ICD-10 Diagnosis Code M12.421

• 553 - BONE DISEASES AND ARTHROPATHIES WITH MCC
• 554 - BONE DISEASES AND ARTHROPATHIES WITHOUT MCC

General Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

• 719.32 - Palindrom rheum-up/arm (approximate) Approximate Flag
  The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.

A joint is where two or more bones come together, like the knee, hip, elbow, or shoulder. Joints can be damaged by many types of injuries or diseases, including

• Arthritis - inflammation of a joint. It causes pain, stiffness, and swelling. Over time, the joint can become severely damaged.
• Bursitis - inflammation of a fluid-filled sac that cushions the joint
• Dislocations - injuries that force the ends of the bones out of position

Treatment of joint problems depends on the cause. If you have a sports injury, treatment often begins with the RICE (Rest, Ice, Compression, and Elevation) method to relieve pain, reduce swelling, and speed healing. Other possible treatments include pain relievers, keeping the injured area from moving, rehabilitation, and sometimes surgery. For arthritis, injuries, or other diseases, you may need joint replacement surgery to remove the damaged joint and put in a new one.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

• Hypermobile joints (Medical Encyclopedia)
• Joint pain (Medical Encyclopedia)
• Joint swelling (Medical Encyclopedia)
• Joint x-ray (Medical Encyclopedia)
• Limited range of motion (Medical Encyclopedia)
• Steroid injections - tendon, bursa, joint (Medical Encyclopedia)