Blister of shoulder and upper arm, without mention of infection

This code signifies a localized collection of fluid under the epidermis, specifically located on the shoulder or upper arm. It indicates a non-infected blister, differentiating it from those with secondary bacterial involvement.

Apply this code when documentation clearly states a blister on the shoulder or upper arm without any signs or symptoms of infection (e.g., pus, significant erythema, fever). This is common for friction blisters, contact dermatitis, or minor burns where infection has been ruled out.

• Ensure documentation explicitly states "without infection" or provides no indication of infection.
• If infection is present, a more specific code from the 680-686 series (e.g., cellulitis, abscess) would be appropriate.
• Consider an external cause code (E-code) if the cause of the blister (e.g., friction, burn) is known and documented.