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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 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. 
 
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 chair's drive 
control) 
- An attendant control 
 
A harness (E2313) describes all of the wires, fuse boxes, fuses, circuits, switches, etc. that are required for the 
operation of an expandable controller. It also includes all the necessary fasteners, connectors, and mounting 
hardware. Code E2313 is separately billable in addition to an expandable controller both at initial issue and 
with complete replacement of the expandable controller. Code K0108 must not be used for any component or 
feature of an expandable controller at the time of initial issue. The reimbursement for any type of complete 
expandable controller is included in the allowance for codes E2377/E2376 plus E2313. 
 
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. 
 
A compact proportional remote joystick (E2373) is one which has a maximum excursion of about 15 mm from 
neutral position but requires approximately 340 grams of force to activate. It can only be used with an 
expandable controller. It can be used for hand or chin control or control by other body part (e.g., foot, amputee 
stump, etc.). There is no separate billing for control buttons, displays, switches, etc. There is no separate billing 
for fixed mounting hardware, regardless of the body part used to activate the joystick. 
 
A power seat elevation feature (E2300) and power standing feature (E2301) are non-covered because they are 
not primarily medical in nature. 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. 
 
The Plan contract says that the Plan covers items and services in accordance with Medicare rules.