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Eileen Kollmer Mills

Mental Health Counselor in Acton, MA · enumerated 2015.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336520477

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Registry record

Entity type Individual (Type 1)
Name Eileen Kollmer Mills
Sex Female
Practice address 360 Massachusetts Ave, Acton, MA, 01720
Phone (978) 263-3427
Enumeration date Jun 15, 2015
Last updated in NPPES Jun 15, 2015

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers 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.

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Frequently asked questions

Where does Eileen Mills practice?
The practice location on file with NPPES is in Acton, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Eileen Mills?
The National Provider Identifier (NPI) for Eileen Mills is 1336520477, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-15.