MARY TOSIOU (M.D.) – Emergency Medicine Physician, NPI 1801811294
Emergency Medicine Physician
Main info
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for MARY TOSIOU (M.D.)
75 REMIT DRIVE
LOCKBOX 1209
CHICAGO, IL 606751209
Phone: (866) 916-5259
Fax: (231) 922-4030
Type: Mailing
MacNeal Hospital, 3249, Oak Park Avenue, Berwyn, Cook County, Illinois, 60402, United States
BERWYN, IL 604023429
Phone: (708) 783-9100
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2009-02-27
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090227000234 | I | Emergency Medicine | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99285 | Emergency department visit with high level of medical decision making | 163 | 154 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 161 | 142 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 36 | 36 | $0 |
| 99291 | Critical care, first 30-74 minutes | 31 | 31 | $0 |
Insurance plans in this area (ZIP 60675)
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