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Internal Medicine

Marcy L. McAdoo, MD

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

Summary

Dr. Marcy L. McAdoo, MD is an internal medicine doctor at 17000 W N Ave, Suite 110e, Brookfield, WI 53005. Phone: (262) 786-8199. Accepts Medicare assignment. In 2024, Marcy L. McAdoo had 238 Original Medicare patients and 600 services. NPI 1164434023. 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 Marcy L. McAdoo, 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 Marcy L. McAdoo accept Medicare assignment?
Yes. Medicare's clinician data says Marcy L. McAdoo 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 Marcy L. McAdoo see?
In 2024, CMS data shows 238 Original Medicare patients and 600 services for Marcy L. McAdoo. This counts Original Medicare only and measures volume, not quality.
What is Marcy L. McAdoo's NPI number?
1164434023. 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 Marcy L. McAdoo, 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 patients238
Services billed to Medicare600
Different services or procedures38
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)230 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)110 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)106 services
  4. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)21 services
  5. Administration of influenza virus vaccine (G0008)11 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 pressure65%
  • High cholesterol62%
  • Arthritis41%
  • Ischemic heart disease24%
  • Atrial fibrillation21%
  • Chronic kidney disease19%

Hospitals where Marcy L. McAdoo works

Medicare's Facility Affiliation Data lists Marcy L. McAdoo 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 Marcy L. McAdoo is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Marcy L. McAdoo as a member of this group (CMS data updated October 2, 2026).

  • Ascension Medical Group-Southeast Wisconsin Inc545 clinicians in the group

Specialties

Find other Internal Medicine doctors in Wisconsin →

Other internal medicine doctors in Brookfield

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

All internal medicine doctors in Brookfield →

Other clinicians in Ascension Medical Group-Southeast Wisconsin Inc

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

Clinician information

CredentialMD
Medical schoolLouisiana State University School Of Medicine In New Orleans
Graduation year1985 (41 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1164434023
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