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Dayone Center, San Francisco

Lactation Consultant (Registered Nurse) in San Francisco, CA · enumerated 2011 · authorized official Nancy Held, Vp, Clinical & Education Services.

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

National Provider Identifier

1831477157

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Registry record

Entity type Organization (Type 2)
Legal business name Dayone Center, San Francisco
Parent organization Dayone Centers, Inc
Practice address 3490 California St, Suite 203, San Francisco, CA, 94118
Phone (415) 440-3291
Enumeration date Aug 3, 2011
Last updated in NPPES Aug 3, 2011

Taxonomy & classification

163WL0100X Lactation Consultant (Registered Nurse) Nursing Service Providers Primary

Authorized official

Name Nancy Held
Title Vp, Clinical & Education Services
Phone (415) 309-5830

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.

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Frequently asked questions

What type of organization is Dayone Center, San Francisco?
Dayone Center, San Francisco is registered in NPPES as a Lactation Consultant (Registered Nurse) (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-03.