diff --git a/check_opd_master.php b/check_opd_master.php
new file mode 100644
index 0000000..a7dcb05
--- /dev/null
+++ b/check_opd_master.php
@@ -0,0 +1,9 @@
+<?php
+$db = new mysqli('localhost', 'root', '', 'hms_data_ci4');
+$res = $db->query("SHOW COLUMNS FROM opd_master");
+$cols = [];
+while ($row = $res->fetch_assoc()) { $cols[] = $row['Field']; }
+echo implode(', ', $cols) . "\n---\n";
+$res2 = $db->query("SELECT opd_id, opd_code, p_id, P_name, opd_book_date, running_opd, running_opd_id, no_visit FROM opd_master WHERE p_id = 11 ORDER BY opd_id DESC LIMIT 5");
+while ($row = $res2->fetch_assoc()) { print_r($row); }
+$db->close();
diff --git a/check_opd_visit_list.php b/check_opd_visit_list.php
new file mode 100644
index 0000000..8ec2fb1
--- /dev/null
+++ b/check_opd_visit_list.php
@@ -0,0 +1,8 @@
+<?php
+$db = new mysqli('localhost', 'root', '', 'hms_data_ci4');
+$res = $db->query("SHOW COLUMNS FROM opd_visit_list");
+while ($row = $res->fetch_assoc()) { echo $row['Field'] . "\n"; }
+echo "---\n";
+$res2 = $db->query("SELECT * FROM opd_visit_list WHERE p_id = 11 ORDER BY id DESC LIMIT 5");
+while ($row = $res2->fetch_assoc()) { print_r($row); }
+$db->close();
diff --git a/check_other_test_patients.php b/check_other_test_patients.php
new file mode 100644
index 0000000..5e609b0
--- /dev/null
+++ b/check_other_test_patients.php
@@ -0,0 +1,21 @@
+<?php
+$db = new mysqli('localhost', 'root', '', 'hms_data_ci4');
+
+echo "=== Patients with non-empty abha_address (excluding the known test patient id=15) ===\n";
+$sql = "SELECT id, p_fname, p_lname, abha_address
+        FROM patient_master
+        WHERE abha_address IS NOT NULL AND abha_address != '' AND id != 15
+        ORDER BY id DESC
+        LIMIT 20";
+$res = $db->query($sql);
+while ($row = $res->fetch_assoc()) {
+    print_r($row);
+}
+
+echo "\n=== hospital_setting HFR-related keys ===\n";
+$res2 = $db->query("SELECT s_name, s_value FROM hospital_setting WHERE s_name LIKE '%HFR%' OR s_name LIKE '%ABDM%'");
+while ($row = $res2->fetch_assoc()) {
+    print_r($row);
+}
+
+$db->close();
diff --git a/check_patient11_history.php b/check_patient11_history.php
new file mode 100644
index 0000000..f4f484a
--- /dev/null
+++ b/check_patient11_history.php
@@ -0,0 +1,9 @@
+<?php
+$db = new mysqli('localhost', 'root', '', 'hms_data_ci4');
+$abha = '91510165305101@sbx';
+$res = $db->query("SELECT id, operation, workflow_state, status, http_code, request_id, gateway_request_id, created_at, updated_at, completed_at FROM abdm_hiu_workflows WHERE abha_address = '{$abha}' ORDER BY id ASC");
+while ($row = $res->fetch_assoc()) { print_r($row); }
+echo "\n=== doc count ===\n";
+$res2 = $db->query("SELECT COUNT(*) as c FROM abdm_hiu_documents WHERE abha_address = '{$abha}'");
+print_r($res2->fetch_assoc());
+$db->close();
diff --git a/compare_abha_operations.php b/compare_abha_operations.php
new file mode 100644
index 0000000..090d4b0
--- /dev/null
+++ b/compare_abha_operations.php
@@ -0,0 +1,11 @@
+<?php
+$db = new mysqli('localhost', 'root', '', 'hms_data_ci4');
+$abha = 'meerabisht1981@sbx';
+echo "=== Distinct operations ever seen for {$abha} ===\n";
+$res = $db->query("SELECT operation, COUNT(*) c FROM abdm_hiu_workflows WHERE abha_address = '{$abha}' GROUP BY operation");
+while ($row = $res->fetch_assoc()) { print_r($row); }
+
+echo "\n=== Compare: patient 11 ABHA operations (for reference) ===\n";
+$res2 = $db->query("SELECT operation, COUNT(*) c FROM abdm_hiu_workflows WHERE abha_address = '91510165305101@sbx' GROUP BY operation");
+while ($row = $res2->fetch_assoc()) { print_r($row); }
+$db->close();
diff --git a/find_opd_tables.php b/find_opd_tables.php
new file mode 100644
index 0000000..b3a4b00
--- /dev/null
+++ b/find_opd_tables.php
@@ -0,0 +1,9 @@
+<?php
+$db = new mysqli('localhost', 'root', '', 'hms_data_ci4');
+
+echo "=== OPD visits for patient_id = 11 ===\n";
+$res = $db->query("SHOW TABLES LIKE '%opd%'");
+while ($row = $res->fetch_assoc()) {
+    print_r($row);
+}
+$db->close();