Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory Morris Pfeffer
Counselor in Fenton, MO · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1952070963
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Registry record
Entity type Individual (Type 1)
Name Gregory Morris Pfeffer
Sex Male
Practice address 320 Gravois Rd, Fenton, MO, 63026
Phone (636) 243-8575
Enumeration date Sep 13, 2021
Last updated in NPPES Sep 13, 2021
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
Where does Gregory Pfeffer practice?
The practice location on file with NPPES is in Fenton, MO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gregory Pfeffer?
The National Provider Identifier (NPI) for Gregory Pfeffer is 1952070963, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-13.