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

Ellen M. Castellanos, RN, CPNP

Individual provider Registered Nurse · NPI 1659303345

Ellen M. Castellanos, RN, CPNP is a Registered Nurse in Atascadero, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
CPNP — Certified Pediatric Nurse Practitioner
A nurse practitioner certified in paediatrics.

See every abbreviation used in this directory →

Practice location Address checks out

7700 Morro Rd
Atascadero, CA 93422-4435
Phone: (805) 466-6622
Fax: (805) 461-0361
Show map & directions

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

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence RN 233662 (CA)

Record details

NPI number1659303345
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , CPNP
Sole proprietorNo
NPI enumeratedJuly 6, 2006
Last updated in NPPESJuly 9, 2007

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