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

Dr. Katherine S Yost, PHD, LMFT

Individual provider Marriage & Family Therapist · NPI 1962551747

Dr. Katherine S Yost, PHD, LMFT is a Marriage & Family Therapist in Rancho Santa Margarita, California. Practices as a sole proprietor. Licensed in New Jersey and Washington.

Licensed in
NJ, WA
In the registry since
2007
Specialties on file
3
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.
LMFT — Licensed Marriage and Family Therapist
A therapist licensed to treat couples and families.

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Practice location Address checks out

39 Calle Del Sur
Rancho Santa Margarita, CA 92688-2917
Phone: (425) 405-0494
Fax: (877) 848-4831
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Specialties & licences

Marriage & Family Therapist (primary) Taxonomy 106H00000X · Licence LF 60034433 (WA)
Marriage & Family Therapist Taxonomy 106H00000X · Licence LF60034433 (WA)
Marriage & Family Therapist Taxonomy 106H00000X · Licence F100779 (NJ)

Record details

NPI number1962551747
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD , LMFT
Sole proprietorYes
NPI enumeratedJanuary 9, 2007
Last updated in NPPESMay 2, 2024
Certification dateMay 2, 2024

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