Michael Stacey, M.D.
NPI 1336120344 · Family Medicine Physician · Union City, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Stacey, M.D. is a Family Medicine Physician provider in Union City, CA (NPI 1336120344).
Provider details
- NPI number
- 1336120344
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A101385 (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
20 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
- 2005-11-07
- Last updated
- 2026-04-13
- Certified
- 2026-04-13
Frequently asked questions
- What is Michael Stacey's NPI number?
- Michael Stacey's National Provider Identifier (NPI) is 1336120344, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Stacey's specialty?
- Michael Stacey is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Stacey located?
- Michael Stacey's practice location on file with NPPES is 33255 9th St, Union City, CA 94587-2137.
- What is Michael Stacey's phone number?
- The practice phone number listed in the NPPES registry for Michael Stacey is (510) 471-5888.
- Does Michael Stacey accept Medicare?
- Michael Stacey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Stacey's NPI active?
- Yes — Michael Stacey's NPI (1336120344) is active in the NPPES registry as of the last update on 2026-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.