Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marianne Guthrie
Nurse Practitioner in O Fallon, IL · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1609313758
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Registry record
Entity type Individual (Type 1)
Name Marianne Guthrie
Sex Female
Practice address 3 Saint Elizabeth Blvd Ste 200, O Fallon, IL, 62269
Phone (618) 234-2120
Enumeration date Jan 27, 2017
Last updated in NPPES Dec 29, 2021
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209015404 (IL) Primary
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 Marianne Guthrie?
Marianne Guthrie is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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 →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-29.