Localized swelling, mass and lump, unspecified lower limb

This code signifies the presence of a palpable, localized swelling, mass, or lump located anywhere on the lower limb, without further specification of its exact anatomical site or underlying etiology. It represents a non-specific finding that requires further investigation to determine the definitive diagnosis.

Use this code when documentation indicates a localized swelling or mass on the lower extremity, but the specific anatomical region (e.g., thigh, calf, ankle) is not documented, or the provider has not yet determined the precise nature of the lesion. This code is appropriate for initial encounters where a definitive diagnosis is pending.

• Avoid using this code if a more specific anatomical site (e.g., R22.41 for thigh) or a definitive diagnosis for the mass is known.
• Always query the provider for more specific documentation regarding the location and characteristics of the mass if possible.
• This code should generally be followed by codes for further diagnostic workup or a more specific diagnosis once determined.