Ellen M. Castellanos, RN, CPNP
Registered Nurse · Atascadero, CA
Ellen M. Castellanos, RN, CPNP is a registered nurse with a practice address in Atascadero, California, and NPI 1659303345, issued on Jul 6, 2006. Check the license (California RN 233662, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ellen M. Castellanos
- Credential
- RN, CPNP
- Primary taxonomy
- Registered Nurse 163W00000X
- License number
- RN 233662 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7700 Morro RD, Atascadero, CA 93422
- Phone
- (805) 466-6622
- Enumerated
- Jul 6, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 461-0361
- Entity
- Type 1 · individual
Also registered at 7700 Morro RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rachel Haynes, CPNP, DNPPediatric Nurse Practitioner1710280409
- Laura Hutchison, MDPediatrics Physician1477592087
- Brian Patterson, M.D.Pediatrics Physician1700880135
- Rosa Rosen, M.D.Pediatrics Physician1851527089
- James Tedford, M.D.Pediatrics Physician1548265515
Verify Ellen M. Castellanos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license RN 233662Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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Common questions
What is Ellen M. Castellanos, RN, CPNP's NPI number?
Ellen M. Castellanos, RN, CPNP's National Provider Identifier (NPI) is 1659303345, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ellen M. Castellanos, RN, CPNP located?
The NPPES record lists a practice address at 7700 Morro RD, Atascadero, CA, 93422. Phone: (805) 466-6622. Providers update this record themselves, so call before visiting.
How can I verify Ellen M. Castellanos, RN, CPNP's license?
NPPES lists California license number RN 233662, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.