Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Gail Mills, MA

School Counselor in Flagstaff, AZ · enumerated 2007.

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

National Provider Identifier

1598987901

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Registry record

Entity type Individual (Type 1)

Name Ms. Gail Mills

Credential MA

Sex Female

Practice address 400 W Elm Ave, Flagstaff, AZ, 86001

Phone (928) 773-8120

Fax (928) 773-8123

Enumeration date May 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

101YS0200X School 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

Is NPI 1598987901 active?

Yes, as of the latest NPPES snapshot, NPI 1598987901 is active (record last updated 2007-07-08).

How do I verify Gail Mills's NPI record?

Cross-check NPI 1598987901 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.