DR. MICHAEL GROTJAHN M.D.
NPI 1649475450
Psychiatry & Neurology - Psychiatry in Mill Valley, CA

Q: What is Michael Grotjahn's NPI number?

The NPI number for Michael Grotjahn is 1649475450. It was assigned to this individual provider in the NPPES registry on June 20, 2007. The provider is also known as Dr. Michael Grotjahn M.D..

Q: What is Michael Grotjahn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Michael Grotjahn was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 20, 2007

45 CAMINO ALTO AVE, 200, MILL VALLEY, CA 94941(415) 302-9640 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Michael Grotjahn M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MICHAEL GROTJAHN M.D. (NPI 1649475450) is an individual psychiatry provider in Mill Valley, California, licensed in California (G13559) and active in the NPI registry since June 2007.

NPPES Registry Identity

NPI1649475450

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDR. MICHAEL GROTJAHNCredential: M.D.

Location Address45 CAMINO ALTO AVE, 200Mill Valley, CA 94941

Mailing AddressPo Box 2609Mill Valley, CA 94942-2609 · (415) 302-9640

Phone(415) 302-9640

Sole ProprietorYes

Enumeration DateJune 20, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1649475450 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · G13559

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

45 CAMINO ALTO AVE, Mill Valley, CA 94941

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Other Names 1

Professional Name (2)Dr. Michael Grotjahn M.d.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michael Grotjahn's NPI number?

The NPI number for Michael Grotjahn is 1649475450. It was assigned to this individual provider in the NPPES registry on June 20, 2007. The provider is also known as Dr. Michael Grotjahn M.D..

Where is Michael Grotjahn located?

Michael Grotjahn practices at 45 Camino Alto Ave 200, Mill Valley, CA 94941. The listed phone number is (415) 302-9640.

What is Michael Grotjahn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

When was this NPI record last updated?

The NPPES record for Michael Grotjahn was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.