James Warren, D.D.S.
NPI 1861877623 · General Practice Dentistry · Millbrae, CA
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Warren, D.D.S. is a General Practice Dentistry provider in Millbrae, CA (NPI 1861877623).
Provider details
- NPI number
- 1861877623
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 64795 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
10 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$51 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 181 2nd Ave Ste 575San Mateo, CA 94401-3838Phone: (650) 532-3092
Registry dates
- Enumerated
- 2015-07-22
- Last updated
- 2021-04-22
- Certified
- 2021-04-22
Frequently asked questions
- What is James Warren's NPI number?
- James Warren's National Provider Identifier (NPI) is 1861877623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Warren's specialty?
- James Warren is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is James Warren located?
- James Warren's practice location on file with NPPES is 453 Broadway, Millbrae, CA 94030-1905.
- What is James Warren's phone number?
- The practice phone number listed in the NPPES registry for James Warren is (650) 697-2073.
- Does James Warren accept Medicare?
- James Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Warren's NPI active?
- Yes — James Warren's NPI (1861877623) is active in the NPPES registry as of the last update on 2021-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.