Michael Fong, M.D.
NPI 1235217084 · Internal Medicine Physician · Union City, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Fong, M.D. is a Internal Medicine Physician provider in Union City, CA (NPI 1235217084).
Provider details
- NPI number
- 1235217084
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G64486 (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
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
- 2006-11-01
- Last updated
- 2015-05-22
Frequently asked questions
- What is Michael Fong's NPI number?
- Michael Fong's National Provider Identifier (NPI) is 1235217084, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Fong's specialty?
- Michael Fong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Fong located?
- Michael Fong's practice location on file with NPPES is 3553 Whipple Rd, Union City, CA 94587-1507.
- What is Michael Fong's phone number?
- The practice phone number listed in the NPPES registry for Michael Fong is (510) 454-1000.
- Does Michael Fong accept Medicare?
- Michael Fong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Fong's NPI active?
- Yes — Michael Fong's NPI (1235217084) is active in the NPPES registry as of the last update on 2015-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.