Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Holly Marie Costar, PH.D.

Q: What is the NPI number for Holly Costar?

The National Provider Identifier (NPI) for Holly Costar is 1245476738, a Type 1 (individual) record in the CMS NPPES registry.

Counseling Psychologist in Bangor, ME · enumerated 2009.

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

National Provider Identifier

1245476738

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Registry record

Entity type Individual (Type 1)

Name Dr. Holly Marie Costar

Credential PH.D.

Sex Female

Practice address Bangor, ME, 04401

Phone (207) 517-0017

Enumeration date Jan 5, 2009

Last updated in NPPES Oct 24, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License PS1281 (ME) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Holly Costar?

The National Provider Identifier (NPI) for Holly Costar is 1245476738, a Type 1 (individual) record in the CMS NPPES registry.

Where does Holly Costar practice?

The practice location on file with NPPES is in Bangor, ME. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-24.