DR. RONALD ANTHONY ZIMMERMANN (D.O.) – Hospitalist Physician, NPI 1346404985
Hospitalist Physician
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Profile Insights
NPPES metrics only — not quality of care.
8,824 INTERNAL MEDICINE in IL
Provider Addresses for DR. RONALD ANTHONY ZIMMERMANN (D.O.)
405 W Jackson St
Carbondale, IL 629011462
Phone: (618) 549-0721
Type: Location
2 S Hospital Dr
Murphysboro, IL 629663333
Phone: (618) 684-3156
Type: Location
1005 Broadway St
Quincy, IL 623012834
Phone: (217) 223-8400
Type: Location
201 S 14th St
Herrin, IL 629483631
Phone: (618) 942-2171
Fax: (618) 988-6166
Type: Location
1319, Wingfield Way, Bolingbrook, Will County, Illinois, 60490, United States
BOLINGBROOK, IL 604904529
Phone: (630) 863-7026
Type: Mailing
Edward Hospital, 801, South Washington Street, Naperville, DuPage County, Illinois, 60540, United States
NAPERVILLE, IL 605407430
Phone: (630) 646-8704
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: 2011-09-15
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 |
|---|---|---|---|---|
| I20110915000247 | I | Internal 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 651 | 239 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 386 | 362 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 173 | 169 | $0 |
| 99291 | Critical care, first 30-74 minutes | 20 | 18 | $0 |
Insurance plans in this area (ZIP 62901)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| E N D O C R I N O L O G Y | IL | |
| N E U R O L O G Y | IL | |
| Hospitalist, Internal Medicine | IL | |
| O P H T H A L M O L O G Y | IL | |
| - | IL | |
| E N D O C R I N O L O G Y | IL | |
| Cardiovascular Disease (Cardiology), Interventional Cardiology | IL | |
| Clinical Social Worker | IL | |
| Certified Nurse Midwife (Cnm) | IL |
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