David Hartfield-Dyels, M.DIV
NPI 1336354554 · Addiction (Substance Use Disorder) Counselor · Vallejo, CA
David Hartfield-Dyels, M.DIV is a Addiction (Substance Use Disorder) Counselor provider in Vallejo, CA (NPI 1336354554).
Provider details
- NPI number
- 1336354554
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- M.DIV
- Sex
- Male
- Sole proprietor
- No
- License
- 100079AN (CA)
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
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
- 2007-05-11
- Last updated
- 2021-11-26
- Certified
- 2021-11-14
Frequently asked questions
- What is David Hartfield-Dyels's NPI number?
- David Hartfield-Dyels's National Provider Identifier (NPI) is 1336354554, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Hartfield-Dyels's specialty?
- David Hartfield-Dyels is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is David Hartfield-Dyels located?
- David Hartfield-Dyels's practice location on file with NPPES is 927 Amador Street, Vallejo, CA 94510.
- What is David Hartfield-Dyels's phone number?
- The practice phone number listed in the NPPES registry for David Hartfield-Dyels is (510) 473-5410.
- Is David Hartfield-Dyels's NPI active?
- Yes — David Hartfield-Dyels's NPI (1336354554) is active in the NPPES registry as of the last update on 2021-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.