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

MS. Margaret A Johnstone, RNNP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1134229347

MS. Margaret A Johnstone, RNNP is a Psychiatric/Mental Health Nurse Practitioner in Concord, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006

Practice location Address checks out

2740 Grant St
Concord, CA 94520-2265
Phone: (925) 285-5431
Fax: (925) 847-5599
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 14501 (CA)

Record details

NPI number1134229347
Entity typeIndividual (Type 1)
GenderFemale
Credentials RNNP
Sole proprietorNo
NPI enumeratedSeptember 25, 2006
Last updated in NPPESApril 30, 2013

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