Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Catherine Mammoser, MHC
Counselor in Fredonia, NY · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336798818
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Registry record
Entity type Individual (Type 1)
Name Catherine Mammoser
Credential MHC
Sex Female
Practice address 33 Church St, Fredonia, NY, 14063
Phone (844) 675-1348
Enumeration date Sep 8, 2019
Last updated in NPPES Sep 8, 2019
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
What specialty is Catherine Mammoser?
Catherine Mammoser is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all → David Holt Social Worker · Fredonia, NY NPI 1073585220 Linda Mccormick Registered Nurse · Fredonia, NY NPI 1235449141 Tiffany Amidon Registered Nurse · Fredonia, NY NPI 1235845694 Alissa Conyer Counselor · Fredonia, NY NPI 1912608738 Kasey Wilfong Case Manager/Care Coordinator · Fredonia, NY NPI 1851084792
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-09-08.