Douglas Zlock, M.D.
NPI 1427082692 · Internal Medicine Physician · Walnut Creek, CA
Douglas Zlock, M.D. is a Internal Medicine Physician provider in Walnut Creek, CA (NPI 1427082692).
Provider details
- NPI number
- 1427082692
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G68305 (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
- 2006-07-11
- Last updated
- 2014-04-02
Frequently asked questions
- What is Douglas Zlock's NPI number?
- Douglas Zlock's National Provider Identifier (NPI) is 1427082692, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Zlock's specialty?
- Douglas Zlock is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Zlock located?
- Douglas Zlock's practice location on file with NPPES is 1450 Treat Blvd, Walnut Creek, CA 94597-2168.
- What is Douglas Zlock's phone number?
- The practice phone number listed in the NPPES registry for Douglas Zlock is (925) 296-9740.
- Is Douglas Zlock's NPI active?
- Yes — Douglas Zlock's NPI (1427082692) is active in the NPPES registry as of the last update on 2014-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.