Impingement syndrome of left shoulder

This code signifies the compression of the rotator cuff tendons and/or bursa in the subacromial space of the left shoulder. This impingement typically occurs during arm elevation, leading to pain, weakness, and limited range of motion. It is often a result of repetitive overhead activities or anatomical variations.

Use this code when documentation explicitly states "impingement syndrome of the left shoulder" or similar terminology indicating subacromial impingement affecting the left side. This diagnosis is commonly supported by physical examination findings (e.g., positive Neer's or Hawkins-Kennedy tests) and imaging studies (e.g., MRI showing rotator cuff tendinopathy or bursitis).

• Ensure laterality is clearly documented as "left shoulder" to support this specific code.
• Distinguish from rotator cuff tears (S46.02-) or other shoulder pathologies, which have separate codes.
• Look for documentation of the specific type of impingement (e.g., primary, secondary, internal) if available, though it may not alter the primary diagnosis code.