Donald Cowan, JD
NPI 1366243826 · Addiction (Substance Use Disorder) Counselor · San Rafael, CA
Donald Cowan, JD is a Addiction (Substance Use Disorder) Counselor provider in San Rafael, CA (NPI 1366243826).
Provider details
- NPI number
- 1366243826
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- JD
- 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
1 yr 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
- 2025-03-21
- Last updated
- 2025-03-21
- Certified
- 2025-03-21
Frequently asked questions
- What is Donald Cowan's NPI number?
- Donald Cowan's National Provider Identifier (NPI) is 1366243826, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Cowan's specialty?
- Donald Cowan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Donald Cowan located?
- Donald Cowan's practice location on file with NPPES is 603 D St, San Rafael, CA 94901-3719.
- What is Donald Cowan's phone number?
- The practice phone number listed in the NPPES registry for Donald Cowan is (415) 492-4444.
- Is Donald Cowan's NPI active?
- Yes — Donald Cowan's NPI (1366243826) is active in the NPPES registry as of the last update on 2025-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.