Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Castillo Medical Group, PA

Family Medicine Physician in San Antonio, TX · enumerated 2006 · authorized official Efrem Castillo, President.

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

National Provider Identifier

1356380752

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Castillo Medical Group, PA

Practice address 5018 San Pedro Ave, San Antonio, TX, 78212

Phone (210) 832-8900

Enumeration date Jun 4, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Efrem Castillo

Title President

Phone (210) 832-8900

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 Castillo Medical Group, PA located?

The practice location on file with NPPES is in San Antonio, TX.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Noah Greene Cardiovascular Disease Physician · San Antonio, TX NPI 1578788857 Alamo Ceneter Ent Substance Abuse Rehabilitation Facility · San Antonio, TX NPI 1366945057 Alamo Center Education and Treatment LLC Substance Abuse Rehabilitation Facility · San Antonio, TX NPI 1588249171

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.