| NPI | LastName | FirstName | MidName | Organization | Mailing Address | City | State | Zip |
| 1326489592 | A & A HEARING GROUP, LLC | 1700 KINGFISHER DR | FREDERICK | MD | 217014775 | |||
| 1366610909 | CASTLE HEARING CENTER, INC | 801 TOLL HOUSE AVE | FREDERICK | MD | 217014564 | |||
| 1891849717 | CASTLE | SANDRA | BARNES | 801 TOLL HOUSE AVE | FREDERICK | MD | 217014564 | |
| 1528366382 | PIRTLE | CAROLINE | ANNE | 1700 KINGFISHER DR | FREDERICK | MD | 217014775 |