PROVIDER PROFILE · NPI 1952392482
John O'brienM.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). 201 inbound referrers · 0 outbound destinations.
| Physician | Patients | Visits |
|---|---|---|
| Director Of Finance-County Of Fairfax Va Ambulance Service Provider · Fairfax, VA | 394 | 664 |
| Quest Diagnostics Incorporated Md Clinical Laboratory · Baltimore, MD | 292 | 740 |
| MEDICAL TRANSPORTATION SERVICES, LLC | 139 | 211 |
| Kathryn Grumbach Diagnostic Radiology · Fairfax, VA | 132 | 205 |
| Ingrid Schneider Diagnostic Radiology · Fairfax, VA | 125 | 231 |
| John Ruff Diagnostic Radiology · Fairfax, VA | 92 | 142 |
| Wei Shen Griggs Diagnostic Radiology · Fairfax, VA | 88 | 180 |
| Marianne Shih Diagnostic Radiology · Fairfax, VA | 85 | 123 |
| TWIBLE, DANA | 77 | 109 |
| INOVA HEALTH CARE SERVICES | 77 | 145 |
| SEARS-ROGAN, PAMELA | 71 | 133 |
| Luke Yao Diagnostic Radiology · Fairfax, VA | 69 | 121 |