Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Amy Day, N.D.

Naturopath in Oakland, CA · enumerated 2007.

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

National Provider Identifier

1780737536

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Registry record

Entity type Individual (Type 1)

Name Dr. Amy Day

Credential N.D.

Sex Female

Practice address 2940 Summit St Ste 2d, Oakland, CA, 94609

Phone (510) 859-4572

Enumeration date Jan 18, 2007

Last updated in NPPES Jul 23, 2025

Taxonomy & licenses

175F00000X Naturopath Other Service Providers · License ND-4 (CA) Primary

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 specialty is Amy Day?

Amy Day is registered in NPPES with the primary taxonomy of Naturopath. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-23.