DR. GEORGE MATTHEW MUSSMAN MD
NPI 1881398170
Pediatrics in Lake Geneva, WI
About Dr. George Matthew Mussman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GEORGE MATTHEW MUSSMAN MD (NPI 1881398170) is an individual pediatrics provider in Lake Geneva, Wisconsin, licensed in Illinois (125.081966) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2023).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. George Matthew Mussman Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show George Mussman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Janesville, WI 53548
- Reassigned Medicare billing, Wisconsin enrollment
- 1,155 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53147 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is George Mussman's NPI number?
The NPI number for George Mussman is 1881398170. It was assigned to this individual provider in the NPPES registry on March 29, 2023.
Where is George Mussman located?
George Mussman practices at N2950 State Road 67, Lake Geneva, WI 53147. The listed phone number is (262) 245-0535.
What is George Mussman's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is George Mussman enrolled in Medicare?
Yes. George Mussman is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for George Mussman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), George Mussman reassigns Medicare benefits to Mercy Health System Corporation (Janesville, WI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for George Mussman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does George Mussman accept?
Health plans from MercyCare and MercyCare Health Plans list George Mussman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for George Mussman was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 60 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.