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WILLIAM SHERWIN
NPI 1780848374
Marriage & Family Therapist in Rancho Santa Margarita, CA

Active since July 14, 2008
42 CALLE VERANO, RANCHO SANTA MARGARITA, CA 92688(415) 940-5221 Get Directions Write a Review

NPPES record last updated: September 25, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William Sherwin NPPES

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

WILLIAM SHERWIN (NPI 1780848374) is an individual marriage & family therapist in Rancho Santa Margarita, California, licensed in California (49178) and active in the NPI registry since July 2008.

NPPES Registry Identity

NPI1780848374
Entity TypeIndividualMale
Primary Taxonomy106H00000X
Provider Legal NameWILLIAM SHERWIN
Location Address42 CALLE VERANORancho Santa Margarita, CA 92688-2647
Mailing Address1628 W 25th StLos Angeles, CA 90007-1528 · (415) 940-5221
Phone(415) 940-5221
Sole ProprietorYes
Enumeration DateJuly 14, 2008
Last NPPES UpdateSeptember 25, 2025
NPPES CertifiedSeptember 25, 2025
✔ NPI 1780848374 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 · 49178
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.
42 CALLE VERANO, Rancho Santa Margarita, CA 92688
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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 William Sherwin's NPI number?

The NPI number for William Sherwin is 1780848374. It was assigned to this individual provider in the NPPES registry on July 14, 2008.

Where is William Sherwin located?

William Sherwin practices at 42 Calle Verano, Rancho Santa Margarita, CA 92688. The listed phone number is (415) 940-5221.

What is William Sherwin'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 William Sherwin was last updated on September 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.