Helen Stacey, MD
NPI 1821235425 · Internal Medicine Physician · Walnut Creek, CA
Helen Stacey, MD is a Internal Medicine Physician provider in Walnut Creek, CA (NPI 1821235425).
Provider details
- NPI number
- 1821235425
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G85228 (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
17 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
- 2009-01-19
- Last updated
- 2009-01-19
Frequently asked questions
- What is Helen Stacey's NPI number?
- Helen Stacey's National Provider Identifier (NPI) is 1821235425, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Helen Stacey's specialty?
- Helen Stacey is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Helen Stacey located?
- Helen Stacey's practice location on file with NPPES is 2255 Ygnacio Valley Rd, Walnut Creek, CA 94598-3343.
- What is Helen Stacey's phone number?
- The practice phone number listed in the NPPES registry for Helen Stacey is (925) 937-9984.
- Is Helen Stacey's NPI active?
- Yes — Helen Stacey's NPI (1821235425) is active in the NPPES registry as of the last update on 2009-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.