Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Donald Unger, PHD
Psychologist in Wilmington, DE · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629177563
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Registry record
Entity type Individual (Type 1)
Name Mr. Donald Unger
Credential PHD
Sex Male
Practice address 1521 Concord Pike, Suite 103, Wilmington, DE, 19803
Phone (302) 428-0205
Fax (302) 428-1123
Enumeration date Sep 21, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License B10000217 (DE) 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 |
|---|---|---|---|
| 173122 | Other | DE | COMPSYCH |
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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Donald Unger?
Donald Unger is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Kelly Cunningham Professional Counselor · Wilmington, DE NPI 1710947536 Ann Rogerson Social Worker · Wilmington, DE NPI 1194824045 Kathryn Bove Psychologist · Wilmington, DE NPI 1518066463 Sharon Metaxas Social Worker · Wilmington, DE NPI 1699873596 Dorothy Rawley Psychologist · Wilmington, DE NPI 1588762470 Sharon Jacobs Psychologist · Wilmington, DE NPI 1518066455 Hilna Moskowitz Psychologist · Wilmington, DE NPI 1952400897 Marilynn Denn Counselor · Wilmington, DE NPI 1760581615
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.