What is Justine Duyst's NPI number?

Justine Duyst's National Provider Identifier (NPI) is 1639961964, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Justine Duyst's specialty?

Justine Duyst is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).

Where is Justine Duyst located?

Justine Duyst's practice location on file with NPPES is 416 Santa Paula Ave, Pasadena, CA 91107-2931.

What is Justine Duyst's phone number?

The practice phone number listed in the NPPES registry for Justine Duyst is (559) 991-5750.

Is Justine Duyst's NPI active?

Yes — Justine Duyst's NPI (1639961964) is active in the NPPES registry as of the last update on 2025-05-21.

IndividualActive

Justine Duyst, PSYD

NPI 1639961964 · Clinical Psychologist · Pasadena, CA

Justine Duyst, PSYD is a Clinical Psychologist provider in Pasadena, CA (NPI 1639961964).

Provider details

NPI number: 1639961964
Entity type: Individual
Primary specialty: Clinical PsychologistBehavioral Health & Social Service Providers
Credential: PSYD
Sex: Female
Sole proprietor: No
License: PSY35549 (CA)

Specialties & taxonomies

Clinical PsychologistPrimary103TC0700XLicense PSY35549 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(54/100 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

416 Santa Paula Ave

Pasadena, CA 91107-2931

Phone: (559) 991-5750

Street-level locationGet directions

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Mailing address