Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Melissa Ann Thacher, R.N.

Registered Nurse in San Marcos, CA · enumerated 2011.

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

National Provider Identifier

1811272909

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Registry record

Entity type Individual (Type 1)

Name Melissa Ann Thacher

Credential R.N.

Sex Female

Practice address 150 Valpreda Rd, San Marcos, CA, 92069

Phone (760) 736-6780

Fax (760) 736-8740

Enumeration date Oct 20, 2011

Last updated in NPPES Oct 20, 2011

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 803179 (CA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

Where does Melissa Thacher practice?

The practice location on file with NPPES is in San Marcos, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Melissa Thacher?

The National Provider Identifier (NPI) for Melissa Thacher is 1811272909, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-20.