Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Thomas Michael Castilaw

Nurse Practitioner in Red Bud, IL · enumerated 2018.

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

National Provider Identifier

1588147623

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Thomas Michael Castilaw

Sex Male

Practice address 325 Spring St, Red Bud, IL, 62278

Phone (618) 282-7373

Fax (618) 282-5476

Enumeration date Sep 14, 2018

Last updated in NPPES Jan 25, 2023

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License A005907 (AR) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209019982 (IL) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209019982 (IL) Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Thomas Castilaw?

Thomas Castilaw is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-25.