ICD-10 Code M05.829 – Other rheumatoid arthritis with rheumatoid factor of unspecified elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.829 – Other rheumatoid arthritis with rheumatoid factor of unspecified elbow
What it is
This code identifies rheumatoid arthritis involving an unspecified elbow, with rheumatoid factor present, but not fitting a more specific rheumatoid arthritis subtype. Use it when the record documents RA and elbow involvement without laterality.
Clinical signs
Typical findings include chronic inflammatory joint pain, swelling, stiffness, and reduced range of motion in the elbow. Clinical features vary; refer to documentation for the specific rheumatoid arthritis subtype.
When to use this code
Use M05.829 when the provider documents rheumatoid arthritis with rheumatoid factor affecting the elbow and does not specify right or left. It also fits when the chart supports RA but the elbow laterality is missing or not stated.
Assign this code from the diagnosis statement, imaging interpretation, or specialist note only if the elbow involvement is clear. If the record names a more specific rheumatoid arthritis code, use that instead.
Do not use for
Do not use this code for rheumatoid arthritis without rheumatoid factor, or for arthritis limited to another joint. Check documentation if the elbow is not specified or if laterality is documented elsewhere.
Coding tip
Confirm both rheumatoid factor positivity and unspecified elbow involvement before coding, and avoid guessing laterality from context.