Mark Patterson MD
About this NPIWhat this record shows.
NPI 1134121478 is registered to Mark Patterson MD, a Internal Medicine practising at 3111 Gundersen Dr in Onalaska, Wisconsin. Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties. Mark Patterson MD has been enumerated in the National Provider Identifier (NPI) registry since 2005.
Beyond the registryWhat this record adds.
This record carries 1 secondary identifier beyond the base NPI: Medicaid and other payer cross-references used by billers and credentialers, which the standard CMS NPPES lookup does not surface. Within the directory it is one of 2,265 Internal Medicine providers on file in Wisconsin.
Source: CMS NPPES and PECOS public files. snapshot, refreshed monthly.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Medicaid
- 31926600WI
Source: NPPES public registry.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Mark Patterson MD accepts. To confirm in-network status with your specific health plan, contact Mark Patterson MD directly at (608) 782-7300.
Frequently asked
Yes. NPI 1134121478 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (608) 782-7300.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Mark Patterson MD is a Type-1 individual NPI.
As of the latest monthly CMS NPPES snapshot, 2,265 Internal Medicine providers are registered in Wisconsin, and Mark Patterson MD is one of them. The figure refreshes each month from the federal source.