Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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MS. Penelope Holstein Mercer, MA, LMFT

Individual provider Marriage & Family Therapist · NPI 1093176216

MS. Penelope Holstein Mercer, MA, LMFT is a Marriage & Family Therapist in Imperial Beach, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2016
What do these letters mean?
MA — Master of Arts
A graduate arts degree.
LMFT — Licensed Marriage and Family Therapist
A therapist licensed to treat couples and families.

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Practice location Address checks out

257 Elder Ave
Imperial Beach, CA 91932-2409
Phone: (619) 316-2107
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Marriage & Family Therapist (primary) Taxonomy 106H00000X · Licence 131474 (CA)

Record details

NPI number1093176216
Entity typeIndividual (Type 1)
GenderFemale
Credentials MA , LMFT
Sole proprietorYes
NPI enumeratedMarch 16, 2016
Last updated in NPPESMarch 4, 2022
Certification dateMarch 4, 2022

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