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

Individual provider Internal Medicine Physician · NPI 1992703706

Timothy Louis Gieseke, MD is an Internal Medicine in Santa Rosa, California. Graduated from University of California, Irvine, California College of Medicine in 1976, 50 years ago. Licensed in California.

Years since qualifying
50
Trained at
University of California, Irvine, California College of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3536 Mendocino Ave 300
Santa Rosa, CA 95403-3634
Phone: (707) 546-2180
Fax: (707) 546-2188
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G34398 (CA)

Record details

NPI number1992703706
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 14, 2005
Last updated in NPPESFebruary 7, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE
Graduated 1976 (50 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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