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

Mrs. Mary Kathleen Ryken, RN

Individual provider Registered Nurse · NPI 1023581766

Mrs. Mary Kathleen Ryken, RN is a Registered Nurse in Castro Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2019
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

2269 Vegas Ave
Castro Valley, CA 94546-6358
Phone: (510) 693-4586
Show map & directions

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

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence 271315 (CA)

Record details

NPI number1023581766
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN
Sole proprietorYes
NPI enumeratedJanuary 4, 2019
Last updated in NPPESJanuary 4, 2019

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