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

Dr. Timothy Patrick Callahan, DDS

Individual provider General Practice Dentistry · NPI 1275633836

Dr. Timothy Patrick Callahan, DDS is a General Practice Dentistry in Walnut Creek, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Practice location Address checks out

1801 Oakland Blvd Ste 120
Walnut Creek, CA 94596-7001
Phone: (925) 947-0616
Show map & directions

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

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence 30364 (CA)

Record details

NPI number1275633836
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedSeptember 24, 2006
Last updated in NPPESJuly 8, 2007
Mailing address1801 Oakland Blvd Ste 120, Walnut Creek, CA 94596-7001

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