The registry will capture prospective data on patients receiving pain management for chronic pain due to knee osteoarthritis (OA) or pain optimization for knee arthroplasty due to knee OA. The OA pain therapies may include cryo nerve block, radiofrequency ablation (RFA), intra-articular (IA) corticosteroids, viscosupplementation, opioids, and others (e.g., non-steroidal anti-inflammatory drugs [NSAIDs]).

Inclusion Criteria:

1. Planned to receive treatment for knee OA pain including, but not limited to, knee injections, nerve blocking procedures, or knee arthroplasty within 60 days of screening
2. Able to understand the informed consent and assessment questionnaires and have the ability to complete them in the opinion of the investigator
3. Have access to a smartphone or internet access with a computer/tablet to complete the questionnaires using the registry application

Exclusion Criteria:

1. Actively enrolled in an investigational trial that would preclude patients from receiving the site's standard of care for knee OA pain or knee arthroplasty recovery protocol
2. Planning to have a surgery other than on the target knee

All patients who are planned to receive treatment within 60 days of screening for knee OA pain will be screened, and if eligible, will be approached for participation in the registry.