CPT Code 11424: Benign lesion excision billing and fee schedule

Key Takeaways

CPT Code 11424 describes excision of a benign lesion (including margins) on the scalp, neck, hands, feet, or genitalia, with an excised diameter of 3.1 to 4.0 cm.

The excised diameter includes the narrowest margin – not the lesion alone – and must be measured and documented in the operative note.

Incorrect size measurement is the leading cause of upcoding or downcoding claims; a 0.1 cm difference can shift the code to 11423 or 11426.

Pabau’s claims management software links diagnosis codes to procedure codes at the point of documentation, reducing modifier errors and supporting cleaner first-pass submissions.

CPT Code 11424 covers excision of a benign lesion, including margins, on the scalp, neck, hands, feet, or genitalia, when the excised diameter measures 3.1 to 4.0 cm.

The measurement includes the narrowest margin taken alongside the lesion itself, so a single millimeter of difference can shift a claim into the wrong size tier.

For dermatology and surgical practices billing dozens of lesion removals each week, consistent measurement matters at volume. As a result, the dermatology EMR software a practice uses directly affects how reliably those measurements flow from the operative note into the claim.

This reference covers CPT Code 11424 – the official descriptor, how excised diameter is measured, applicable modifiers, the 2026 Medicare fee schedule with RVU breakdown, qualifying ICD-10 diagnosis codes, documentation requirements, and the most common billing errors to avoid.

CPT Code 11424: Definition and clinical description

Official descriptor: Excision, benign lesion including margins, except skin tag (unless listed elsewhere), scalp, neck, hands, feet, genitalia; excised diameter 3.1 to 4.0 cm. CPT Code 11424 falls within the Excision-Benign Lesions category of the Surgery section of the AMA CPT code set, which the American Medical Association maintains annually.

What qualifies as a benign lesion? Common examples include nevi (moles), cysts, lipomas, sebaceous cysts, and other growths confirmed or expected to be non-malignant. However, the code does not apply to malignant lesions – those route to the 116xx code series instead (e.g. CPT 11624 for the same anatomical sites).

The measurement rule that matters most: Under AMA CPT guidelines, excised diameter is the widest dimension of the excised specimen, including the narrowest margin of normal tissue removed – not the visible lesion size alone.

For example, a lesion measuring 2.8 cm that requires a 0.2 cm margin on each side gives an excised diameter of 3.2 cm, correctly placing it under CPT Code 11424 rather than 11423. So documenting this calculation clearly in the operative note is what protects the claim.

Modifiers applicable to CPT Code 11424

Modifier selection affects both payment and audit risk. The table below covers the modifiers most commonly applied to CPT Code 11424, with the specific billing scenario each one addresses.

Modifier 59 is verified by the AAPC coding guidelines as applicable when NCCI edits would otherwise bundle a second same-day procedure with 11424. Therefore, always check the National Correct Coding Initiative (NCCI) edit table before appending modifier 59 to confirm a conflict pair actually exists.

CPT Code 11424 fee schedule and reimbursement (2026)

Reimbursement for CPT Code 11424 varies by payer, location, and place of service. The figures below reflect the 2026 Medicare Physician Fee Schedule national rates. Verify current rates via the CMS fee schedule lookup, which is updated annually each January.

RVU breakdown

The relative value unit (RVU) structure for CPT Code 11424 determines the Medicare payment amount. Work RVU reflects physician effort; practice expense RVU covers overhead; malpractice RVU covers liability costs. The FastRVU 2026 lookup tool provides current values by locality.

Facility vs non-facility rates

The place of service determines which RVU set applies. Non-facility rates (office setting, place of service 11) are higher because the practice absorbs overhead costs. By contrast, facility rates (hospital outpatient or ASC, place of service 22 or 24) are lower because the facility separately bills for supplies and overhead.

The reimbursed dollar amount is the total RVU multiplied by the annual Medicare conversion factor ($33.4009 in 2026).

Rates above are approximate estimates based on reported RVU values and the 2026 conversion factor of $33.4009, and should be verified against the CMS Physician Fee Schedule before billing. In addition, private payer contracts may pay above or below Medicare rates depending on location and contract terms.

ICD-10 codes that support medical necessity

Pairing CPT Code 11424 with the correct ICD-10-CM diagnosis code is how practices establish medical necessity to the payer. Symptomatic lesions – those causing pain, bleeding, or functional limitation – are more reliably covered than asymptomatic cosmetic removals. Payer Local Coverage Determinations (LCDs) vary, so check your MAC’s LCD before assuming coverage for a specific diagnosis.

The same precision applies to every diagnosis code, whether it is ICD-10 Code I32 on a cardiology claim or a lesion diagnosis here – one wrong digit flips a covered claim into a denial. The commonly paired codes below cover the most frequent benign lesion diagnoses billed alongside CPT 11424.

Always use the most specific code available. For instance, D23.4 (benign neoplasm of skin, scalp and neck) is more precise – and more defensible – than D23.9 (unspecified site) when billing an excision from the scalp.

The same specificity principle carries across specialties, from ICD-10 Code P53 to routine lesion diagnoses, and tracking coverage policies across claim batches is where skin clinic software with built-in billing analytics earns its value.

Documentation requirements

Incomplete documentation is the second most common reason CPT Code 11424 claims are denied, after size-tier errors. Every element below must appear in the medical record before the claim is submitted.

• Excised diameter with margin calculation: Document the lesion dimension, the margin taken, and the resulting excised diameter. “Lesion 2.8 cm; 0.2 cm margin excised on each side; total excised diameter 3.2 cm” is compliant. “Large lesion removed” is not.
• Anatomical site: Specify the exact location (e.g., posterior scalp, dorsum of right hand). The site must match the 1142x series’ covered anatomical locations.
• Clinical diagnosis: State the suspected or confirmed diagnosis, and note whether the lesion was symptomatic (bleeding, pain, obstruction).
• Pathology submission: Most payers require the specimen to be sent for pathology. Document that the specimen was submitted and note the pathology report number in the chart.
• Pre-authorization: Some commercial payers require prior authorization for benign lesion excision depending on plan design. Verify payer-specific requirements before scheduling.
• Modifier justification: If modifier 59 or 25 is appended, the corresponding distinct procedure or separate E/M must be documented as a separate entry in the record.

Using digital intake forms that prompt for each of these fields at the point of care catches missing documentation before claims are submitted. Structured templates also support HIPAA-compliant documentation practices by ensuring the right data is captured – and retained – consistently.

Good documentation practices carry across specialties too – our guide to coaching CPT codes covers the same principle for a different billing context.

Related CPT codes in the 1142x series

CPT Code 11424 is one of six codes in the 1142x benign lesion excision series, all covering the same anatomical sites (scalp, neck, hands, feet, genitalia) but separated by excised diameter. Selecting the right code requires measuring the specimen accurately, because size-tier errors create both underpayment and overpayment audit risk.

11424 vs. 11423 vs. 11402: Choosing the right code

Three codes generate the most coder confusion for mid-size benign lesion removals: 11423, 11424, and 11402. The anatomical site and excised diameter together determine the correct selection.

The most common error here is billing 11424 for a lesion on the forearm (which falls under the 1140x series) because the coder focused on size without verifying the anatomical site. See our reference on the ADHD screening CPT code for a broader look at how site-of-service rules affect code selection across categories.

Global period and post-operative billing

CPT Code 11424 carries a 10-day global surgical period under CMS guidelines, which determines which post-operative services can and cannot be billed separately.

What is bundled into the global period? During the 10-day post-operative window, the following services are considered part of the surgical package and cannot be billed separately:

• Routine post-operative visits related to the excision
• Suture removal (when performed by the same surgeon)
• Dressing changes directly related to the excision wound
• Treatment of complications that do not require a return to the operating room

What can still be billed during the global period? Services that are unrelated to the excision are billable. However, they must carry modifier 24 (unrelated E/M during post-op period) or modifier 79 (unrelated procedure during post-op period) to prevent denial. Pathology review of the excised specimen is also separately billable, as it falls outside the surgical global package.

Practices that track global period windows in their claims management software can flag patients in the post-operative window automatically, prompting the billing team to verify modifier requirements before submission.

Common billing errors and denial prevention

Claim denials for benign lesion excisions follow predictable patterns. The table below maps the most frequent error types, their root causes, and how to prevent them before submission.

Repair code bundling is especially tricky for CPT Code 11424. Simple, intermediate, and complex closure rules differ: a simple closure is always included in the excision fee, while a complex repair (e.g., flap closure) may be separately reportable. So when in doubt, review the NCCI edits for the specific repair code pair before submitting.

Reduce denials on benign lesion excision claims

Pabau connects clinical documentation to claim submission in one workflow, automatically flagging missing modifiers and linking diagnosis codes to procedures before claims go out the door.

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How Pabau supports benign lesion excision billing?

Billing CPT Code 11424 cleanly requires three things to line up:

• An accurate excised diameter in the operative note
• The correct ICD-10 code paired to it
• The right modifier on the claim

When those three steps happen across separate systems, the connection between them breaks down and errors reach the claim.

Pabau’s medical records management connects the clinical note, diagnosis code assignment, and claim line in one workflow. Procedure templates can be built to prompt for excised diameter and margin documentation at the point of care, so the measurement is captured before the encounter closes.

For practices managing dermatology and skin clinic caseloads at scale, that structured capture is what keeps the 1142x size tiers accurate across hundreds of claims. Explore how practice management software brings these workflows together for outpatient surgical practices.

For broader procedural billing across specialties, see our reference on IVF CPT codes, which shows how documentation requirements differ by specialty type.

Conclusion

Measurement accuracy drives everything for CPT Code 11424. A lesion excision that crosses the 3.0 cm threshold belongs here, not in 11423, and the operative note must show the math. In short, pair it with the most specific ICD-10-CM code available, track the 10-day global period, and audit modifier usage before submission.

Pabau’s built-in documentation templates and claims workflow link operative note data directly to claims, reducing the size-tier errors and missing modifiers that generate the bulk of denials on benign lesion excision claims. To see how Pabau handles this in practice, book a demo.

Continue your research

Need another example of anatomical specificity driving reimbursement? CPT Code 11006 covers debridement billing for necrotizing soft tissue infection, where site and extent determine the correct code the same way excised diameter does here.

Want to see how diagnosis specificity changes claim outcomes? ICD-10 Code Q38.5 shows how a single fourth-character difference changes coverage for a congenital diagnosis.

Looking for a structured documentation template? Our medical review of systems template outlines the fields payers expect to see before approving a claim.

Frequently Asked Questions

Documentation, closures, and global period