CPT 11420: How to Code And Bill Correctly

Getting medical coding right is important for getting paid on time and avoiding claim denials. 

CPT 11420 is a common code in dermatology and plastic surgery for removing small benign lesions. 

If it’s not coded correctly, you could lose money or deal with insurance issues. 

This guide explains CPT code 11420, when to use it, and how we at The Auctus Group can help with dermatology billing to make sure you get paid correctly.

What Is CPT 11420?

Let’s look at the basics of CPT 11420:

What It Covers

CPT 11420 is used when a doctor removes a benign lesion (including margins) from the scalp, neck, hands, feet, or genitalia when the lesion is 0.5 cm or smaller. 

This is done for medical or cosmetic reasons, such as irritation, infection risk, or patient preference.

When to Use This Code

Use CPT 11420 when:

• The lesion is benign (not cancerous)
• The doctor removes the lesion with margins to ensure complete removal
• The lesion size, including margins, is 0.5 cm or less
• The location is scalp, neck, hands, feet, or genitalia

When Not to Use This Code

Avoid using CPT 11420 when:

• The lesion is malignant (cancerous). Use a code from 11600-11646 instead
• The lesion is removed without margins. A shave removal code (11300-11313) might be more appropriate
• The procedure involves a skin graft or complex closure. Additional codes will be needed

How the Procedure Works

Let’s look how the procedure works:

Before the Procedure

• The doctor examines the lesion and determines if it should be removed
• The patient is informed of the risks and benefits
• Local anesthesia is used to numb the area

Step-by-Step Removal

1. The area is cleaned, and anesthesia is applied
2. The lesion and a small amount of surrounding tissue are cut out
3. The wound is closed with stitches if needed
4. The patient receives care instructions to help with healing

Aftercare

• Patients should keep the area clean and dry
• Stitches may need to be removed in 7-14 days, depending on the location
• Follow-up may be needed to check healing or lab results

Billing and Coding for CPT 11420

For insurance to pay for CPT 11420, documentation should include:

• The size and location of the lesion
• The reason for removal (medical necessity)
• Details of the procedure and closure method

Modifiers That May Be Needed

Using the right modifiers helps prevent claim denials:

• Modifier 22 – More work than usual was required
• Modifier 50 – The procedure was done on both sides of the body
• Modifier 51 – Multiple procedures were done at the same time
• Modifier 59 – The excision was separate from other procedures performed
• Modifier XS – The lesion was on a different structure (not the same area)
• Modifier LT/RT – Specifies which side of the body the lesion was on

Other Related Codes

Choosing the right CPT code depends on the size and location of the lesion:

• 11400 – Trunk, arms, or legs; lesion ≤0.5 cm
• 11401 – Lesion 0.6 – 1.0 cm
• 11402 – Lesion 1.1 – 2.0 cm
• 11403 – Lesion 2.1 – 3.0 cm
• 11404 – Lesion 3.1 – 4.0 cm
• 11406 – Lesion larger than 4.0 cm

Common Billing Mistakes and How to Avoid Them

Some of the common medical billing mistakes that can happen with cpt 11420 include:

• Wrong Lesion Size Reporting: Always document the size before excision, including the margins. Insurance companies check this when reviewing claims.
• Forgetting Important Modifiers: Leaving out Modifier 50 for bilateral procedures or Modifier 59 for separate excisions can cause claim rejections.
• Not Proving Medical Necessity: If a lesion is removed for cosmetic reasons, it may not be covered. Be sure to document symptoms like pain, bleeding, or infection risk to show medical necessity.

How We Can Help with Dermatology Billing And CPT 11420

At The Auctus Group, we help dermatology practices submit clean claims, reduce denials, and maximize reimbursements. 

We make sure your CPT 11420 claims are coded correctly so you get paid faster and don’t lose revenue to insurance mistakes.

Our Dermatology Billing Services Include:

• Medical Billing & Coding – We handle claim submissions and corrections
• Prior Authorizations – We get approvals faster, so your patients don’t have to wait
• Contracting & Credentialing – We help you get in-network with insurance providers
• Accounts Receivable Management – We track and follow up on unpaid claims
• Full Revenue Cycle Management – From claim submission to appeals, we take care of it all

We understand the complexities of dermatology billing and work with providers to ensure smooth claims processing and proper reimbursements.

Conclusion: CPT 11420

Getting CPT 11420 right is important for accurate billing and timely payments. 

By using the correct documentation, modifiers, and coding practices, you can avoid denials and ensure proper reimbursement.

If you need help with dermatology billing, The Auctus Group is here to take the stress out of the process. 

Contact us today to see how we can help your practice get paid faster and more accurately.

FAQs: CPT 11420

What is procedure code 11420?
Procedure code 11420 refers to the excision of a benign lesion, including margins, from the scalp, neck, hands, feet, or genitalia when the lesion size is 0.5 cm or smaller. This procedure is done for medical or cosmetic reasons and requires proper documentation to ensure reimbursement.

What is the CPT code for excision-benign scalp?
The CPT code for excising a benign lesion from the scalp depends on the lesion’s size. CPT 11420 applies if the lesion is 0.5 cm or smaller. For larger lesions, different codes apply, such as 11421 (0.6-1.0 cm), 11422 (1.1-2.0 cm), and so on.

What is the CPT code for excision of benign lesion of the foot?
For excision of a benign lesion on the foot, CPT 11420 is used when the lesion is 0.5 cm or smaller, including margins. If the lesion is larger, other codes like 11421, 11422, or 11423 may apply, depending on its size.

What is the difference between shave removal and shave biopsy?
A shave removal is when a lesion is shaved off the skin’s surface using a scalpel, often for cosmetic or medical reasons. A shave biopsy removes a thin layer of the lesion for laboratory testing to determine if it’s benign or malignant. A shave biopsy typically requires pathology analysis, while a shave removal does not.

Is cyst removal considered preventive care?
No, cyst removal is not typically considered preventive care. Preventive care includes screenings and services that help detect or prevent disease before symptoms appear. Cyst removal is usually considered a treatment for an existing condition, meaning it is billed as a medically necessary procedure rather than preventive care. Coverage and out-of-pocket costs depend on the patient’s insurance plan.