Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Calvin Mills, ETS, GCDF
Specialist in Grand Rapids, MI · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861886657
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Registry record
Entity type Individual (Type 1)
Name Calvin Mills
Credential ETS, GCDF
Sex Male
Practice address 1131 Ionia Ave Nw, Grand Rapids, MI, 49503
Phone (616) 259-7900
Fax (616) 259-7909
Enumeration date Mar 19, 2015
Last updated in NPPES Mar 19, 2015
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 Calvin Mills practice?
The practice location on file with NPPES is in Grand Rapids, MI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Calvin Mills?
The National Provider Identifier (NPI) for Calvin Mills is 1861886657, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-03-19.