DR. STEPHEN JOHN JOHNSTON M.D.
NPI 1255759189
Radiology - Diagnostic Radiology in Milwaukee, WI
About Dr. Stephen John Johnston M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHEN JOHN JOHNSTON M.D. (NPI 1255759189) is an individual diagnostic radiology provider in Milwaukee, Wisconsin, licensed in Wisconsin (66599-20) and active in the NPI registry since March 2014. He is enrolled in Medicare PECOS, is affiliated with Aurora Medical Ctr Manitowoc County, and is a graduate of Medical College Of Wisconsin (2014).
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. Stephen John Johnston M.d. 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
4Medicare enrollment records show Stephen Johnston reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milwaukee, WI 53226
- Reassigned Medicare billing, Wisconsin enrollment
- 3,983 clinicians in this Medicare group
Menomonee Falls, WI 53051
- Reassigned Medicare billing, Wisconsin enrollment
- 2,294 clinicians in this Medicare group
Manitowoc, WI 54220
- Reassigned Medicare billing, Wisconsin enrollment
- 350 clinicians in this Medicare group
Manitowoc, WI 54221
- Reassigned Medicare billing, Wisconsin enrollment
- 3 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 73
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Aurora Medical Ctr Manitowoc County
Acute Care Hospitals · Two Rivers, WICommunity Memorial Hospital
Acute Care Hospitals · Menomonee Falls, WIHoly Family Memorial
Acute Care Hospitals · Manitowoc, WIFroedtert Memorial Lutheran Hospital
Acute Care Hospitals · Milwaukee, WIFroedtert Community Hospital
Acute Care Hospitals · New Berlin, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53226 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.
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
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 Stephen Johnston's NPI number?
The NPI number for Stephen Johnston is 1255759189. It was assigned to this individual provider in the NPPES registry on March 28, 2014.
Where is Stephen Johnston located?
Stephen Johnston practices at 9200 W Wisconsin Ave, Milwaukee, WI 53226. The listed phone number is (414) 955-1187.
What is Stephen Johnston's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Stephen Johnston enrolled in Medicare?
Yes. Stephen Johnston 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 Stephen Johnston's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Johnston reassigns Medicare benefits to 4 organizations: The Medical College Of Wisconsin, Inc. (Milwaukee, WI), Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (Menomonee Falls, WI), Froedtert Manitowoc Medical Group, LLC (Manitowoc, WI) and Lakeshore Radiology Associates Sc (Manitowoc, WI). 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 Stephen Johnston's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Johnston accept?
Health plans from Anthem Blue Cross and Blue Shield list Stephen Johnston 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.
Is Stephen Johnston affiliated with any hospitals?
According to CMS data, Stephen Johnston is affiliated with Aurora Medical Ctr Manitowoc County, Community Memorial Hospital, Holy Family Memorial, Froedtert Memorial Lutheran Hospital and Froedtert Community Hospital.
When was this NPI record last updated?
The NPPES record for Stephen Johnston was last updated on June 17, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.