REFERRAL NETWORK
Where Robert Hartmann's patients come from & go
Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 19 inbound referrers · 0 outbound destinations.
Receives referrals from
Inbound — who sends patients here
| Physician | Patients | Visits |
|---|
| SUTTER VALLEY HOSPITALS | 274 | 1,299 |
| Philip Granchi Diagnostic Radiology · Brandon, FL | 157 | 587 |
| Gholamreza Pourzia Cardiology · Jackson, CA | 51 | 220 |
| UNITED HOMECARE OF NORTHERN CALIFORNIA, LC | 44 | 149 |
| BRUCE, DAVID | 42 | 61 |
| FRONK, STEVEN | 30 | 51 |
| Prabhir Singh Hospitalist · Sacramento, CA | 28 | 175 |
| Kenny Charn Cardiology · Jackson, CA | 27 | 63 |
| Richard Vanbuskirk Optometry · Jackson, CA | 21 | 39 |
| David Beffa General Surgery · Sacramento, CA | 20 | 51 |
| KERR, DARREL | 19 | 36 |
| Donald Vanfossan Neurology · Jackson, CA | 18 | 85 |
Refers patients to
Outbound — where patients go next
No outbound pairs above the suppression threshold.
Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.