diff --git a/phosphor-regulators/src/config_file_parser.cpp b/phosphor-regulators/src/config_file_parser.cpp
index cdf758e..791f3f7 100644
--- a/phosphor-regulators/src/config_file_parser.cpp
+++ b/phosphor-regulators/src/config_file_parser.cpp
@@ -108,9 +108,8 @@
     }
     else if (element.contains("i2c_write_byte"))
     {
-        // TODO: Not implemented yet
-        // action = parseI2CWriteByte(element["i2c_write_byte"]);
-        // ++propertyCount;
+        action = parseI2CWriteByte(element["i2c_write_byte"]);
+        ++propertyCount;
     }
     else if (element.contains("i2c_write_bytes"))
     {
@@ -220,6 +219,36 @@
     return std::make_unique<I2CWriteBitAction>(reg, position, value);
 }
 
+std::unique_ptr<I2CWriteByteAction> parseI2CWriteByte(const json& element)
+{
+    verifyIsObject(element);
+    unsigned int propertyCount{0};
+
+    // Required register property
+    const json& regElement = getRequiredProperty(element, "register");
+    uint8_t reg = parseStringToUint8(regElement);
+    ++propertyCount;
+
+    // Required value property
+    const json& valueElement = getRequiredProperty(element, "value");
+    uint8_t value = parseStringToUint8(valueElement);
+    ++propertyCount;
+
+    // Optional mask property
+    uint8_t mask = 0xff;
+    auto maskIt = element.find("mask");
+    if (maskIt != element.end())
+    {
+        mask = parseStringToUint8(*maskIt);
+        ++propertyCount;
+    }
+
+    // Verify no invalid properties exist
+    verifyPropertyCount(element, propertyCount);
+
+    return std::make_unique<I2CWriteByteAction>(reg, value, mask);
+}
+
 std::unique_ptr<PMBusWriteVoutCommandAction>
     parsePMBusWriteVoutCommand(const json& element)
 {
diff --git a/phosphor-regulators/src/config_file_parser.hpp b/phosphor-regulators/src/config_file_parser.hpp
index f96e6b4..abfa4f5 100644
--- a/phosphor-regulators/src/config_file_parser.hpp
+++ b/phosphor-regulators/src/config_file_parser.hpp
@@ -18,6 +18,7 @@
 #include "action.hpp"
 #include "chassis.hpp"
 #include "i2c_write_bit_action.hpp"
+#include "i2c_write_byte_action.hpp"
 #include "pmbus_write_vout_command_action.hpp"
 #include "rule.hpp"
 
@@ -215,6 +216,19 @@
     parseI2CWriteBit(const nlohmann::json& element);
 
 /**
+ * Parses a JSON element containing an i2c_write_byte action.
+ *
+ * Returns the corresponding C++ I2CWriteByteAction object.
+ *
+ * Throws an exception if parsing fails.
+ *
+ * @param element JSON element
+ * @return I2CWriteByteAction object
+ */
+std::unique_ptr<I2CWriteByteAction>
+    parseI2CWriteByte(const nlohmann::json& element);
+
+/**
  * Parses a JSON element containing an 8-bit signed integer.
  *
  * Returns the corresponding C++ int8_t value.