Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marcial Castillo, MD

General Practice Physician in Juana Diaz, PR · enumerated 2007.

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

National Provider Identifier

1124170048

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Marcial Castillo

Credential MD

Sex Male

Practice address Hc 02 Box 8992, Juana Diaz, PR, 00795

Phone (787) 315-3799

Fax (787) 845-1193

Enumeration date Jan 18, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 16712 (PR) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Marcial Castillo?

The National Provider Identifier (NPI) for Marcial Castillo is 1124170048, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marcial Castillo practice?

The practice location on file with NPPES is in Juana Diaz, PR. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.