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The rules say that plans must pay for a medical service or item if regular Medicare would pay for it in this case. 
You can find this rule at 42 Code of Federal Regulations (CFR) Section 422.101. 
 
The rules say that Expandable Controller - An electronic system that is capable of accommodating one or more 
of the following additional functions: 
 
Proportional input devices (e.g., mini, compact, or short throw joysticks, touchpads, chin control, head control, 
etc.) other than a standard proportional joystick. 
Non-proportional input devices (e.g., sip and puff, head array, etc.) 
Operate 3 or more powered seating actuators through the drive control. (Note: Control of the power seating 
actuators though the Control Input Device would require the use of an additional component, E2310 or E2311.) 
An expandable controller may also be able to operate one or more of the following: 
A separate display (i.e., for alternate control devices) 
Other electronic devices (e.g., control of an augmentative speech device or computer through the chairs drive 
control) 
An attendant control 
 
Codes E2310 and E2311 describe electronic components that allow the patient to control two or more of the 
following motors from a single interface, e.g., proportional joystick, touchpad, or nonproportional interface: 
 
Power tilt 
Power recline, with or without shear reduction 
Combination power tilt and recline, with or without shear reduction 
Power leg elevation with or without articulation, power center mount elevating foot platform with or without 
articulating properties. 
 
You can find this information in Medicare's Local Coverage Article: Power Mobility Devices - Policy Article 
(A52498). 
 
The rules say that codes E2310 and E2311 describe the electronic components that allow the beneficiary to control two or more of the following motors from a single interface (e.g., proportional joystick, touchpad, or 
non-proportional interface): power wheelchair drive, power tilt, power recline, power shear reduction, power 
leg elevation, power seat elevation, power standing. It includes a function selection switch which allows the 
beneficiary to select the motor that is being controlled and an indicator feature to visually show which function 
has been selected. When the wheelchair drive function has been selected, the indicator feature may also show 
the direction that has been selected (forward, reverse, left, right). This indicator feature may be in a separate 
display box or may be integrated into the wheelchair interface. Payment for the code includes an allowance for 
fixed mounting hardware for the control box and for the display box (if present). 
 
A non-expandable controller has the following features: 
May have the ability to control up to 2 power seating actuators through the drive control (for example, seat 
elevator and single actuator power elevating legrests). (Note: Control of the power seating actuators though the 
Control Input Device would require the use of an additional component, E2310 or E2311.) 
Can accommodate only an integral joystick or a standard proportional remote joystick 
May allow for the incorporation of an attendant control 
An expandable controller is capable of accommodating one or more of the following additional functions: 
Other types of proportional input devices (e.g., mini-proportional or compact joysticks, touchpads, chin control, 
head control, etc.) 
Non-proportional input devices (e.g., sip and puff, head array, etc.) 
Operate 3 or more powered seating actuators through the drive control. (Note: Control of the power seating 
actuators though the Control Input Device would require the use of an additional component, E2310 or E2311.) 
You can find this information in the Local Coverage Article: Wheelchair Options/Accessories - Policy Article 
(A52504). 
 
If you want to read these Medicare rules, you can go to this website www.medicareappeal.com.