The Maytag refrigerator model MBF2256KEW does not come with a built-in ice maker filter. This model is part of the Maytag Bottom Freezer Refrigerator series and features a factory-installed ice maker that is not equipped with an internal water filter. However, it's important to note that some Maytag refrigerators, especially newer models, may offer optional or add-on water filters that can be installed in the water supply line leading to the ice maker and water dispenser. These filters are designed to improve the quality of the water by reducing contaminants, such as chlorine taste and odor, sediment, and certain impurities. If you are interested in filtering the water that goes to your Maytag MBF2256KEW refrigerator's ice maker and water dispenser, you can explore external water filter options. External water filters are commonly available in various styles, and they can be installed easily in the water supply line. These filters are typically compatible with most refrigerator models that have a water dispenser or ice maker. Before purchasing an external water filter, ensure that it is compatible with your specific refrigerator model. Refer to the refrigerator's user manual or check the manufacturer's website for recommended filter models and installation instructions. As manufacturers may update their product offerings, it's always best to verify the most current information regarding water filter compatibility and availability by visiting Maytag's official website or contacting their customer support. They can provide you with the latest details and suitable options for filtering water in your specific Maytag refrigerator model.