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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. 
 
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. 
 
You can find this information in the Local Coverage Article: Wheelchair Options/Accessories - Policy Article 
(A52504). 
 
The rules say that Medicare will pay for durable medical equipment that is mainly used to serve a medical 
purpose. Items such as hospital beds, respirators, wheelchairs and crutches are examples of equipment that are 
clearly used for medical purposes. Medicare will not pay for: 
 
1. Equipment that is primarily and customarily used for nonmedical purposes. Examples include air 
conditioners, humidifiers, dehumidifiers and electric air cleaners; 
2. Equipment used for a patients comfort or for the convenience of a person caring for the patient. Examples 
include elevators, stairway elevators, physical fitness equipment and self-help devices such as grab bars. You 
can find these rules in the Centers for Medicare and Medicaid Services, Internet Only Manual, Publication 100-
02, Medicare Benefit Policy Manual, Chapter 15, Section 110.1. 
 
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.