Unsp athscl native arteries of extremities, oth extremity

This code signifies a general hardening and narrowing of the native arteries in the extremities due to plaque buildup, without further specification of the exact location or type of atherosclerosis. It indicates a chronic, progressive disease affecting blood flow to the limbs. This diagnosis is used when the specific artery affected in an extremity other than the lower limbs (e.g., upper extremity) is not documented.

Apply this code when documentation confirms atherosclerosis of an unspecified native artery in an extremity other than the lower limbs, and no further anatomical detail is provided. This is appropriate for conditions like peripheral artery disease (PAD) affecting the upper extremities or other non-lower limb locations, where the specific vessel is not identified. Supporting documentation would include physician notes indicating "atherosclerosis of extremity," "PAD of upper limb," or similar, without specifying a particular artery.

• Only use this code when the specific artery (e.g., brachial, radial) is not documented. If a specific artery is mentioned, a more precise code from the I70.2- series should be used.
• This code is for "other extremity," meaning not the lower limbs. For unspecified atherosclerosis of lower extremity arteries, a different code is appropriate.
• Always review documentation for laterality (left, right, bilateral) and specific artery involvement to ensure the most precise code is selected.