This document addresses therapeutic shoes, inserts and modifications to therapeutic shoes for individuals with diabetes. Therapeutic shoes may be custom-molded or depth shoes.

Medically Necessary:

Therapeutic shoes, inserts or modifications to therapeutic shoes are considered medically necessary if the following criteria are met:

1. The individual has diabetes mellitus; and
   
   
2. The individual has one or more of the following conditions:
   1. previous amputation of the other foot or part of either foot, or
   2. history of previous foot ulceration of either foot, or
   3. history of pre-ulcerative calluses of either foot, or
   4. peripheral neuropathy with evidence of callus formation of either foot, or
   5. foot deformity of either foot, or
   6. poor circulation in either foot.
      
      
3. The certifying physician who is managing the individual's systemic diabetes condition has certified that indications (1) and (2) above are met and that he/she is treating the individual under a comprehensive plan of care for his/her diabetes and that the individual needs therapeutic shoes, inserts or modifications to therapeutic shoes.

A custom-molded shoe is considered medically necessary when the individual has a foot deformity that cannot be accommodated by a depth shoe.

A modification of a custom-molded or depth shoe is considered medically necessary as a substitute for an insert. Although not intended as a comprehensive list, the following are the most common shoe modifications:

1. rigid rocker bottoms
2. roller bottoms
3. wedges
4. metatarsal bars
5. offset heels

Not Medically Necessary:

Any shoes, shoe inserts or modifications that do not meet the above criteria are considered not medically necessary.

The following codes for treatments and procedures applicable to this document are included below for informational purposes.  A draft of future ICD-10 Coding (effective 10/01/2014) related to this document, as it might look today, is included below for your reference.  Inclusion or exclusion of a procedure, diagnosis or device code(s) does not constitute or imply member coverage or provider reimbursement policy.  Please refer to the member's contract benefits in effect at the time of service to determine coverage or non-coverage of these services as it applies to an individual member.

Diabetes is a chronic illness in which the body does not properly produce or use insulin. Foot ulcerations, infection, peripheral neuropathy, and lower extremity amputations are some of the common consequences of diabetes. Effective management (including therapeutic shoes, inserts or modifications) of these factors may assist in the prevention of or delay of adverse outcomes. This clinical UM guideline is based on Medicare criteria.

Custom-molded shoe: A shoe that

• is constructed over a positive model of the individual's foot
• is made from leather or other suitable material of equal quality
• has removable inserts that can be altered or replaced as the individual's condition warrants
• has some form of shoe closure. 

Depth shoe: A shoe that

• has a full length, heel-to-toe filler that, when removed, provides a minimum of 3/16 inch of additional depth used to accommodate custom-molded or customized inserts
• is made from leather or other suitable material of equal quality
• has some form of shoe closure
• is available in full and half sizes with a minimum of three widths so that the sole is graded to the size and width of the upper portions of the shoe according to the American standard last sizing schedule or its equivalent.

The American standard last sizing schedule is the numerical shoe sizing system used for shoes in the United States.

Metatarsal bars: Exterior bars that are placed behind the metatarsal heads in order to remove pressure from the metatarsal heads. The bars are of various shapes, heights, and construction depending on the exact purpose.

Offset heel: A heel flanged at its base either in the middle, to the side, or a combination, that is then extended upward to the shoe in order to stabilize extreme positions of the hind foot.

Rigid rocker bottoms: Exterior elevations with apex position for 51% to 75% distance measured from the back end of the heel. The apex is a narrowed or pointed end of an anatomical structure. The apex must be positioned behind the metatarsal heads and taper off sharply to the front tip of the sole. Apex height helps to eliminate pressure at the metatarsal heads. Rigidity is ensured by the steel in the shoe. The heel of the shoe tapers off in the back in order to cause the heel to strike in the middle of the heel.

Roller bottoms (sole or bar): The same as rocker bottoms except the heel is tapered from the apex to the front tip of the sole.

Therapeutic shoe insert for diabetics described by HCPCS code A5512: Is a total contact, multiple density, prefabricated, removable inlay that is directly molded to the individual's foot or a model of the individual's foot and that is made of a suitable material with regard to the individual's condition. The material responsible for maintaining the shape of the device is called the base layer and must be heat moldable. This material usually constitutes the bottom layer of the device and must be of a sufficient thickness and durometer to maintain its shape during use (e.g., at least ¼ inch of Shore A 35 or higher, or 3/16 inch of Shore A 40 or higher). Modifications such as additional arch fill may be necessary to achieve and maintain total contact.

Therapeutic shoe insert for diabetics described by HCPCS code A5513; Is a total contact, custom fabricated, multiple density removable inlay that is molded to a model of the individual's foot or a model of the individual's foot so and that is made of a suitable material with regard to the individual's condition. A custom fabricated device is made from materials that do not have predefined trim lines for heel cup height, arch height and length or toe shape. The base layer of the device must be of a sufficient thickness and durometer to maintain its shape during use (e.g., at least 3/16 inch of Shore A 35 material or higher). The base layer is allowed to be thinner in the custom fabricated device because appropriate arch fill or other additional material will be layered up individually to maintain shape and achieve total contact. The central portion of the base layer of the heel may be thinner (but at least 1/16 inch) to allow for greater pressure reduction. The specified thickness of the lateral portions of the base layer must extend from the heel through the distal metatarsals and may be absent at the toes. The top layer of the device may be of a lower durometer and must also be heat moldable.

Wedges (posting): Are either for hind foot, fore foot, or both and may be in the middle or to the side. The function is to shift or transfer weight bearing upon standing or during ambulation to the opposite side for added support, stabilization, equalized weight distribution, or balance.

Government Agency, Medical Society, and Other Authoritative Publications:

1. American Diabetes Association. Standards of medical care in diabetes--2012. Diabetes Care. 2012; 35 Suppl 1:S11-63.
2. Medicare Benefit Policy Manual (IOM 100-02). Therapeutic Shoes for Individuals with Diabetes. Chapter 15, Section 140. Rev. 1, 10-01-03. Available at: http://www.cms.hhs.gov/manuals/Downloads/bp102c15.pdf. Accessed on December 17, 2012.                                                         
3. Spencer S. Pressure relieving interventions for preventing and treating diabetic foot ulcers. Cochrane Database Syst Rev. 2000; (3):CD002302.

1. American Diabetes Association. Available at: http://www.diabetes.org/. Accessed on December 17, 2012.

Custom-Molded Shoes
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