Dr. Roger Nguyen, a Corporation
NPI 1821513870 · Allergy & Immunology Physician · Garden Grove, CA
Dr. Roger Nguyen, a Corporation is a Allergy & Immunology Physician organization in Garden Grove, CA (NPI 1821513870).
Provider details
- NPI number
- 1821513870
- Entity type
- Organization
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Roger Nguyen, Owner(714) 638-4433
- License
- A68125 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 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
- 2017-08-10
- Last updated
- 2017-08-10
Frequently asked questions
- What is Dr. Roger Nguyen, a Corporation's NPI number?
- Dr. Roger Nguyen, a Corporation's National Provider Identifier (NPI) is 1821513870, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Dr. Roger Nguyen, a Corporation?
- Dr. Roger Nguyen, a Corporation is classified in the NPPES registry as Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Dr. Roger Nguyen, a Corporation located?
- Dr. Roger Nguyen, a Corporation's practice location on file with NPPES is 9746 Westminster Ave Ste a, Garden Grove, CA 92844-2984.
- What is Dr. Roger Nguyen, a Corporation's phone number?
- The practice phone number listed in the NPPES registry for Dr. Roger Nguyen, a Corporation is (714) 638-4433.
- Who is the authorized official for Dr. Roger Nguyen, a Corporation?
- The authorized official listed on Dr. Roger Nguyen, a Corporation's NPPES record is Roger Nguyen, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Dr. Roger Nguyen, a Corporation's NPI active?
- Yes — Dr. Roger Nguyen, a Corporation's NPI (1821513870) is active in the NPPES registry as of the last update on 2017-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.