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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ROBERT CHARLES TANNER ZAAS
NPI 1235715822
Radiology - Diagnostic Radiology in Madison, WI

Active since March 23, 2021PECOS Enrolled
600 HIGHLAND AVE, MADISON, WI 53792(608) 263-0899(608) 263-0876 Get Directions Write a Review

NPPES record last updated: July 1, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Robert Charles Tanner Zaas NPPES

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

ROBERT CHARLES TANNER ZAAS (NPI 1235715822) is an individual diagnostic radiology provider in Madison, Wisconsin, licensed in Wisconsin (87106-20) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS and maintains a secondary practice location in Columbus.

NPPES Registry Identity

NPI1235715822
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameROBERT CHARLES TANNER ZAAS
Location Address600 HIGHLAND AVEMadison, WI 53792-0001
Mailing Address7974 Uw Health CtMiddleton, WI 53562-5531
Phone(608) 263-0899
Fax(608) 263-0876
Sole ProprietorNo
Enumeration DateMarch 23, 2021
Last NPPES UpdateJuly 1, 2026
NPPES CertifiedJuly 1, 2026
✔ NPI 1235715822 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in WI · 87106-20
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
600 HIGHLAND AVE, Madison, WI 53792
Open in Google Maps ↗

Secondary Practice Location 1

Location 1395 W 12th Ave Rm 414Columbus, OH 43210-1267 · Phone (614) 366-0768 · Fax (614) 293-6935

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Robert Charles Tanner Zaas 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53792 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
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$67.37 typical visit price
range $17.40 – $133.76
Typical copayment $16.84 (range $4.35 – $33.44)
Most-billed visit code 99213
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.

JASON ALAN CHRISTENSEN PHARMD
Pharmacist
600 HIGHLAND AVE, COMPLIANCE MAIL CODE 2433
MADISON, WI 53792
Dane County (608) 662-0817
LAURA JEAN KOPPLIN MD, PHD
Ophthalmology
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-6070
HAGGI MAZEH MD
Surgery
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 265-8072
DR. SWAPNIL SUNIL LANJEWAR M.D.
Internal Medicine (Infectious Disease)
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-0946
DR. MATTHEW JAMES HOYT M.D.
Anesthesiology
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8100
VANESSA MERCEDES WELTEN MD MPH
Transplant Surgery
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (617) 732-5500
JOHN HENRY NORMAN HARRISON
Anesthesiology
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8100
PIPPA FROUKTE COSPER MD
Radiology (Radiation Oncology)
600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8500

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 Zaas's NPI number?

The NPI number for Robert Zaas is 1235715822. It was assigned to this individual provider in the NPPES registry on March 23, 2021.

Where is Robert Zaas located?

Robert Zaas practices at 600 Highland Ave, Madison, WI 53792. The listed phone number is (608) 263-0899.

What is Robert Zaas's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Robert Zaas enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for Robert Zaas was last updated on July 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 46 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.