PROVIDER PROFILE · NPI 1346235595
Roger ShammasM.D.
CROSS-REFERENCE
Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 42 inbound referrers · 86 outbound destinations.
| Physician | Patients | Visits |
|---|---|---|
| ADVANTAGE HEALTH/SAINT MARY'S MEDICAL GROUP | 197 | 482 |
| STRAUSS, MARK | 75 | 133 |
| Gregory Miller Cardiology · Grand Rapids, MI | 62 | 148 |
| Nishant Kalra Interventional Cardiology · Grand Rapids, MI | 55 | 172 |
| Jennifer Rollenhagen Diagnostic Radiology · Grand Rapids, MI | 50 | 99 |
| WOLFSON, JEFFREY | 44 | 125 |
| Zdravko Skrtic Diagnostic Radiology · Grand Rapids, MI | 44 | 85 |
| Matthew Tiede Diagnostic Radiology · Wyoming, MI | 43 | 91 |
| WILLIAMS, CHAD | 33 | 55 |
| NPI 1457346678 | 32 | 85 |
| Kristopher Selke Interventional Cardiology · Green Bay, WI | 31 | 68 |
| SPECTRUM HEALTH PRIMARY CARE PARTNERS | 31 | 61 |
| Physician | Patients | Visits |
|---|---|---|
| SAINT MARY'S HEALTH SERVICES | 582 | 3,159 |
| REGENTS OF THE UNIVERSITY OF MICHIGAN | 337 | 792 |
| ADVANTAGE HEALTH/SAINT MARY'S MEDICAL GROUP | 204 | 500 |
| SPECTRUM HEALTH HOSPITALS | 147 | 409 |
| Gregory Pellizzon Interventional Cardiology · Fredericksburg, VA | 68 | 167 |
| Michael Paciorek Diagnostic Radiology · Grand Rapids, MI | 53 | 102 |
| PAWLOSKI, MAUREEN | 52 | 267 |
| Mark Rapoport Diagnostic Radiology · Grand Rapids, MI | 49 | 96 |
| Life Ems Inc Ambulance Service Provider · Grand Rapids, MI | 48 | 81 |
| Nishant Kalra Interventional Cardiology · Grand Rapids, MI | 48 | 142 |
| WOLFSON, JEFFREY | 47 | 127 |
| Gregory Miller Cardiology · Grand Rapids, MI | 46 | 142 |