Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jacqueline To, M.D.

Internal Medicine Physician in Menlo Park, CA · enumerated 2017.

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

National Provider Identifier

1215461645

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Registry record

Entity type Individual (Type 1)

Name Jacqueline To

Credential M.D.

Sex Female

Practice address 1906 El Camino Real Ste 202, Menlo Park, CA, 94027

Phone (650) 585-3272

Enumeration date Apr 12, 2017

Last updated in NPPES Mar 9, 2026

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A160368 (CA) 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

Where does Jacqueline To practice?

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

What is the NPI number for Jacqueline To?

The National Provider Identifier (NPI) for Jacqueline To is 1215461645, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-09.