Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark David Ramthun, RDH
Dental Hygienist in Shelby, MI · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1942724612
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Registry record
Entity type Individual (Type 1)
Name Mark David Ramthun
Credential RDH
Sex Male
Practice address 119 S State St, Shelby, MI, 49455
Phone (231) 861-2130
Fax (231) 861-0019
Enumeration date Aug 3, 2017
Last updated in NPPES Aug 3, 2017
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 is the NPI number for Mark Ramthun?
The National Provider Identifier (NPI) for Mark Ramthun is 1942724612, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Ramthun practice?
The practice location on file with NPPES is in Shelby, MI. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Kathy Rosema Family Medicine Physician · Shelby, MI NPI 1689628927 Northwest Michigan Health Services Inc. Federally Qualified Health Center (FQHC) · Shelby, MI NPI 1235208075 Northwest Michigan Health Services, Inc Federally Qualified Health Center (FQHC) · Shelby, MI NPI 1306262258 Shannon Larson Dental Hygienist · Shelby, MI NPI 1558751180 Jonathan Bisson Medical Physician Assistant · Shelby, MI NPI 1306555750 Alicia Harmon Community Health Worker · Shelby, MI NPI 1801650296 Suelema Garcia Community Health Worker · Shelby, MI NPI 1629810338 Amy Ramthun Social Worker · Shelby, MI NPI 1295552792
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-08-03.