Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Danna, PH.D.
Psychologist in North Potomac, MD · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699102053
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Registry record
Entity type Individual (Type 1)
Name Dr. John Danna
Credential PH.D.
Sex Male
Practice address 14405 Kings Grant St, North Potomac, MD, 20878
Phone (240) 388-5720
Enumeration date Oct 1, 2013
Last updated in NPPES Sep 3, 2021
Taxonomy & licenses
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
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 John Danna?
John Danna 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-03.