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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. (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 chair's drive 
control) 
- An attendant control 
 
For power wheelchairs which are capable of being upgraded to an expandable controller (K0835, K0836, 
K0837, K0838, K0839, K0840, K0841, K0842, K0843, K0848, K0849, K0850, K0851, K0852, K0853, 
K0854, K0855, K0856 K0857, K0858, K0859, K0860, K0861 K0862, K0863, K0864, K0868, K0869, K0870, 
K0871, K0877, K0878, K0879, K0880, K0884, K0885, K0886, K0890, K0891), E2377 is used if an 
expandable controller is provided at the time of initial issue. Code E2376 is used with complete replacement of 
an expandable controller. 
 
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. However, if individual 
components of the harness are replaced, code K0108 should be used. 
 If an attendant control (E2331) is provided in addition to a beneficiary-operated drive control system, it will be 
denied as non-covered. (See the related LCD for situations in which it is provided in place of a beneficiary-
operated system.) 
 
An attendant control is one which allows a caregiver to drive the wheelchair instead of the beneficiary. The 
attendant control is usually mounted on one of the rear canes of the wheelchair. This code is limited to 
proportional control devices, usually a joystick. Code E2331 is used when an attendant control is provided in 
addition to a beneficiary-operated drive control interface. 
 
You can find this rule in the Local Coverage Article: Wheelchair Options/Accessories - Policy Article 
(A52504). 
 
The rules say that Medicare will pay for durable medical equipment that is needed for use in the home. Your 
home may be a dwelling, an apartment, a relatives home, a home for the aged, or some other type of 
institution. However, an institution may not be considered your home if it is an acute hospital or a skilled 
nursing facility (SNF). 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(D). 
 
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.