ICD-10-CM Code for Preauricular Swelling
The appropriate ICD-10-CM code for swelling in the preauricular area is R22.0 (Localized swelling, mass and lump, head).
Primary Code Selection
- R22.0 is the most direct code for localized swelling in the head region, which encompasses the preauricular area 1
- This code should be used when the swelling is the primary presenting symptom without a confirmed underlying diagnosis 1
Alternative Codes Based on Underlying Etiology
If the preauricular swelling has an identified cause, use the more specific diagnostic code instead:
Infectious/Inflammatory Causes
- H60.3 (Other infective otitis externa) - if the swelling is associated with otitis externa extending to the preauricular region 2
- L03.211 (Cellulitis of face) - if there is confirmed cellulitis involving the preauricular area 2
- L02.01 (Cutaneous abscess of face) - if an abscess is present in the preauricular region 2
Lymphadenopathy
- R59.0 (Localized enlarged lymph nodes) - specifically for preauricular lymph node enlargement 2, 3
- Preauricular lymphadenopathy is a common finding with conjunctivitis, otitis externa, and scalp infections 2
Specific Conditions
- H60.0 (Abscess of external ear) - if furunculosis or localized infection of the ear canal extends to cause preauricular swelling 2
- H70.0 (Acute mastoiditis) - if posterior auricular swelling is present with acute otitis media complications 2
Coding Pitfalls to Avoid
- Do not use unspecified codes when clinical examination can determine the specific location and nature of swelling 1, 4
- Verify the position of the ICD-10 code in the claim - principal diagnosis position has higher positive predictive value (>90%) compared to secondary positions 4, 5
- Document laterality when applicable (right vs. left preauricular area) as many ICD-10-CM codes require this specificity 1
Clinical Documentation Requirements
To support accurate coding, the medical record should specify: