PROVIDER PROFILE · NPI 1043233166
John WalczykM.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). 13 inbound referrers · 25 outbound destinations.
| Physician | Patients | Visits |
|---|---|---|
| David Silvers Pathology · New York, NY | 138 | 195 |
| Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Melville, NY | 87 | 192 |
| Northwell Health Laboratories Clinical Laboratory · New Hyde Park, NY | 84 | 144 |
| MOUNT SINAI HOSPITAL | 48 | 66 |
| NORTH SHORE UNIVERSITY HOSPITAL | 42 | 60 |
| Sunrise Medical Laboratories, Inc. Clinical Laboratory · Hicksville, NY | 32 | 68 |
| ST. FRANCIS HOSPITAL | 30 | 54 |
| David Hoch Clinical Cardiac Electrophysiology · Roslyn, NY | 22 | 29 |
| Laboratory Corporation Of America Holdings Clinical Laboratory · Raritan, NJ | 19 | 31 |
| Robert Broderick Ophthalmology · Manhasset, NY | 16 | 19 |
| Bioreference Health, Llc Clinical Laboratory · Elmwood Park, NJ | 12 | 15 |
| ENZO CLINICAL LABS, INC. | 11 | 22 |
| Physician | Patients | Visits |
|---|---|---|
| David Silvers Pathology · New York, NY | 165 | 210 |
| Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Melville, NY | 92 | 191 |
| Northwell Health Laboratories Clinical Laboratory · New Hyde Park, NY | 85 | 152 |
| Sameera Husain Pathology · New York, NY | 81 | 96 |
| NORTH SHORE UNIVERSITY HOSPITAL | 34 | 50 |
| Sunrise Medical Laboratories, Inc. Clinical Laboratory · Hicksville, NY | 30 | 61 |
| MOUNT SINAI HOSPITAL | 29 | 38 |
| ST. FRANCIS HOSPITAL | 26 | 48 |
| Laboratory Corporation Of America Holdings Clinical Laboratory · Raritan, NJ | 22 | 33 |
| George Niedt Pathology · New York, NY | 20 | 23 |
| NYU LANGONE HOSPITALS | 17 | 28 |
| David Hoch Clinical Cardiac Electrophysiology · Roslyn, NY | 17 | 23 |