record
Entity type Individual (Type 1)
Name Dr. Ralph Edwin Landefeld
Credential PH.D.
Sex Male
Practice address 10159 Nancy Dr, Meadville, PA, 16335
Phone (724) 601-4901
Fax (814) 336-5388
Enumeration date Jun 16, 2006
Last updated in NPPES Oct 5, 2010
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License PS002990-L (PA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0146700 | Medicaid | PA | - |
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.
Frequently asked questions
What is the NPI number for Ralph Landefeld?
The National Provider Identifier (NPI) for Ralph Landefeld is 1073557138, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ralph Landefeld practice?
The practice location on file with NPPES is in Meadville, PA. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-05.