Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Annalis Elizabeth Castillo, ACPNP

Critical Care Pediatric Nurse Practitioner in Park Ridge, IL · enumerated 2016.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538520606

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Registry record

Entity type Individual (Type 1)

Name Annalis Elizabeth Castillo

Credential ACPNP

Sex Female

Practice address 1775 Dempster St, Park Ridge, IL, 60068

Phone (847) 723-2210

Enumeration date Mar 16, 2016

Last updated in NPPES Feb 19, 2026

Taxonomy & licenses

363LP0222X Critical Care Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209.0.0613 (IL) Primary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209.0.0613 (IL) Secondary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Annalis Castillo?

The National Provider Identifier (NPI) for Annalis Castillo is 1538520606, a Type 1 (individual) record in the CMS NPPES registry.

Where does Annalis Castillo practice?

The practice location on file with NPPES is in Park Ridge, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-19.