DR. MERLE S RUST MD
NPI 1033144977
Neurological Surgery in Janesville, WI
About Dr. Merle S Rust Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MERLE S RUST MD (NPI 1033144977) is an individual neurological surgery provider in Janesville, Wisconsin, licensed in Wisconsin (WI50768) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1992).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Merle S Rust Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Merle Rust reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Janesville, WI 53548
- Reassigned Medicare billing, Wisconsin enrollment
- 1,155 clinicians in this Medicare group
Terre Haute, IN 47807
- Reassigned Medicare billing, Indiana enrollment
- 306 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53548 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.
JANESVILLE, WI 53548
JANESVILLE, WI 53548
JANESVILLE, WI 53548
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 Merle Rust's NPI number?
The NPI number for Merle Rust is 1033144977. It was assigned to this individual provider in the NPPES registry on July 11, 2006.
Where is Merle Rust located?
Merle Rust practices at 1000 Mineral Point Ave Mercy West Neurosurgery, Janesville, WI 53548. The listed phone number is (608) 756-6826.
What is Merle Rust's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Merle Rust enrolled in Medicare?
Yes. Merle Rust is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Merle Rust's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Merle Rust reassigns Medicare benefits to 2 organizations: Mercy Health System Corporation (Janesville, WI) and Union Associated Physicians Clinic, LLC (Terre Haute, IN). Each 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 Merle Rust's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Merle Rust accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Buckeye Health Plan, Ambetter from Meridian and CareSource list Merle Rust 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 Merle Rust was last updated on August 29, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.
# Dr. Merle S Rust, MD · NPI 1033144977
Neurological Surgery physician in Janesville, Wisconsin. Individual provider, active in the CMS NPPES registry since July 11, 2006.
## Identity
- **NPI:** 1033144977 (Entity type: Individual)
- **Enumerated:** July 11, 2006
- **Primary specialty:** Neurological Surgery · taxonomy 207T00000X
- **State license:** WI50768 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 MINERAL POINT AVE, MERCY WEST NEUROSURGERY, Janesville, WI 53548-2940
- **Phone:** (608) 756-6826 · **Fax:** (608) 756-6291
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mercy Health System Corporation (NPI 1093768962, Janesville, WI); Union Associated Physicians Clinic, LLC (NPI 1891028379, Terre Haute, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1992
## Record status
- **NPPES last updated:** August 29, 2007
- **Other identifiers:** Medicare UPIN G76944
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Source: [NPI Profile](https://npiprofile.com/npi/1033144977) · Data from the CMS NPPES public registry.