What is Lisa Diaz's NPI number?

Lisa Diaz's National Provider Identifier (NPI) is 1659177343, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Lisa Diaz's specialty?

Lisa Diaz is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).

Where is Lisa Diaz located?

Lisa Diaz's practice location on file with NPPES is 3281 E Guasti Rd # 713, Ontario, CA 91761-7622.

What is Lisa Diaz's phone number?

The practice phone number listed in the NPPES registry for Lisa Diaz is (909) 600-8134.

Is Lisa Diaz's NPI active?

Yes — Lisa Diaz's NPI (1659177343) is active in the NPPES registry as of the last update on 2025-09-12.

IndividualActive

Lisa Diaz, AMFT

NPI 1659177343 · Marriage & Family Therapist · Ontario, CA

Lisa Diaz, AMFT is a Marriage & Family Therapist provider in Ontario, CA (NPI 1659177343).

Provider details

NPI number: 1659177343
Entity type: Individual
Primary specialty: Marriage & Family TherapistBehavioral Health & Social Service Providers
Credential: AMFT
Sex: Female
Sole proprietor: Yes
License: 153089 (CA)

Specialties & taxonomies

Marriage & Family TherapistPrimary106H00000XLicense 153089 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(55/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

3281 E Guasti Rd # 713

Ontario, CA 91761-7622

Phone: (909) 600-8134

Street-level locationGet directions

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Mailing address