John Larson, SAC-IT
NPI 1619520251 · Addiction (Substance Use Disorder) Counselor · Fond Du Lac, WI
John Larson, SAC-IT is a Addiction (Substance Use Disorder) Counselor provider in Fond Du Lac, WI (NPI 1619520251).
Provider details
- NPI number
- 1619520251
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- SAC-IT
- Sex
- Male
- Sole proprietor
- No
- License
- 18138-130 (WI)
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
6 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
- 2019-07-23
- Last updated
- 2019-07-23
Frequently asked questions
- What is John Larson's NPI number?
- John Larson's National Provider Identifier (NPI) is 1619520251, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Larson's specialty?
- John Larson is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Larson located?
- John Larson's practice location on file with NPPES is 430 E Division St, Fond Du Lac, WI 54935-4560.
- What is John Larson's phone number?
- The practice phone number listed in the NPPES registry for John Larson is (920) 926-4172.
- Is John Larson's NPI active?
- Yes — John Larson's NPI (1619520251) is active in the NPPES registry as of the last update on 2019-07-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.