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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 when submitting a prosthetic claim, the billed code for knee, foot, ankle and hip (HCPCS 
codes L5610, L5611, L5613, L5614, L5616, L5710, L5711, L5712, L5714, L5716, L5718, L5722, L5724, 
L5726, L5728, L5780, L5810, L5811, L5812, L5814, L5816, L5818, L5822, L5824, L5826, L5828, L5830, 
L5840, L5848, L5856, L5857, L5858, L5859, L5930, L5961, L5970, L5971, L5972, L5973, L5974, L5975, 
L5976, L5978, L5979, L5980, L5981, L5982, L5984, L5985, L5986, L5987) components must be submitted 
with modifiers K0 - K4, indicating the expected beneficiary functional level. This expectation of functional 
ability information must be clearly documented and retained in the prosthetist's records. The simple entry of a 
K modifier in those records is not sufficient. There must be information about the beneficiarys history and 
current condition which supports the designation of the functional level by the prosthetist. 
 
Addition codes for endoskeletal knee-shin systems are L5610, L5611, L5613, L5616, L5810, L5811, L5812, 
L5814, L5816, L5818, L5822, L5824, L5826, L5828, L5830, L5840 are considered an upgrade to the knee-
shin system. The beneficiary may qualify for an upgraded knee-shin system based on their assigned K-Level 
modifier (K0-K4), as referenced in the LCD. These HCPCS codes can fully describe a complete prosthetic 
knee-shin system commonly referred to as a base knee code. A single addition code can fully describe a 
complete knee-shin system and thus the use of two codes (L5610, L5611, L5613, L5616, L5810, L5811, 
L5812, L5814, L5816, L5818, L5822, L5824, L5826, L5828, L5830, L5840) would be considered incorrect 
coding (unbundling). 
 
L5925, L5930, L5845, L5848, L5850, L5856, L5857, L5858, L5859 are additional features and/or functions 
that do not describe a complete endoskeletal knee-shin system and must be used in combination with an L-code 
for a knee-shin system (L5610, L5611, L5613, L5616, L5810, L5811, L5812, L5814, L5816, L5818, L5822, 
L5824, L5826, L5828, L5830, L5840). The use of additional feature L-codes may also depend on the assigned 
K-Level modifier (K0-K4), as referenced in the LCD. 
 
L5925, L5930, L5845, L5848, L5850, L5856, L5857, L5858, L5859 are additional features and/or functions 
that do not describe a complete endoskeletal knee-shin system and must be used in combination with an L-code 
for a knee-shin system (L5610, L5611, L5613, L5616, L5810, L5811, L5812, L5814, L5816, L5818, L5822, 
L5824, L5826, L5828, L5830, L5840). The use of additional feature L-codes may also depend on the assigned 
K-Level modifier (K0-K4), as referenced in the LCD. 
 
L5856 refers to a feature of an endoskeletal knee component which is incorporated into the entire knee-shin 
system. The microprocessor componentry with sensors, any type, provide automated adjustment for controlling 
the swing and stance phase of gait. This feature would be discernable from schematic drawings and user 
manual documentation. The documentation would provide details for all of the adjustments for the dynamic 
properties of this sub-system within the knee component. Adjustments could factor user characteristics such as 
the activity level, body weight, or gait preferences, among others. This adjustment feature is energized by an 
on-board rechargeable battery source. The code would include any external components needed to access the 
microprocessor for modification of the settings. 
 
Codes L5968, L5982, L5984, L5985, L5986 and L5988 describe separate products which provide either a 
single motion or a combination of motions generally attributed to functional movement of the lower limb 
during ambulation. The use of these codes can be used to fully describe additional features or functions not 
found in the prosthetic foot system (L5969, L5970, L5971, L5972, L5973, L5974, L5975, L5976, L5978, 
L5979 L5980, L5981 and L5987). 
 
L5986 describes a product that is used as an addition to L-code foot systems for lower limb prosthesis construction. The product provides multiaxial motion in all three planes of motion, sagittal, coronal, and 
transverse. This code does not describe the multiaxial motion achieved from the inherent flexibility of the 
prosthetic keel or a split keel/heel prosthetic foot design. The predicate product is a device that was 
manufactured by Medical Center Prosthetic, which is represented in the coding narrative by MCP. 
 
Use of L5968, L5982, L5984 or L5986 is based on the beneficiarys K-level modifier (K0-K4), as referenced 
in the LCD. L5968, L5982, L5984, L5985, L5986, L5988, L5990 are additional features and/or functions that 
do not describe a complete prosthetic foot and may be used in combination with L5970, L5971, L5972, L5974, 
L5975, L5976, L5978, L5979, L5980, L5981, and L5987. The use of additional feature L-codes may also 
depend on the assigned K-Level modifier (K0-K4) as referenced in the LCD. 
 
Payment by Medicare Part A for a prosthesis provided to a beneficiary, described by codes L5000, L5010, 
L5020, L5400, L5410, L5420, L5430, L5450, L5460, L5987, L8400, L8410, L8417, L8420, L8430, L8440, 
L8460, L8470, and L8480, for use during a Medicare Part A covered SNF stay is eligible for inclusion in the 
payment for the SNF stay if the following criteria (1 and 2) are met: 
 
The prosthesis is provided to a beneficiary during the SNF stay; and, 
 
The beneficiary uses the prosthesis for reasonable and necessary treatment or rehabilitation. 
 
In this situation, a claim must not be submitted to the DME MAC. 
 
Addition codes for lower extremity prostheses, L5970, L5971, L5972, L5974, L5975, L5976, L5978, L5979, 
L5980, L5981, L5987 are considered an upgrade to the SACH foot. The beneficiary may qualify for an 
upgraded prosthetic foot based on their assigned K-level modifier (K0-K4) as referenced in the LCD. A single 
addition code (L5970, L5971, L5972, L5974, L5975, L5976, L5978, L5979, L5980, L5981, L5987) can fully 
describe a complete foot and thus the use of more than one code would be considered incorrect coding 
(unbundling). 
 
L5987 describes a product that can be used for either endoskeletal or exoskeletal lower limb construction. All 
components are integrated as a single product, i.e., not an assembly of separate products or components. The 
product has an energy storing J-shaped keel design. Heel component is attached onto the J-shaped keel section. 
Vertical loading pylon allows controlled motion for shock absorption. This code does not describe vertical 
loading or shock absorption achieved from the inherent flexibility of the J-shaped keel section. L5987 includes 
foot cover. You can find these rules in the Local Coverage Article Lower Limb Prostheses - Policy Article 
A52496. 
 
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.