Dayone Centers Inc
NPI 1366659799 · Lactation Consultant (Registered Nurse) · San Francisco, CA
Dayone Centers Inc is a Lactation Consultant (Registered Nurse) organization in San Francisco, CA (NPI 1366659799).
Provider details
- NPI number
- 1366659799
- Entity type
- Organization
- Primary specialty
- Lactation Consultant (Registered Nurse)Nursing Service Providers
- Organization subpart
- No
- Authorized official
- Nancy Held, Co-Founder, Vp Clinical & Education(415) 421-5300
- License
- RN393309 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-16
- Last updated
- 2020-08-22
Frequently asked questions
- What is Dayone Centers Inc's NPI number?
- Dayone Centers Inc's National Provider Identifier (NPI) is 1366659799, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Dayone Centers Inc?
- Dayone Centers Inc is classified in the NPPES registry as Lactation Consultant (Registered Nurse) (Nursing Service Providers).
- Where is Dayone Centers Inc located?
- Dayone Centers Inc's practice location on file with NPPES is 3490 California St, San Francisco, CA 94118-1891.
- What is Dayone Centers Inc's phone number?
- The practice phone number listed in the NPPES registry for Dayone Centers Inc is (415) 440-3291.
- Who is the authorized official for Dayone Centers Inc?
- The authorized official listed on Dayone Centers Inc's NPPES record is Nancy Held, Co-Founder, Vp Clinical & Education. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Dayone Centers Inc's NPI active?
- Yes — Dayone Centers Inc's NPI (1366659799) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.