diff --git a/src/main/java/com/mirna/hospitalmanagementapi/application/services/PatientServiceImpl.java b/src/main/java/com/mirna/hospitalmanagementapi/application/services/PatientServiceImpl.java
new file mode 100644
index 0000000..335a32f
--- /dev/null
+++ b/src/main/java/com/mirna/hospitalmanagementapi/application/services/PatientServiceImpl.java
@@ -0,0 +1,63 @@
+package com.mirna.hospitalmanagementapi.application.services;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.mirna.hospitalmanagementapi.application.usecase.patient.FindPatientByIdUseCase;
+import com.mirna.hospitalmanagementapi.application.usecase.patient.SavePatientUseCase;
+import com.mirna.hospitalmanagementapi.domain.dtos.patient.PatientDTO;
+import com.mirna.hospitalmanagementapi.domain.entities.Patient;
+import com.mirna.hospitalmanagementapi.domain.services.PatientService;
+import com.mirna.hospitalmanagementapi.infra.handlers.EntityNotFoundErrorHandler;
+
+import jakarta.persistence.EntityNotFoundException;
+
+/**
+ * This class is an implementation of the PatientService interface.
+ *
+ * This class provides methods to perform operations on patients
+ *
+ * @author Mirna Gama
+ * @version 1.0
+ */
+@Service
+public class PatientServiceImpl implements PatientService {
+
+	@Autowired
+	private SavePatientUseCase savePatient;
+	
+	@Autowired
+	private FindPatientByIdUseCase findPatientById;
+	
+	/**
+	 * Adds a new patient to the database.
+	 *
+	 * @param patientDTO A data transfer object containing the data for Patient
+	 *                    entity.
+	 * @return The saved patient if successful, or null if there is an error.
+	 */
+	@Override
+	public Patient addPatient(PatientDTO patientDTO) {
+		Patient patient = new Patient(patientDTO);
+		
+		return this.savePatient.execute(patient);
+	}
+
+	/**
+	 * Finds a stored patient by id.
+	 * 
+	 * @param id A long representing the patient's unique identifier
+	 * @return The corresponding patient if successful, or throws an EntityNotFoundException if it is
+	 *         non-existent.
+	 * @throws EntityNotFoundException When patient with id provided is non-existent   
+	 */
+	@Override
+	public Patient findPatientById(Long id) throws EntityNotFoundException {
+		Patient patient = this.findPatientById.execute(id);
+		
+		if (patient == null) throw new EntityNotFoundException();
+		
+		return patient;
+	}
+
+}
diff --git a/src/main/java/com/mirna/hospitalmanagementapi/domain/services/PatientService.java b/src/main/java/com/mirna/hospitalmanagementapi/domain/services/PatientService.java
new file mode 100644
index 0000000..32ca3b4
--- /dev/null
+++ b/src/main/java/com/mirna/hospitalmanagementapi/domain/services/PatientService.java
@@ -0,0 +1,31 @@
+package com.mirna.hospitalmanagementapi.domain.services;
+
+import com.mirna.hospitalmanagementapi.domain.dtos.patient.PatientDTO;
+import com.mirna.hospitalmanagementapi.domain.entities.Patient;
+
+/**
+ * Patient service interface for managing patient information.
+*
+ * @see Patient
+ * @author Mirna Gama
+ * @version 1.0
+*/
+public interface PatientService {
+
+	/**
+	* Adds a new patient to the repository.
+	* 
+	* @param patientDTO A data transfer object representing a patient to add.
+	* @return The saved patient if successful,  or null if there is an error.
+	*/
+    public Patient addPatient(PatientDTO patientDTO);
+    
+    /**
+	* Finds a stored patient by id.
+	* 
+	* @param id A long representing the patient's unique identifier
+	* @return The corresponding patient if successful, or null if it is non-existent.
+	*/
+    public Patient findPatientById(Long id);
+    
+}