DR. GREGORY GEORGE OLMSTED (M.D.) – Emergency Medicine Physician, NPI 1245597210
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,845 EMERGENCY MEDICINE in IL
Provider Addresses for DR. GREGORY GEORGE OLMSTED (M.D.)
451 W HURON ST
APT 1207
CHICAGO, IL 606544567
Phone: (708) 533-5336
Type: Mailing
1423 CHICAGO RD
CHICAGO HEIGHTS, IL 604113400
Phone: (708) 756-1000
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: 2016-03-23
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 |
|---|---|---|---|---|
| I20160323002398 | I | Emergency Medicine | AZ | 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 |
|---|---|---|---|---|
| 99284 | Emergency department visit with moderate level of medical decision making | 165 | 155 | $0 |
| 99285 | Emergency department visit with high level of medical decision making | 65 | 63 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 53 | 50 | $0 |
Insurance plans in this area (ZIP 60654)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | AZ | |
| Emergency Medicine | AZ | |
| Emergency Medicine | TX | |
| Family Practice | AZ | |
| Family Practice, Emergency Medicine | GA | |
| Emergency Medicine | AZ | |
| Emergency Medicine | CA | |
| Emergency Medicine | AZ | |
| Family Practice, Emergency Medicine | AZ | |
| Emergency Medicine | CA |
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