Tammy Duncan
NPI 1609436500 · Addiction (Substance Use Disorder) Counselor · Lemon Grove, CA
Tammy Duncan is a Addiction (Substance Use Disorder) Counselor provider in Lemon Grove, CA (NPI 1609436500).
Provider details
- NPI number
- 1609436500
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- 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
7 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
- 2019-06-13
- Last updated
- 2019-06-13
Frequently asked questions
- What is Tammy Duncan's NPI number?
- Tammy Duncan's National Provider Identifier (NPI) is 1609436500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Duncan's specialty?
- Tammy Duncan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Tammy Duncan located?
- Tammy Duncan's practice location on file with NPPES is 2049 Skyline Dr, Lemon Grove, CA 91945-4221.
- What is Tammy Duncan's phone number?
- The practice phone number listed in the NPPES registry for Tammy Duncan is (619) 465-7303.
- Is Tammy Duncan's NPI active?
- Yes — Tammy Duncan's NPI (1609436500) is active in the NPPES registry as of the last update on 2019-06-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.