Marcus Williams
NPI 1033996020 · Addiction (Substance Use Disorder) Counselor · Sacramento, CA
Marcus Williams is a Addiction (Substance Use Disorder) Counselor provider in Sacramento, CA (NPI 1033996020).
Provider details
- NPI number
- 1033996020
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
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
2 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2023-09-12
- Last updated
- 2026-03-17
- Certified
- 2026-03-17
Frequently asked questions
- What is Marcus Williams's NPI number?
- Marcus Williams's National Provider Identifier (NPI) is 1033996020, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Williams's specialty?
- Marcus Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Marcus Williams located?
- Marcus Williams's practice location on file with NPPES is 1550 Juliesse Ave, Sacramento, CA 95815-1803.
- What is Marcus Williams's phone number?
- The practice phone number listed in the NPPES registry for Marcus Williams is (916) 921-6598.
- Is Marcus Williams's NPI active?
- Yes — Marcus Williams's NPI (1033996020) is active in the NPPES registry as of the last update on 2026-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.