NPPES file of Aug 9, 2026

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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1659303345
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
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest registered nurse records → All 13,506 in California → Look up another NPI →

Also registered at 7700 Morro RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kaitlin Anderson, DNP, CPNPPediatric Nurse Practitioner1346645595
  2. Rachel Haynes, CPNP, DNPPediatric Nurse Practitioner1710280409
  3. Laura Hutchison, MDPediatrics Physician1477592087
  4. Brian Patterson, M.D.Pediatrics Physician1700880135
  5. Rosa Rosen, M.D.Pediatrics Physician1851527089
  6. James Tedford, M.D.Pediatrics Physician1548265515

Verify Ellen M. Castellanos in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license RN 233662    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Ellen M. Castellanos among 13,506 registered nurse records in California

Ellen M. Castellanos, RN, CPNP is one of 13,506 registered nurse records with a practice address in California. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 97% newer
  • In a Medicare fileNo · 3% of these records are
  • In the CMS Doctors and Clinicians fileNo · 1% of these records are
  • Record last updated2007 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Registered Nurse providers in California

There are 13,506 registered nurse records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 13,506 in California → Every provider in Atascadero → Registered Nurse nationwide →

The 8 registered nurse records with the nearest ZIP codes

  1. Maru Chamorro-Kiel, RCNAtascadero, CA 934221831462506
  2. Samuel Mungai, RNAtascadero, CA 934221346966900
  3. Jennifer NewmanAtascadero, CA 934221891589511
  4. Morgan Ramos, RNAtascadero, CA 934221255262291
  5. Taylor ReyesAtascadero, CA 934221700501434
  6. Deborah Wright, RNAtascadero, CA 934221245463025
  7. Judith Kodaj, R.N.Arroyo Grande, CA 934201972718609
  8. Alison LoriaArroyo Grande, CA 934201609238286

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.