Efrem Castillo M.D.
About this NPIWhat this record shows.
NPI 1003888785 is registered to Efrem Castillo M.D., a Family Medicine practising at 8637 Fredericksburg Rd, Ste 360 in San Antonio, Texas. Family Medicine physicians provide comprehensive primary care for patients of all ages, including preventive care, chronic disease management, and acute illness treatment. Efrem Castillo M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Other
- TXB154545· Issued by WELLMED MEDICAL GROUP PA
Source: NPPES public registry.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Efrem Castillo M.D. accepts. To confirm in-network status with your specific health plan, contact Efrem Castillo M.D. directly at (210) 877-7669.
Frequently asked
Yes. NPI 1003888785 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Family Medicine physicians provide comprehensive primary care for patients of all ages, including preventive care, chronic disease management, and acute illness treatment.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (210) 877-7669.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Efrem Castillo M.D. is a Type-1 individual NPI.