DR. ARGYRO SYLVIA HATSERAS (M.D.) – Critical Care Medicine (Internal Medicine) Physician, NPI 1194791871
Critical Care Medicine (Internal Medicine) Physician
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NPPES metrics only — not quality of care.
411 CRITICAL CARE (INTENSIVISTS) in WI
Provider Addresses for DR. ARGYRO SYLVIA HATSERAS (M.D.)
945 N 12TH ST
MILWAUKEE, WI 532331305
Phone: (414) 219-2000
Fax: (414) 219-6161
Type: Location
800 Biesterfield Rd Ste 510
Elk Grove Village, IL 600073367
Phone: (847) 437-5500
Type: Location
9907 Southwest Hwy
Oak Lawn, IL 604533723
Phone: (708) 636-3113
Fax: (708) 636-5517
Type: Location
2900 W OKLAHOMA AVE
MILWAUKEE, WI 532154330
Phone: (414) 649-6000
Type: Location
3301 W FOREST HOME AVE
MILWAUKEE, WI 532152843
Phone:
Type: Mailing
PO BOX 735044
CHICAGO, IL 606735044
Phone: (800) 326-2250
Type: Mailing
202, East Ogden Avenue, Westmont, DuPage County, Illinois, 60559, United States
WESTMONT, IL 605591296
Phone: (630) 789-9785
Fax: (630) 789-9798
Type: Mailing
9907, Southwest Highway, Oak Lawn, Worth Township, Cook County, Illinois, 60453, United States
OAK LAWN, IL 604533723
Phone: (708) 636-3113
Fax: (708) 636-5517
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: 2011-10-21
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20060113000691 | I | Pulmonary Disease | IL | TBD |
| I20111021000497 | I | Critical Care (Intensivists) | WI | 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 |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 41 | 23 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 23 | 14 | $0 |
Insurance plans in this area (ZIP 53233)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | WI | |
| Family Practice | WI | |
| Family Practice | IL | |
| Geriatric Medicine, Internal Medicine | WI | |
| - | WI | |
| - | WI | |
| - | IL | |
| Family Practice | WI | |
| - | OH | |
| - | WI |
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