Dr. Mariel Castillo MD
Also known as
- Formerly known asCastillo-Guanzon, Mariel
Source: NPPES public registry.
About this NPIWhat this record shows.
NPI 1326139700 is registered to Dr. Mariel Castillo MD, a Pediatrics practising at 2320 Freeway Dr in Mount Vernon, Washington. Pediatrics is the medical specialty focused on the health of infants, children, and adolescents through age 21. Dr. Mariel Castillo MD 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
- 263681WA· Issued by LABOR & INDUSTRIES
Source: NPPES public registry.
Medicare enrollment
This provider holds a Medicare enrollment on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20100312001035Internal MedicineWA
Source: CMS PECOS public enrollment file.
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 Dr. Mariel Castillo MD accepts. To confirm in-network status with your specific health plan, contact Dr. Mariel Castillo MD directly at (360) 814-6870.
Frequently asked
Yes. NPI 1326139700 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Pediatrics is the medical specialty focused on the health of infants, children, and adolescents through age 21.
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 (360) 814-6870.
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. Dr. Mariel Castillo MD is a Type-1 individual NPI.