Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marilyn L Rosi, FNP
Nurse Practitioner in Grayling, MI · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1942478797
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Registry record
Entity type Individual (Type 1)
Name Marilyn L Rosi
Credential FNP
Sex Female
Practice address 1010 W. North Down River Road, Grayling, MI, 49738
Phone (989) 348-7671
Fax (989) 348-8414
Enumeration date Feb 14, 2008
Last updated in NPPES Jan 7, 2016
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4704114965 (MI) Primary
FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan.
About the FNP credential
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 Marilyn Rosi?
Marilyn Rosi 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-07.