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

Mrs. Karen Shields Mayo, FNP-BC

Individual provider Oncology Registered Nurse · NPI 1144521758

Mrs. Karen Shields Mayo, FNP-BC is an Oncology Registered Nurse in Mather, California. Licensed in California. Registered with an NPI since 2010.

Licensed in
CA
In the registry since
2010
Specialties on file
2
What do these letters mean?
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

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Practice location Address checks out

10535 Hospital Way VA Medical Center - Hematology/oncology
Mather, CA 95655
Phone: (916) 843-7008
Fax: (916) 843-7088
Show map & directions

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

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence NP20347 (CA)
Oncology Registered Nurse Taxonomy 163WX0200X · Licence RN426218 (CA)

Record details

NPI number1144521758
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BC
Sole proprietorNo
NPI enumeratedNovember 12, 2010
Last updated in NPPESNovember 12, 2010