Dwight Guan, MD
NPI 1184644676 · Family Medicine Physician · Upland, CA
Dwight Guan, MD is a Family Medicine Physician provider in Upland, CA (NPI 1184644676).
Provider details
- NPI number
- 1184644676
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G59004 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2006-07-20
- Last updated
- 2025-09-11
Frequently asked questions
- What is Dwight Guan's NPI number?
- Dwight Guan's National Provider Identifier (NPI) is 1184644676, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dwight Guan's specialty?
- Dwight Guan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dwight Guan located?
- Dwight Guan's practice location on file with NPPES is 999 San Bernardino Rd, Upland, CA 91786-4920.
- What is Dwight Guan's phone number?
- The practice phone number listed in the NPPES registry for Dwight Guan is (909) 985-2811.
- Is Dwight Guan's NPI active?
- Yes — Dwight Guan's NPI (1184644676) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.