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

Dr. Michael Grotjahn, MD

Individual provider Psychiatry Physician · NPI 1649475450

Dr. Michael Grotjahn, MD is a Psychiatry Physician in Mill Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
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

45 Camino Alto Ave 200
Mill Valley, CA 94941
Phone: (415) 302-9640
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence G13559 (CA)

Record details

NPI number1649475450
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 20, 2007
Last updated in NPPESJuly 8, 2007
Mailing addressPo Box 2609, Mill Valley, CA 94942-2609

Other providers in Mill Valley