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DR. ROBERT AARON MARSHALL MD, MPH
NPI 1063438570
Preventive Medicine - Occupational Medicine in Janesville, WI

Active since July 15, 2006PECOS Enrolled
1010 N WASHINGTON ST, JANESVILLE, WI 53548(608) 741-3800(608) 741-3838 Get Directions Write a Review

NPPES record last updated: May 29, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Robert Aaron Marshall Md, Mph NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ROBERT AARON MARSHALL MD, MPH (NPI 1063438570) is an individual occupational medicine provider in Janesville, Wisconsin, licensed in Wisconsin (64058-20) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063438570
Entity TypeIndividualMale
Primary Taxonomy2083X0100X
Provider Legal NameDR. ROBERT AARON MARSHALLCredential: MD, MPH
Location Address1010 N WASHINGTON STJanesville, WI 53548-1500
Mailing Address1010 N Washington StJanesville, WI 53548-1500 · (608) 741-3800 · Fax (608) 741-3838
Phone(608) 741-3800
Fax(608) 741-3838
Sole ProprietorNo
Enumeration DateJuly 15, 2006
Last NPPES UpdateMay 29, 2015
✔ NPI 1063438570 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPreventive Medicine · Occupational MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2083X0100X
Licenses✔ Licensed in WI · 64058-20✔ Licensed in OH · 035049148
Definition
Occupational medicine focuses on the health of workers, including the ability to perform work; the physical, chemical, biological, and social environments of the workplace; and the health outcomes of environmental exposures. Practitioners in this field address the promotion of health in the work place, and the prevention and management of occupational and environmental injury, illness, and disability.
1010 N WASHINGTON ST, Janesville, WI 53548
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Robert Aaron Marshall Md, Mph is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Robert Marshall reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Health System Corporation
0.5 mi
General Acute Care Hospital
1000 MINERAL POINT AVE
Janesville, WI 53548
  • Reassigned Medicare billing, Wisconsin and Illinois enrollments
  • Also billed through NPI 1598718603 (Illinois)
  • 1,155 clinicians in this Medicare group
NPI 1093768962 (608) 756-6000
Rockford Health Physicians
26 mi
Multi-Specialty
8201 E RIVERSIDE BLVD
Rockford, IL 61114
  • Reassigned Medicare billing, Illinois enrollment
  • 1,375 clinicians in this Medicare group
NPI 1043242886 (608) 314-2428

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 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.

New Patient
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. TIMOTHY S REID MD
Family Medicine
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-6799
MERCY HEALTH SYSTEM CORPORATION
Durable Medical Equipment & Medical Supplies
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-2430
DAWN SCHATTSCHNEIDER LMT
Massage Therapist
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-6799
SCOTT M PRISKE DC
Chiropractor
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-2430
KEVIN B WALTER OD
Optometrist
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-6794
DR. MEGAN NICOLE ZAINER DPM
Podiatrist
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-2430
DR. STEPHEN A LINDAHL MD
Family Medicine
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-3800
DR. JOHN CHRISTOPHER ROCKWELL O.D.
Optometrist
1010 N WASHINGTON ST
JANESVILLE, WI 53548
Rock County (608) 741-6794

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 Robert Marshall's NPI number?

The NPI number for Robert Marshall is 1063438570. It was assigned to this individual provider in the NPPES registry on July 15, 2006.

Where is Robert Marshall located?

Robert Marshall practices at 1010 N Washington St, Janesville, WI 53548. The listed phone number is (608) 741-3800.

What is Robert Marshall's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Occupational Medicine, with taxonomy code 2083X0100X.

Is Robert Marshall enrolled in Medicare?

Yes. Robert Marshall is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Robert Marshall's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Marshall reassigns Medicare benefits to 2 organizations: Mercy Health System Corporation (Janesville, WI) and Rockford Health Physicians (Rockford, IL). 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 Robert Marshall's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Robert Marshall was last updated on May 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.