Clarence Rowan
NPI 1891244646 · Addiction (Substance Use Disorder) Counselor · Hayward, CA
Clarence Rowan is a Addiction (Substance Use Disorder) Counselor provider in Hayward, CA (NPI 1891244646).
Provider details
- NPI number
- 1891244646
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
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
9 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
- 2016-09-21
- Last updated
- 2016-09-21
Frequently asked questions
- What is Clarence Rowan's NPI number?
- Clarence Rowan's National Provider Identifier (NPI) is 1891244646, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clarence Rowan's specialty?
- Clarence Rowan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Clarence Rowan located?
- Clarence Rowan's practice location on file with NPPES is 107 Jackson St, Hayward, CA 94544-1948.
- What is Clarence Rowan's phone number?
- The practice phone number listed in the NPPES registry for Clarence Rowan is (510) 886-8696.
- Is Clarence Rowan's NPI active?
- Yes — Clarence Rowan's NPI (1891244646) is active in the NPPES registry as of the last update on 2016-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.