M66.879 is a billable diagnosis code used to specify a medical diagnosis of spontaneous rupture of other tendons, unspecified ankle and foot. The code M66.879 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code M66.879 might also be used to specify conditions or terms like rupture of plantaris tendon or rupture of tendon of foot region.
Unspecified diagnosis codes like M66.879 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Rupture of plantaris tendon
- Rupture of tendon of foot region
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|557||TENDONITIS, MYOSITIS AND BURSITIS WITH MCC||08||1.3939|
|558||TENDONITIS, MYOSITIS AND BURSITIS WITHOUT MCC||08||0.8583|
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert M66.879 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code M66.879 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Ankle Injuries and Disorders
Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.
The most common ankle problems are sprains and fractures (broken bones). A sprain is an injury to the ligaments. It may take a few weeks to many months to heal completely. A fracture is a break in a bone. You can also injure other parts of the ankle such as tendons, which join muscles to bone, and cartilage, which cushions your joints. Ankle sprains and fractures are common sports injuries.
[Learn More in MedlinePlus]
Foot Injuries and Disorders
Each of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems:
- Bunions - hard, painful bumps on the big toe joint
- Corns and calluses - thickened skin from friction or pressure
- Plantar warts - warts on the soles of your feet
- Fallen arches - also called flat feet
Ill-fitting shoes often cause these problems. Aging and being overweight also increase your chances of having foot problems.
[Learn More in MedlinePlus]
Sprains and Strains
A sprain is a stretched or torn ligament. Ligaments are tissues that connect bones at a joint. Falling, twisting, or getting hit can all cause a sprain. Ankle and wrist sprains are common. Symptoms include pain, swelling, bruising, and being unable to move your joint. You might feel a pop or tear when the injury happens.
A strain is a stretched or torn muscle or tendon. Tendons are tissues that connect muscle to bone. Twisting or pulling these tissues can cause a strain. Strains can happen suddenly or develop over time. Back and hamstring muscle strains are common. Many people get strains playing sports. Symptoms include pain, muscle spasms, swelling, and trouble moving the muscle.
At first, treatment of both sprains and strains usually involves resting the injured area, icing it, wearing a bandage or device that compresses the area, and medicines. Later treatment might include exercise and physical therapy.
NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases
[Learn More in MedlinePlus]
|ICD Code||Description||Valid for Submission|
|M66||Spontaneous rupture of synovium and tendon||NON-BILLABLE CODE|
|M66.0||Rupture of popliteal cyst||BILLABLE CODE|
|M66.1||Rupture of synovium||NON-BILLABLE CODE|
|M66.10||Rupture of synovium, unspecified joint||BILLABLE CODE|
|M66.11||Rupture of synovium, shoulder||NON-BILLABLE CODE|
|M66.111||Rupture of synovium, right shoulder||BILLABLE CODE|
|M66.112||Rupture of synovium, left shoulder||BILLABLE CODE|
|M66.119||Rupture of synovium, unspecified shoulder||BILLABLE CODE|
|M66.12||Rupture of synovium, elbow||NON-BILLABLE CODE|
|M66.121||Rupture of synovium, right elbow||BILLABLE CODE|
|M66.122||Rupture of synovium, left elbow||BILLABLE CODE|
|M66.129||Rupture of synovium, unspecified elbow||BILLABLE CODE|
|M66.13||Rupture of synovium, wrist||NON-BILLABLE CODE|
|M66.131||Rupture of synovium, right wrist||BILLABLE CODE|
|M66.132||Rupture of synovium, left wrist||BILLABLE CODE|
|M66.139||Rupture of synovium, unspecified wrist||BILLABLE CODE|
|M66.14||Rupture of synovium, hand and fingers||NON-BILLABLE CODE|
|M66.141||Rupture of synovium, right hand||BILLABLE CODE|
|M66.142||Rupture of synovium, left hand||BILLABLE CODE|
|M66.143||Rupture of synovium, unspecified hand||BILLABLE CODE|
|M66.144||Rupture of synovium, right finger(s)||BILLABLE CODE|
|M66.145||Rupture of synovium, left finger(s)||BILLABLE CODE|
|M66.146||Rupture of synovium, unspecified finger(s)||BILLABLE CODE|
|M66.15||Rupture of synovium, hip||NON-BILLABLE CODE|
|M66.151||Rupture of synovium, right hip||BILLABLE CODE|
|M66.152||Rupture of synovium, left hip||BILLABLE CODE|
|M66.159||Rupture of synovium, unspecified hip||BILLABLE CODE|
|M66.17||Rupture of synovium, ankle, foot and toes||NON-BILLABLE CODE|
|M66.171||Rupture of synovium, right ankle||BILLABLE CODE|
|M66.172||Rupture of synovium, left ankle||BILLABLE CODE|
|M66.173||Rupture of synovium, unspecified ankle||BILLABLE CODE|
|M66.174||Rupture of synovium, right foot||BILLABLE CODE|
|M66.175||Rupture of synovium, left foot||BILLABLE CODE|
|M66.176||Rupture of synovium, unspecified foot||BILLABLE CODE|
|M66.177||Rupture of synovium, right toe(s)||BILLABLE CODE|
|M66.178||Rupture of synovium, left toe(s)||BILLABLE CODE|
|M66.179||Rupture of synovium, unspecified toe(s)||BILLABLE CODE|
|M66.18||Rupture of synovium, other site||BILLABLE CODE|
|M66.2||Spontaneous rupture of extensor tendons||NON-BILLABLE CODE|
|M66.20||Spontaneous rupture of extensor tendons, unspecified site||BILLABLE CODE|
|M66.21||Spontaneous rupture of extensor tendons, shoulder||NON-BILLABLE CODE|
|M66.211||Spontaneous rupture of extensor tendons, right shoulder||BILLABLE CODE|
|M66.212||Spontaneous rupture of extensor tendons, left shoulder||BILLABLE CODE|
|M66.219||Spontaneous rupture of extensor tendons, unspecified shoulder||BILLABLE CODE|
|M66.22||Spontaneous rupture of extensor tendons, upper arm||NON-BILLABLE CODE|
|M66.221||Spontaneous rupture of extensor tendons, right upper arm||BILLABLE CODE|
|M66.222||Spontaneous rupture of extensor tendons, left upper arm||BILLABLE CODE|
|M66.229||Spontaneous rupture of extensor tendons, unspecified upper arm||BILLABLE CODE|
|M66.23||Spontaneous rupture of extensor tendons, forearm||NON-BILLABLE CODE|
|M66.231||Spontaneous rupture of extensor tendons, right forearm||BILLABLE CODE|
|M66.232||Spontaneous rupture of extensor tendons, left forearm||BILLABLE CODE|