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Mark Patterson, MD
NPI 1134121478 · Internal Medicine Physician · Onalaska, WI
Mark Patterson, MD is a Internal Medicine Physician provider in Onalaska, WI (NPI 1134121478).
Provider details
- NPI number
- 1134121478
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32494 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 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
3111 Gundersen Dr
Onalaska, WI 54650-8447
Phone: (608) 782-7300
Approximate (ZIP-level) locationGet directions
Mailing address
1836 South Ave
La Crosse, WI 54601-5429
Registry dates
- Enumerated
- 2005-06-01
- Last updated
- 2015-06-02
Frequently asked questions
- What is Mark Patterson's NPI number?
- Mark Patterson's National Provider Identifier (NPI) is 1134121478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Patterson's specialty?
- Mark Patterson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Patterson located?
- Mark Patterson's practice location on file with NPPES is 3111 Gundersen Dr, Onalaska, WI 54650-8447.
- What is Mark Patterson's phone number?
- The practice phone number listed in the NPPES registry for Mark Patterson is (608) 782-7300.
- Is Mark Patterson's NPI active?
- Yes — Mark Patterson's NPI (1134121478) is active in the NPPES registry as of the last update on 2015-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.