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MARK G VASELAKOS D.O.
NPI 1295754257
Emergency Medicine in Milwaukee, WI

Active since July 19, 2006PECOS Enrolled
111 E WISCONSIN AVE, MILWAUKEE, WI 53202(414) 290-6720(414) 290-6755 Get Directions Write a Review

NPPES record last updated: May 8, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mark G Vaselakos D.o. NPPES

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

MARK G VASELAKOS D.O. (NPI 1295754257) is an individual emergency medicine provider in Milwaukee, Wisconsin, licensed in Illinois (036-108833) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1295754257
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameMARK G VASELAKOSCredential: D.O.
Location Address111 E WISCONSIN AVEMilwaukee, WI 53202-4815
Mailing Address111 E Wisconsin AveMilwaukee, WI 53202-4815 · (414) 290-6720 · Fax (414) 290-6755
Phone(414) 290-6720
Fax(414) 290-6755
Sole ProprietorNo
Enumeration DateJuly 19, 2006
Last NPPES UpdateMay 8, 2024
NPPES CertifiedMay 8, 2024
✔ NPI 1295754257 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in IL · 036-108833✔ Licensed in WI · 53614-21
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
111 E WISCONSIN AVE, Milwaukee, WI 53202
Open in Google Maps ↗

Other Identifiers 2

Medicaid036108833IL
OtherP00083469IL · Medicare Railroad

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare), Group Health Cooperative-SCW.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark G Vaselakos D.o. 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 Mark Vaselakos reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emergency Medicine Specialists, S.C.
14 mi
Emergency Medicine
10625 W NORTH AVE, SUITE 102
Milwaukee, WI 53226
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: Emergency Medicine Specialists Sc
  • 244 clinicians in this Medicare group
NPI 1568413524 (414) 877-5350
Vituity-Wisconsin Em Sc
33 mi
Emergency Medicine
9555 76TH ST
Pleasant Prairie, WI 53158
  • Reassigned Medicare billing, Wisconsin enrollment
  • 104 clinicians in this Medicare group
NPI 1326730664 (262) 577-8000

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 4

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.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
133 services121 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
116 services108 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
65 services61 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53202 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
$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.

ADAM C ANKRUM D.O.
Emergency Medicine
111 E WISCONSIN AVE, SUITE 2000
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
ROBERT J HALLOCK M.D.
Emergency Medicine
111 E WISCONSIN AVE, SUITE 2000
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
ANDREA D GRANSEE APNP
Nurse Practitioner
111 E WISCONSIN AVE, SUITE 2000
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
DR. ANDREW W HARRON D.O.
Radiology (Diagnostic Radiology)
111 E WISCONSIN AVE
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
WILLIAM T TUCKER M.D.
Emergency Medicine
111 E WISCONSIN AVE
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
TERRANCE L OTZELBERGER PA-C
Physician Assistant
111 E WISCONSIN AVE
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
JULIE A BURANOSKY M.D.
Emergency Medicine
111 E WISCONSIN AVE, SUITE 2000
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720
STEVEN S KANTOR M.D.
Emergency Medicine
111 E WISCONSIN AVE
MILWAUKEE, WI 53202
Milwaukee County (414) 290-6720

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 Mark Vaselakos's NPI number?

The NPI number for Mark Vaselakos is 1295754257. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is Mark Vaselakos located?

Mark Vaselakos practices at 111 E Wisconsin Ave, Milwaukee, WI 53202. The listed phone number is (414) 290-6720.

What is Mark Vaselakos's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Mark Vaselakos enrolled in Medicare?

Yes. Mark Vaselakos is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Vaselakos's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Vaselakos reassigns Medicare benefits to 2 organizations: Emergency Medicine Specialists, S.C. (Milwaukee, WI) and Vituity-Wisconsin Em Sc (Pleasant Prairie, 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 Mark Vaselakos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Vaselakos accept?

Health plans from CareSource (Common Ground Healthcare) and Group Health Cooperative-SCW list Mark Vaselakos 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.

When was this NPI record last updated?

The NPPES record for Mark Vaselakos was last updated on May 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.