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Diem Nguyen
NPI 1750052304 · Behavior Analyst · Ontario, CA
Diem Nguyen is a Behavior Analyst provider in Ontario, CA (NPI 1750052304).
Provider details
- NPI number
- 1750052304
- Entity type
- Individual
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
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
4 yrs in NPPES registry
- Profile completeness38% of score
83% 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
1520 N Mountain Ave, Set 206
Ontario, CA 91762
Phone: (909) 689-4135
Street-level locationGet directions
Mailing address
3626 Arvidson Ct
Chino, CA 91710-4700
Registry dates
- Enumerated
- 2021-09-23
- Last updated
- 2021-09-23
- Certified
- 2021-09-07
Frequently asked questions
- What is Diem Nguyen's NPI number?
- Diem Nguyen's National Provider Identifier (NPI) is 1750052304, 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 Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Diem Nguyen located?
- Diem Nguyen's practice location on file with NPPES is 1520 N Mountain Ave, Set 206, Ontario, CA 91762.
- What is Diem Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Diem Nguyen is (909) 689-4135.
- Is Diem Nguyen's NPI active?
- Yes — Diem Nguyen's NPI (1750052304) is active in the NPPES registry as of the last update on 2021-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.