diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index b20e0bd..bfcacb1 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -15,6 +15,7 @@
     'id_map.cpp',
     'journal.cpp',
     'pmbus_utils.cpp',
+    'presence_service.cpp',
     'rail.cpp',
     'sensor_monitoring.cpp',
     'system.cpp',
diff --git a/phosphor-regulators/src/presence_service.cpp b/phosphor-regulators/src/presence_service.cpp
new file mode 100644
index 0000000..7233d28
--- /dev/null
+++ b/phosphor-regulators/src/presence_service.cpp
@@ -0,0 +1,48 @@
+/**
+ * Copyright © 2020 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "presence_service.hpp"
+
+#include "types.hpp"
+#include "utility.hpp"
+
+namespace phosphor::power::regulators
+{
+
+bool DBusPresenceService::isPresent(const std::string& inventoryPath)
+{
+    bool present{false};
+
+    // Try to find cached presence value
+    auto it = cache.find(inventoryPath);
+    if (it != cache.end())
+    {
+        present = it->second;
+    }
+    else
+    {
+        // Get presence from D-Bus interface/property
+        util::getProperty(INVENTORY_IFACE, PRESENT_PROP, inventoryPath,
+                          INVENTORY_MGR_IFACE, bus, present);
+
+        // Cache presence value
+        cache[inventoryPath] = present;
+    }
+
+    return present;
+}
+
+} // namespace phosphor::power::regulators
diff --git a/phosphor-regulators/src/presence_service.hpp b/phosphor-regulators/src/presence_service.hpp
new file mode 100644
index 0000000..142e132
--- /dev/null
+++ b/phosphor-regulators/src/presence_service.hpp
@@ -0,0 +1,112 @@
+/**
+ * Copyright © 2020 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include <sdbusplus/bus.hpp>
+
+#include <map>
+#include <string>
+
+namespace phosphor::power::regulators
+{
+
+/**
+ * @class PresenceService
+ *
+ * Abstract base class that provides an interface to hardware presence data.
+ *
+ * The interface is used to determine whether hardware is present.
+ */
+class PresenceService
+{
+  public:
+    // Specify which compiler-generated methods we want
+    PresenceService() = default;
+    PresenceService(const PresenceService&) = delete;
+    PresenceService(PresenceService&&) = delete;
+    PresenceService& operator=(const PresenceService&) = delete;
+    PresenceService& operator=(PresenceService&&) = delete;
+    virtual ~PresenceService() = default;
+
+    /**
+     * Clears any cached hardware presence data.
+     */
+    virtual void clearCache(void) = 0;
+
+    /**
+     * Returns whether the hardware with the specified inventory path is
+     * present.
+     *
+     * May return a cached value if one is available to improve performance.
+     *
+     * Throws an exception if an error occurs while obtaining the presence
+     * value.
+     *
+     * @param inventoryPath D-Bus inventory path of the hardware
+     * @return true if hardware is present, false otherwise
+     */
+    virtual bool isPresent(const std::string& inventoryPath) = 0;
+};
+
+/**
+ * @class DBusPresenceService
+ *
+ * Implementation of the PresenceService interface using D-Bus method calls.
+ */
+class DBusPresenceService : public PresenceService
+{
+  public:
+    // Specify which compiler-generated methods we want
+    DBusPresenceService() = delete;
+    DBusPresenceService(const DBusPresenceService&) = delete;
+    DBusPresenceService(DBusPresenceService&&) = delete;
+    DBusPresenceService& operator=(const DBusPresenceService&) = delete;
+    DBusPresenceService& operator=(DBusPresenceService&&) = delete;
+    virtual ~DBusPresenceService() = default;
+
+    /**
+     * Constructor.
+     *
+     * @param bus D-Bus bus object
+     */
+    explicit DBusPresenceService(sdbusplus::bus::bus& bus) : bus{bus}
+    {
+    }
+
+    /** @copydoc PresenceService::clearCache() */
+    virtual void clearCache(void) override
+    {
+        cache.clear();
+    }
+
+    /** @copydoc PresenceService::isPresent() */
+    virtual bool isPresent(const std::string& inventoryPath) override;
+
+  private:
+    /**
+     * D-Bus bus object.
+     */
+    sdbusplus::bus::bus& bus;
+
+    /**
+     * Cached presence data.
+     *
+     * Map from inventory paths to presence values.
+     */
+    std::map<std::string, bool> cache{};
+};
+
+} // namespace phosphor::power::regulators
diff --git a/phosphor-regulators/src/services.hpp b/phosphor-regulators/src/services.hpp
index 1e38e7c..8d6fc0d 100644
--- a/phosphor-regulators/src/services.hpp
+++ b/phosphor-regulators/src/services.hpp
@@ -17,6 +17,7 @@
 
 #include "error_logging.hpp"
 #include "journal.hpp"
+#include "presence_service.hpp"
 
 #include <sdbusplus/bus.hpp>
 
@@ -63,6 +64,13 @@
      * @return journal interface
      */
     virtual Journal& getJournal() = 0;
+
+    /**
+     * Returns the interface to hardware presence data.
+     *
+     * @return hardware presence interface
+     */
+    virtual PresenceService& getPresenceService() = 0;
 };
 
 /**
@@ -86,7 +94,8 @@
      *
      * @param bus D-Bus bus object
      */
-    explicit BMCServices(sdbusplus::bus::bus& bus) : bus{bus}, errorLogging{bus}
+    explicit BMCServices(sdbusplus::bus::bus& bus) :
+        bus{bus}, errorLogging{bus}, presenceService{bus}
     {
     }
 
@@ -108,6 +117,12 @@
         return journal;
     }
 
+    /** @copydoc Services::getPresenceService() */
+    virtual PresenceService& getPresenceService() override
+    {
+        return presenceService;
+    }
+
   private:
     /**
      * D-Bus bus object.
@@ -124,6 +139,11 @@
      * journal.
      */
     SystemdJournal journal{};
+
+    /**
+     * Implementation of the PresenceService interface using D-Bus method calls.
+     */
+    DBusPresenceService presenceService;
 };
 
 } // namespace phosphor::power::regulators
diff --git a/phosphor-regulators/test/mock_presence_service.hpp b/phosphor-regulators/test/mock_presence_service.hpp
new file mode 100644
index 0000000..7d2881d
--- /dev/null
+++ b/phosphor-regulators/test/mock_presence_service.hpp
@@ -0,0 +1,47 @@
+/**
+ * Copyright © 2020 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include "presence_service.hpp"
+
+#include <gmock/gmock.h>
+
+namespace phosphor::power::regulators
+{
+
+/**
+ * @class MockPresenceService
+ *
+ * Mock implementation of the PresenceService interface.
+ */
+class MockPresenceService : public PresenceService
+{
+  public:
+    // Specify which compiler-generated methods we want
+    MockPresenceService() = default;
+    MockPresenceService(const MockPresenceService&) = delete;
+    MockPresenceService(MockPresenceService&&) = delete;
+    MockPresenceService& operator=(const MockPresenceService&) = delete;
+    MockPresenceService& operator=(MockPresenceService&&) = delete;
+    virtual ~MockPresenceService() = default;
+
+    MOCK_METHOD(void, clearCache, (), (override));
+
+    MOCK_METHOD(bool, isPresent, (const std::string& inventoryPath),
+                (override));
+};
+
+} // namespace phosphor::power::regulators
diff --git a/phosphor-regulators/test/mock_services.hpp b/phosphor-regulators/test/mock_services.hpp
index 075768c..1ef7192 100644
--- a/phosphor-regulators/test/mock_services.hpp
+++ b/phosphor-regulators/test/mock_services.hpp
@@ -19,6 +19,8 @@
 #include "journal.hpp"
 #include "mock_error_logging.hpp"
 #include "mock_journal.hpp"
+#include "mock_presence_service.hpp"
+#include "presence_service.hpp"
 #include "services.hpp"
 
 #include <sdbusplus/bus.hpp>
@@ -60,6 +62,12 @@
         return journal;
     }
 
+    /** @copydoc Services::getPresenceService() */
+    virtual PresenceService& getPresenceService() override
+    {
+        return presenceService;
+    }
+
     /**
      * Returns the MockErrorLogging object that implements the ErrorLogging
      * interface.
@@ -85,6 +93,19 @@
         return journal;
     }
 
+    /**
+     * Returns the MockPresenceService object that implements the
+     * PresenceService interface.
+     *
+     * This allows test cases to use the object in EXPECT_CALL() statements.
+     *
+     * @return mock presence service object
+     */
+    virtual MockPresenceService& getMockPresenceService()
+    {
+        return presenceService;
+    }
+
   private:
     /**
      * D-Bus bus object.
@@ -100,6 +121,11 @@
      * Mock implementation of the Journal interface.
      */
     MockJournal journal{};
+
+    /**
+     * Mock implementation of the PresenceService interface.
+     */
+    MockPresenceService presenceService{};
 };
 
 } // namespace phosphor::power::regulators