Stir together cream cheese and mayonnaise in a large bowl until smooth. Stir in green chiles and jalapeno peppers. Pour mixture into a microwave safe serving dish, and sprinkle with Parmesan cheese.
Microwave on High until hot, about 3 minutes.
If you would like to brown the cheese, bake at 375 degrees F (190 degrees C) for about 30 minutes.
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