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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 Non-Expandable Controller - An electronic system that controls the speed and direction of the 
power wheelchair drive mechanism. Only a standard proportional joystick (used for hand or chin control) can 
be used as the input device. This system may be in the form of an integral controller or a remotely placed 
controller. The non-expandable controller: 
 
a. 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.) 
b. May allow for the incorporation of an attendant control. 
 
Expandable Controller - An electronic system that is capable of accommodating one or more of the following 
additional functions: 
 
a. Proportional input devices (e.g., mini, compact, or short throw joysticks, touchpads, chin control, head 
control, etc.) other than a standard proportional joystick. 
b. Non-proportional input devices (e.g., sip and puff, head array, etc.) 
c. 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: 
 
d. A separate display (i.e., for alternate control devices) 
e. Other electronic devices (e.g., control of an augmentative speech device or computer through the chairs 
drive control) 
f. An attendant control 
 
You can find this information in Medicare's Local Coverage Article: Power Mobility Devices - Policy Article 
(A52498).  
The rules say that a power leg elevation feature (E1010, E1012) involves dedicated motor(s) and related 
electronics with or without variable speed programmability which allows the legrest to be raised and lowered 
independently of the recline and/or tilt of the seating system. It includes a switch control which may or may not 
be integrated with the power tilt and/or recline control(s). It includes either articulating or non-articulating 
legrests. The unit of service of code E1010 is a pair. The unit of service for code E1012 is each. 
 
A power tilt and recline seating system (E1006, E1007, E1008) includes: a solid seat platform and a solid back; 
any frame width and depth; detachable or flip-up fixed height or adjustable height armrests; fixed or 
swingaway detachable legrests; fixed or flip-up footplates; two motors and related electronics with or without 
variable speed programmability; a switch control which is independent of the power wheelchair drive control 
interface; any hardware that is needed to attach the seating system to the wheelchair base. It does not include a 
headrest. It must have the following features: ability to tilt to greater than or equal to 20 degrees from 
horizontal; ability to recline to greater than or equal to 150 degrees from horizontal; back height of at least 20 
inches; ability to support beneficiary weight of at least 250 pounds. 
 
Miscellaneous options, accessories, or replacement parts for wheelchairs that do not have a specific HCPCS 
code are not included in another code should be coded K0108. You can find this information in Medicare's 
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.