M06.212 Rheumatoid bursitis, left shoulder

Name of the Condition

• Rheumatoid bursitis, left shoulder

Summary

Rheumatoid bursitis of the left shoulder is inflammation of the bursae (fluid-filled sacs that cushion joints) in the left shoulder region, driven by rheumatoid arthritis (RA). This condition results from the immune system’s chronic inflammatory processes affecting the shoulder’s protective structures, leading to pain, swelling, and restricted mobility. Diagnosis requires correlation of clinical findings with RA history or serologic evidence.

Causes

Rheumatoid bursitis in the left shoulder arises from the systemic inflammation of rheumatoid arthritis. The immune system’s attack on joint tissues extends to the shoulder’s bursae, causing fluid accumulation and irritation. While RA is the primary driver, mechanical stress or trauma to the left shoulder may exacerbate inflammation in susceptible individuals.

Risk Factors

• Preexisting rheumatoid arthritis, increasing bursal inflammation risk.
• Advanced age, as RA severity often progresses over time.
• Prolonged shoulder overuse or pressure, which may irritate bursae.
• Systemic inflammation, as seen in active RA flares.

Symptoms

• Localized swelling and tenderness over the left shoulder bursae.
• Pain with shoulder movement or pressure on the inflamed area.
• Reduced range of motion in the left shoulder joint.
• Warmth or redness (if inflammation is acute).

Diagnosis

Diagnosis of rheumatoid bursitis of the left shoulder involves a clinical evaluation, including a history of RA and physical examination of the left shoulder. Imaging (e.g., ultrasound or MRI) may confirm bursal inflammation, while serologic tests (e.g., rheumatoid factor, anti-CCP antibodies) support the underlying RA diagnosis. Aspiration of bursal fluid may be performed to rule out infection or crystal-induced arthritis.

Treatment Options

Treatment focuses on reducing inflammation and managing RA. Nonsteroidal anti-inflammatory drugs (NSAIDs) or corticosteroid injections into the left shoulder bursa may alleviate pain and swelling. Disease-modifying antirheumatic drugs (DMARDs) or biologics target systemic RA inflammation. Physical therapy helps restore mobility and strength. In severe cases, surgical intervention (e.g., bursectomy) may be considered.

Prognosis and Follow-Up

Prognosis depends on RA control and adherence to treatment. With proper management, symptoms often improve, but chronic inflammation may lead to persistent discomfort or functional limitations. Regular follow-up with a rheumatologist and orthopedic specialist is recommended to monitor RA activity and adjust therapy as needed.

Complications

Untreated or poorly controlled inflammation may result in chronic pain, limited shoulder function, or bursal thickening. Rarely, infection of the bursa (septic bursitis) can occur, requiring prompt antibiotic treatment.

Lifestyle & Prevention

Maintaining RA control through medication and lifestyle measures (e.g., balanced diet, stress reduction) may reduce flare-ups. Avoiding repetitive overhead movements or excessive pressure on the left shoulder can minimize bursal irritation. Gentle exercises to preserve shoulder mobility are advised.

When to Seek Professional Help

Seek care if left shoulder pain worsens, swelling persists, or mobility significantly decreases. Prompt evaluation is needed if signs of infection (e.g., fever, redness, pus) appear, as these require urgent treatment.

Tips for Medical Coders

Document the left shoulder involvement and correlation with rheumatoid arthritis to support the M06.212 code. Include clinical details (e.g., physical exam findings, imaging results) and RA history to confirm the diagnosis. Ensure specificity of the shoulder site and exclude other bursal conditions (e.g., septic or traumatic bursitis) for accurate coding.