Doctor profile · Federal record

Dr. Mark Vaselakos, D.O.

Emergency Medicine Physician · Emergency Medicine Physician · Milwaukee, WI

  • NPI 1295754257
  • 20 yrs on file
  • Licensed in 2 states
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
111 E Wisconsin Ave
Milwaukee, WI 532024815
(414) 290-6720
fax (414) 290-6755

Credentials & registration

NPPES · NUCC
NPI registered
July 2006 — 20 yrs on file
Profile last updated
May 8, 2024
Specialty taxonomy
207P00000X — NUCC code
State licenses (2)
Illinois #036-108833 · Wisconsin #53614-21
Medicaid
IL #036108833

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1295754257. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
337
Distinct HCPCS
5
Medicare allowed
$41,696
HCPCS Description Services Patients Avg allowed
99284 Emergency department visit with moderate level of medical decision making 155 144 $119
99285 Emergency department visit with high level of medical decision making 84 81 $175
99283 Emergency department visit with low level of medical decision making 69 68 $72
99282 Emergency department visit with straightforward medical decision making 15 15 $42
99291 Critical care, first 30-74 minutes 14 14 $210

In context: peer comparison

Among 117 peers in this city , average services per provider: 82. This provider delivers 4.1× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
87
Patients
86
Total drug cost
$654
Drug Type Claims Patients Total cost
Cephalexin Generic 22 22 $225
Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) Brand 18 18 $211
Prednisone Generic 18 18 $88
Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) Brand 15 15 $69
Ondansetron Odt (Ondansetron) Brand 14 13 $62

Frequently asked questions

Auto-generated from federal data
What is Dr. Mark Vaselakos's medical specialty?
Dr. Mark Vaselakos practices Emergency Medicine Physician in Milwaukee, WI.
Where does Dr. Mark Vaselakos practice?
Dr. Mark Vaselakos practices at 111 E Wisconsin Ave, Milwaukee, WI 532024815. Office phone: 4142906720.
What is Dr. Mark Vaselakos's NPI?
Dr. Mark Vaselakos's National Provider Identifier (NPI) is 1295754257, issued by NPPES.
What procedures does Dr. Mark Vaselakos commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with low level of medical decision making (HCPCS 99283). Source: CMS Medicare Physician & Other Practitioners file.