Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Douglas W Zlock, MD

Individual provider Internal Medicine Physician · NPI 1427082692

Dr. Douglas W Zlock, MD is an Internal Medicine Physician in Walnut Creek, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1450 Treat Blvd Ste 250A
Walnut Creek, CA 94597-2168
Phone: (925) 296-9740
Fax: (925) 296-9062
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G68305 (CA)

Record details

NPI number1427082692
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 11, 2006
Last updated in NPPESApril 2, 2014

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