MR. MARK ROBERT THIELEN MFT
NPI 1851545099
Marriage & Family Therapist in Grass Valley, CA

Q: What is Mark Thielen's NPI number?

The NPI number for Mark Thielen is 1851545099. It was assigned to this individual provider in the NPPES registry on November 14, 2008.

Q: What is Mark Thielen's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Thielen was last updated on November 14, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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 November 14, 2008

698 WHITING ST, SUITE D, GRASS VALLEY, CA 95945(530) 271-7266(530) 477-7822 Get Directions Write a Review

NPPES record last updated: November 14, 2008. Verified against the NPPES registry weekly; last sync: September 13, 2026.

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About Mr. Mark Robert Thielen Mft NPPES

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

MR. MARK ROBERT THIELEN MFT (NPI 1851545099) is an individual marriage & family therapist in Grass Valley, California, licensed in California (45180) and active in the NPI registry since November 2008.

NPPES Registry Identity

NPI1851545099

Entity TypeIndividualMale

Primary Taxonomy106H00000X

Provider Legal NameMR. MARK ROBERT THIELENCredential: MFT

Location Address698 WHITING ST, SUITE DGrass Valley, CA 95945-7568

Mailing Address698 Whiting St., Suite DGrass Valley, CA 95946 · (530) 271-7266 · Fax (530) 477-7822

Phone(530) 271-7266

Fax(530) 477-7822

Sole ProprietorYes

Enumeration DateNovember 14, 2008

✔ NPI 1851545099 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers

Taxonomy Code106H00000X

License✔ Licensed in CA · 45180

Definition

A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.

698 WHITING ST, Grass Valley, CA 95945

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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 Mark Thielen's NPI number?

The NPI number for Mark Thielen is 1851545099. It was assigned to this individual provider in the NPPES registry on November 14, 2008.

Where is Mark Thielen located?

Mark Thielen practices at 698 Whiting St Suite D, Grass Valley, CA 95945. The listed phone number is (530) 271-7266.

What is Mark Thielen's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

When was this NPI record last updated?

The NPPES record for Mark Thielen was last updated on November 14, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.