Diem Nguyen, PSY.D.
NPI 1265715668 · Clinical Psychologist · Philadelphia, PA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diem Nguyen, PSY.D. is a Clinical Psychologist provider in Philadelphia, PA (NPI 1265715668).
Provider details
- NPI number
- 1265715668
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY31927 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs 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
Mailing address
Registry dates
- Enumerated
- 2011-09-21
- Last updated
- 2023-04-22
- Certified
- 2023-04-22
Frequently asked questions
- What is Diem Nguyen's NPI number?
- Diem Nguyen's National Provider Identifier (NPI) is 1265715668, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diem Nguyen's specialty?
- Diem Nguyen is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Diem Nguyen located?
- Diem Nguyen's practice location on file with NPPES is 1501 Locust St Unit 502, Philadelphia, PA 19102-3722.
- What is Diem Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Diem Nguyen is (323) 510-7252.
- Does Diem Nguyen accept Medicare?
- Diem Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diem Nguyen's NPI active?
- Yes — Diem Nguyen's NPI (1265715668) is active in the NPPES registry as of the last update on 2023-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.