Sage Williams
NPI 1831505247 · Marriage & Family Therapist · Alameda, CA
Enrolled with Medicare as Practitioner - Marriage and Family Therapist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sage Williams is a Marriage & Family Therapist provider in Alameda, CA (NPI 1831505247).
Provider details
- NPI number
- 1831505247
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 104078 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 3221 Hamline Ave Apt 4Oakland, CA 94602-1553Phone: (404) 664-5941
- 982 Mission StSan Francisco, CA 94103-2911Phone: (404) 664-5941
Registry dates
- Enumerated
- 2014-07-07
- Last updated
- 2024-07-09
- Certified
- 2024-07-09
Frequently asked questions
- What is Sage Williams's NPI number?
- Sage Williams's National Provider Identifier (NPI) is 1831505247, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sage Williams's specialty?
- Sage Williams is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Sage Williams located?
- Sage Williams's practice location on file with NPPES is 1242 Park St Ste C, Alameda, CA 94501-5500.
- What is Sage Williams's phone number?
- The practice phone number listed in the NPPES registry for Sage Williams is (510) 521-3500.
- Does Sage Williams accept Medicare?
- Sage Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sage Williams's NPI active?
- Yes — Sage Williams's NPI (1831505247) is active in the NPPES registry as of the last update on 2024-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.