diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ActionValidation.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ActionValidation.kt
index dcd0410ab..feabf2657 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ActionValidation.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ActionValidation.kt
@@ -28,6 +28,7 @@ class ActionValidation(
             "read_only" -> ValidateReadOnly(settings, clusterService, jvmService).execute(indexName)
             "read_write" -> ValidateReadWrite(settings, clusterService, jvmService).execute(indexName)
             "replica_count" -> ValidateReplicaCount(settings, clusterService, jvmService).execute(indexName)
+            "index_priority" -> ValidateIndexPriority(settings, clusterService, jvmService).execute(indexName)
             else -> {
                 // temporary call until all actions are mapped
                 ValidateNothing(settings, clusterService, jvmService).execute(indexName)
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateIndexPriority.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateIndexPriority.kt
new file mode 100644
index 000000000..1ecde743e
--- /dev/null
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateIndexPriority.kt
@@ -0,0 +1,57 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.indexmanagement.indexstatemanagement.validation
+
+import org.apache.logging.log4j.LogManager
+import org.opensearch.cluster.metadata.IndexMetadata
+import org.opensearch.cluster.service.ClusterService
+import org.opensearch.common.settings.Settings
+import org.opensearch.indexmanagement.util.OpenForTesting
+import org.opensearch.indexmanagement.spi.indexstatemanagement.Validate
+import org.opensearch.monitor.jvm.JvmService
+
+@OpenForTesting
+class ValidateIndexPriority(
+    settings: Settings,
+    clusterService: ClusterService,
+    jvmService: JvmService
+) : Validate(settings, clusterService, jvmService) {
+
+    private val logger = LogManager.getLogger(javaClass)
+
+    @Suppress("ReturnSuppressCount", "ReturnCount")
+    override fun execute(indexName: String): Validate {
+        // if these conditions are false, fail validation and do not execute index_priority action
+        if (hasReadOnlyAllowDeleteBlock(indexName)) {
+            return this
+        }
+        validationMessage = getValidationPassedMessage(indexName)
+        return this
+    }
+
+    fun hasReadOnlyAllowDeleteBlock(indexName: String): Boolean {
+        val readOnlyAllowDeleteBlock = settings.get(IndexMetadata.SETTING_READ_ONLY_ALLOW_DELETE)
+        if (!readOnlyAllowDeleteBlock.isNullOrEmpty() && readOnlyAllowDeleteBlock.toBoolean()) {
+            val message = getReadOnlyAllowDeleteBlockMessage(indexName)
+            logger.warn(message)
+            validationStatus = ValidationStatus.FAILED
+            return true
+        }
+        return false
+    }
+
+    @Suppress("TooManyFunctions")
+    companion object {
+        const val name = "validate_index_priority"
+        fun getReadOnlyAllowDeleteBlockMessage(index: String) = "read_only_allow_delete block is not null for index [index=$index]"
+        fun getValidationPassedMessage(index: String) = "Index Priority action validation passed for [index=$index]"
+    }
+}
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateIndexPriorityIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateIndexPriorityIT.kt
new file mode 100644
index 000000000..c3a8ce71b
--- /dev/null
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateIndexPriorityIT.kt
@@ -0,0 +1,66 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.indexmanagement.indexstatemanagement.validation
+
+import org.opensearch.indexmanagement.indexstatemanagement.IndexStateManagementRestTestCase
+import org.opensearch.indexmanagement.indexstatemanagement.action.IndexPriorityAction
+import org.opensearch.indexmanagement.indexstatemanagement.model.Policy
+import org.opensearch.indexmanagement.indexstatemanagement.model.State
+import org.opensearch.indexmanagement.indexstatemanagement.randomErrorNotification
+import org.opensearch.indexmanagement.spi.indexstatemanagement.Validate
+import org.opensearch.indexmanagement.waitFor
+import java.time.Instant
+import java.time.temporal.ChronoUnit
+import java.util.Locale
+
+class ValidateIndexPriorityIT : IndexStateManagementRestTestCase() {
+    private val testIndexName = javaClass.simpleName.lowercase(Locale.ROOT)
+
+    fun `test basic index priority`() {
+        val indexName = "${testIndexName}_index_1"
+        val policyID = "${testIndexName}_testPolicyName_1"
+        val actionConfig = IndexPriorityAction(50, 0)
+        val states = listOf(State(name = "SetPriorityState", actions = listOf(actionConfig), transitions = listOf()))
+        val policy = Policy(
+            id = policyID,
+            description = "$testIndexName description",
+            schemaVersion = 1L,
+            lastUpdatedTime = Instant.now().truncatedTo(ChronoUnit.MILLIS),
+            errorNotification = randomErrorNotification(),
+            defaultState = states[0].name,
+            states = states
+        )
+
+        createPolicy(policy, policyID)
+        createIndex(indexName, policyID)
+
+        val managedIndexConfig = getExistingManagedIndexConfig(indexName)
+        // Change the runJob start time so the job will trigger in 2 seconds
+        updateManagedIndexConfigStartTime(managedIndexConfig)
+
+        // ism policy initialized
+        waitFor { assertEquals(policyID, getExplainManagedIndexMetaData(indexName).policyID) }
+
+        // change the runJob start time to change index priority
+        updateManagedIndexConfigStartTime(managedIndexConfig)
+
+        waitFor { assertEquals("Index did not set index_priority to ${actionConfig.indexPriority}", actionConfig.indexPriority, getIndexPrioritySetting(indexName)) }
+
+        waitFor {
+            val data = getExplainValidationResult(indexName)
+            assertEquals(
+                "Index Priority action validation status is PASSED.",
+                Validate.ValidationStatus.PASSED,
+                data.validationStatus
+            )
+        }
+    }
+}