Gary Dillahunty
NPI 1659564623 · Addiction (Substance Use Disorder) Counselor · Vallejo, CA
Gary Dillahunty is a Addiction (Substance Use Disorder) Counselor provider in Vallejo, CA (NPI 1659564623).
Provider details
- NPI number
- 1659564623
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 101YA0400X (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
18 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
- 2007-08-23
- Last updated
- 2007-08-23
Frequently asked questions
- What is Gary Dillahunty's NPI number?
- Gary Dillahunty's National Provider Identifier (NPI) is 1659564623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Dillahunty's specialty?
- Gary Dillahunty is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Gary Dillahunty located?
- Gary Dillahunty's practice location on file with NPPES is 419 Pennsylvania St, Vallejo, CA 94590-6933.
- What is Gary Dillahunty's phone number?
- The practice phone number listed in the NPPES registry for Gary Dillahunty is (707) 643-2715.
- Is Gary Dillahunty's NPI active?
- Yes — Gary Dillahunty's NPI (1659564623) is active in the NPPES registry as of the last update on 2007-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.