diff --git a/docs/reference/execution-providers/NNAPI-ExecutionProvider.md b/docs/reference/execution-providers/NNAPI-ExecutionProvider.md
index 2c0a21e7c7..bf89303efe 100644
--- a/docs/reference/execution-providers/NNAPI-ExecutionProvider.md
+++ b/docs/reference/execution-providers/NNAPI-ExecutionProvider.md
@@ -30,8 +30,43 @@ For build instructions, please see the [BUILD page](../../how-to/build.md#Androi
 ```c++
 Ort::Env env = Ort::Env{ORT_LOGGING_LEVEL_ERROR, "Default"};
 Ort::SessionOptions sf;
-Ort::ThrowOnError(OrtSessionOptionsAppendExecutionProvider_Nnapi(sf));
+uint32_t nnapi_flags = 0;
+Ort::ThrowOnError(OrtSessionOptionsAppendExecutionProvider_Nnapi(sf, nnapi_flags));
 Ort::Session session(env, model_path, sf);
 ```
 
 The C API details are [here](../api/c-api.md).
+
+## Configuring NNAPI Execution Provider run time options
+
+There are several run time options for NNAPI Execution Provider.
+
+* NNAPI_FLAG_USE_FP16
+
+   Using fp16 relaxation in NNAPI EP, this may improve perf but may also reduce precision.
+
+* NNAPI_FLAG_USE_NCHW
+
+   Use NCHW layout in NNAPI EP, this is only available after Android API level 29. Please note for now, NNAPI might perform worse using NCHW compare to using NHWC.
+
+* NNAPI_FLAG_CPU_DISABLED
+
+   Prevent NNAPI from using CPU devices.
+
+   NNAPI is more efficient using GPU or NPU for execution, and NNAPI might fall back to its own CPU implementation for operations not supported by GPU/NPU. The CPU implementation of NNAPI (which is called nnapi-reference) might be less efficient than the optimized versions of the operation of ORT. It might be advantageous to disable the NNAPI CPU fallback and handle execution using ORT kernels.
+
+   For some models, if NNAPI would use CPU to execute an operation, and this flag is set, the execution of the model may fall back to ORT kernels.
+
+   This option is only available after Android API level 29, and will be ignored for Android API level 28 and lower.
+
+   For NNAPI device assignments, see https://developer.android.com/ndk/guides/neuralnetworks#device-assignment
+
+   For NNAPI CPU fallback, see https://developer.android.com/ndk/guides/neuralnetworks#cpu-fallback
+
+
+To use NNAPI execution provider run time options, create an unsigned integer representing the options, and set each individual options by using the bitwise OR operator,
+
+```
+uint32_t nnapi_flags = 0;
+nnapi_flags |= NNAPI_FLAG_USE_FP16;
+```
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