Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Acute Response Team Corp

Adult Medicine Physician in Chula Vista, CA · enumerated 2013 · authorized official Guillermo Castillo, President/Ceo.

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

National Provider Identifier

1881023968

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Registry record

Entity type Organization (Type 2)

Legal business name Acute Response Team Corp

Practice address 2951 Four Corners St, Chula Vista, CA, 91914

Phone (619) 591-9826

Fax (619) 623-3208

Enumeration date Nov 8, 2013

Last updated in NPPES Apr 8, 2015

Taxonomy & classification

207QA0505X Adult Medicine Physician Allopathic & Osteopathic Physicians · License 071290 (CA) Primary

Authorized official

Name Guillermo Castillo

Title President/Ceo

Phone (619) 823-1947

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

Where is Acute Response Team Corp located?

The practice location on file with NPPES is in Chula Vista, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2015-04-08. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-08.