Henry Hao Nguyen, D.O.
NPI 1669713780 · Internal Medicine Physician · Downey, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Henry Hao Nguyen, D.O. is a Internal Medicine Physician provider in Downey, CA (NPI 1669713780).
Provider details
- NPI number
- 1669713780
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A12223 (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
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 9333 Imperial HwyDowney, CA 90242-2812Phone: (800) 823-4040
- 9410 Sabre LnWestminster, CA 92683Phone: (714) 902-7706
Registry dates
- Enumerated
- 2013-03-14
- Last updated
- 2022-07-21
Frequently asked questions
- What is Henry Hao Nguyen's NPI number?
- Henry Hao Nguyen's National Provider Identifier (NPI) is 1669713780, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Henry Hao Nguyen's specialty?
- Henry Hao Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Henry Hao Nguyen located?
- Henry Hao Nguyen's practice location on file with NPPES is 9449 Imperial Hwy, Downey, CA 90242-2814.
- What is Henry Hao Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Henry Hao Nguyen is (800) 823-4040.
- Does Henry Hao Nguyen accept Medicare?
- Henry Hao Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Henry Hao Nguyen's NPI active?
- Yes — Henry Hao Nguyen's NPI (1669713780) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.