Mark Hollowitsch, CSAC
NPI 1245270172 · Addiction (Substance Use Disorder) Counselor · La Crosse, WI
Mark Hollowitsch, CSAC is a Addiction (Substance Use Disorder) Counselor provider in La Crosse, WI (NPI 1245270172).
Provider details
- NPI number
- 1245270172
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CSAC
- Sex
- Male
- Sole proprietor
- No
- License
- 1631 (WI)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
20 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
- 2006-06-08
- Last updated
- 2011-12-20
Frequently asked questions
- What is Mark Hollowitsch's NPI number?
- Mark Hollowitsch's National Provider Identifier (NPI) is 1245270172, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Hollowitsch's specialty?
- Mark Hollowitsch is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Hollowitsch located?
- Mark Hollowitsch's practice location on file with NPPES is 212 11th Street S., La Crosse, WI 54601-4116.
- What is Mark Hollowitsch's phone number?
- The practice phone number listed in the NPPES registry for Mark Hollowitsch is (608) 392-9555.
- Is Mark Hollowitsch's NPI active?
- Yes — Mark Hollowitsch's NPI (1245270172) is active in the NPPES registry as of the last update on 2011-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.