Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

General Surgery

Justin P. Dux, MD

Works at hospitals in Oconomowoc, WI · Waukesha, WI · Wisconsin

Summary

Dr. Justin P. Dux, MD is a general surgeon at 1111 Delafield St, Suite 209, Waukesha, WI 53188. Phone: (262) 542-0444. Accepts Medicare assignment. In 2024, Justin P. Dux had 294 Original Medicare patients and 519 services. NPI 1518209022. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Justin P. Dux, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Justin P. Dux accept Medicare assignment?
Yes. Medicare's clinician data says Justin P. Dux accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Justin P. Dux see?
In 2024, CMS data shows 294 Original Medicare patients and 519 services for Justin P. Dux. This counts Original Medicare only and measures volume, not quality.
What is Justin P. Dux's NPI number?
1518209022. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Justin P. Dux, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients294
Services billed to Medicare519
Different services or procedures78
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Ultrasound of both sides of head and neck blood flow (93880)89 services
  2. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)83 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)36 services
  4. Ultrasound study of arm and leg arteries (93922)29 services
  5. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)29 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis49%
  • Ischemic heart disease41%
  • Chronic kidney disease39%
  • Atrial fibrillation33%

Hospitals where Justin P. Dux works

Medicare's Facility Affiliation Data lists Justin P. Dux at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Justin P. Dux is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Justin P. Dux as a member of this group (CMS data updated October 2, 2026).

  • Waukesha Surgical Specialists, S.C.18 clinicians in the group

Specialties

Find other General Surgery doctors in Wisconsin →

Other general surgeons in Waukesha

Clinicians with the same Medicare primary specialty in Waukesha, WI — not a recommendation.

All general surgeons in Waukesha →

Other clinicians in Waukesha Surgical Specialists, S.C.

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolMedical College Of Wisconsin
Graduation year2013 (13 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1518209022
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians