Michael Grubb
NPI 1629301221 · Addiction (Substance Use Disorder) Counselor · Oakland, CA
Michael Grubb is a Addiction (Substance Use Disorder) Counselor provider in Oakland, CA (NPI 1629301221).
Provider details
- NPI number
- 1629301221
- 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
- Mental Health Counselor101YM0800X
Behavioral Health & Social Service Providers
- Case Manager/Care Coordinator171M00000X
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
- 2009-09-14
- Last updated
- 2014-10-03
Frequently asked questions
- What is Michael Grubb's NPI number?
- Michael Grubb's National Provider Identifier (NPI) is 1629301221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Grubb's specialty?
- Michael Grubb is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Michael Grubb located?
- Michael Grubb's practice location on file with NPPES is 390 40th St, Oakland, CA 94609-2633.
- What is Michael Grubb's phone number?
- The practice phone number listed in the NPPES registry for Michael Grubb is (510) 653-5040.
- Is Michael Grubb's NPI active?
- Yes — Michael Grubb's NPI (1629301221) is active in the NPPES registry as of the last update on 2014-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.