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

Dr. Aaron Renee Gillen, DMFT, AMFT, CMT

Q: What is the NPI number for Aaron Gillen?

The National Provider Identifier (NPI) for Aaron Gillen is 1255576534, a Type 1 (individual) record in the CMS NPPES registry.

Marriage & Family Therapist in Encinitas, CA · enumerated 2008.

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

National Provider Identifier

1255576534

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Renee Gillen

Credential DMFT, AMFT, CMT

Sex Female

Practice address Encinitas, CA, 92024

Phone (760) 638-2595

Enumeration date Dec 15, 2008

Last updated in NPPES Sep 16, 2024

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

Taxonomy & licenses

405300000X Prevention Professional Other Service Providers · License AMFT144579 (CA) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License AMFT144579 (CA) Primary

133NN1002X Nutrition Education Nutritionist Dietary & Nutritional Service Providers · License AMFT144579 (CA) Secondary

172M00000X Mechanotherapist Other Service Providers · License MA60055729 (WA) Secondary

225700000X Massage Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License CMT91063 (CA) Secondary

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 Aaron Gillen?

The National Provider Identifier (NPI) for Aaron Gillen is 1255576534, a Type 1 (individual) record in the CMS NPPES registry.

Where does Aaron Gillen practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-16.