Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mariellen M Synan
Health Educator in Gwynn Oak, MD · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1396476149
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Registry record
Entity type Individual (Type 1)
Name Mariellen M Synan
Sex Female
Practice address 4801 Liberty Heights Ave, Gwynn Oak, MD, 21207
Phone (410) 468-2124
Enumeration date Jun 22, 2022
Last updated in NPPES Jun 22, 2022
Taxonomy & licenses
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 Mariellen Synan?
Mariellen Synan is registered in NPPES with the primary taxonomy of Health Educator. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-22.