STEPHEN LARSON (MD) – Emergency Medicine Physician, NPI 1386755775
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,351 EMERGENCY MEDICINE in MO
Loading map...
Provider Addresses for STEPHEN LARSON (MD)
Oak Brook Post Office, 1314, Kensington Road, Oak Brook, DuPage County, Illinois, 60523, United States
OAK BROOK, IL 605224853
Phone: (314) 344-6000
Type: Mailing
Paul Mayer Avenue, Bridgeton, Saint Louis County, Missouri, 63044, United States
BRIDGETON, MO 630442512
Phone: (314) 344-6000
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
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: 2013-10-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2023-10-31 (952 days ago).
Enrollment records
2
Earliest due date
2023-10-31
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 |
|---|---|---|---|---|
| I20130128000323 | I | Emergency Medicine | GA | TBD |
| I20131008000723 | I | Emergency Medicine | SC | 2023-10-31 |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
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 | 140 | 133 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 76 | 76 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 16 | 16 | $0 |
| 99291 | Critical care, first 30-74 minutes | 13 | 12 | $0 |
Insurance plans in this area (ZIP 60522)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | GA | |
| Physician Assistant | GA | |
| Physician Assistant | SC | |
| Physician Assistant | GA | |
| Physician Assistant | NC |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.