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MARISA SOMMERHALDER AMFT
NPI 1194448274
Counselor - Mental Health in Walnut Creek, CA

Active since September 22, 2022
35 QUAIL CT STE 102, WALNUT CREEK, CA 94596(925) 899-8857 Get Directions Write a Review

NPPES record last updated: January 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 27, 2026, Sep 22, 2022 (2 updates tracked since 2022).

About Marisa Sommerhalder Amft NPPES

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

MARISA SOMMERHALDER AMFT (NPI 1194448274) is an individual mental health provider in Walnut Creek, California and active in the NPI registry since September 2022.

NPPES Registry Identity

NPI1194448274
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameMARISA SOMMERHALDERCredential: AMFT
Location Address35 QUAIL CT STE 102Walnut Creek, CA 94596-5590
Mailing Address783 Diablo RdDanville, CA 94526-2731 · (925) 899-8857
Phone(925) 899-8857
Sole ProprietorYes
Enumeration DateSeptember 22, 2022
Last NPPES UpdateJanuary 27, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 27, 2026
✔ NPI 1194448274 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
35 QUAIL CT STE 102, Walnut Creek, CA 94596
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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 Marisa Sommerhalder's NPI number?

The NPI number for Marisa Sommerhalder is 1194448274. It was assigned to this individual provider in the NPPES registry on September 22, 2022.

Where is Marisa Sommerhalder located?

Marisa Sommerhalder practices at 35 Quail Ct Ste 102, Walnut Creek, CA 94596. The listed phone number is (925) 899-8857.

What is Marisa Sommerhalder's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Marisa Sommerhalder was last updated on January 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.