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

Mark R Alejandro, RN

Individual provider Registered Nurse · NPI 1912825688

Mark R Alejandro, RN is a Registered Nurse in Castro Valley, California. Licensed in California. Registered with an NPI since 2026.

Licensed in
CA
In the registry since
2026
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

See every abbreviation used in this directory →

Practice location Address checks out

15200 Foothill Blvd
Castro Valley, CA 94578-1013
Phone: (510) 352-9690
Show map & directions

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

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence 95356222 (CA)

Record details

NPI number1912825688
Entity typeIndividual (Type 1)
GenderMale
Credentials RN
Sole proprietorNo
NPI enumeratedJuly 8, 2026
Last updated in NPPESJuly 8, 2026
Certification dateJuly 9, 2026
Mailing address764 Portola Way Unit 102, Napa, CA 94559-3041

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