Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mary G Mattison-Wynn, PSY D LP
Psychologist in Buffalo, MN · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649202755
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Registry record
Entity type Individual (Type 1)
Name Mary G Mattison-Wynn
Credential PSY D LP
Sex Female
Practice address 30 1st Ave Ne # 12, Buffalo, MN, 55313
Phone (612) 670-8918
Fax (952) 300-8194
Enumeration date Jul 7, 2006
Last updated in NPPES Sep 30, 2024
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 4961 (MN) Secondary
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 Mary Mattison-Wynn?
Mary Mattison-Wynn 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 2024-09-30.