ICD-10 Code M05.312 – Rheumatoid heart disease with rheumatoid arthritis of left shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.312 – Rheumatoid heart disease with rheumatoid arthritis of left shoulder
What it is
This code identifies rheumatoid arthritis affecting the left shoulder in a patient who also has rheumatoid heart disease. Use it when the record links both conditions to the same rheumatoid disease process.
Clinical signs
Expect inflammatory joint findings in the left shoulder, such as pain, swelling, stiffness, and limited range of motion. Rheumatoid heart disease may be documented separately; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid heart disease and rheumatoid arthritis of the left shoulder together. It is appropriate when the left shoulder involvement is clearly specified and tied to rheumatoid arthritis, not another arthropathy. Check documentation if laterality or the cardiac association is unclear.
Do not use for
Do not use this code for rheumatoid arthritis of the shoulder without left-side documentation, or for isolated rheumatoid heart disease without shoulder involvement. Do not assign it if the shoulder condition is non-rheumatoid or the record does not confirm the linkage.
Coding tip
Verify both the laterality and the documented association with rheumatoid heart disease before assigning M05.312.