Nail Avulsion CPT Codes 11730, 11732, and 11750

Billing 11730 and 11750 together on the same digit is one of the most common nail avulsion coding errors in podiatry. Both codes describe work on the same nail on the same date. Under NCCI edits, they are bundled. The claim is denied and the reimbursement is lost entirely.

This guide will provide you with all the information on what nail avulsion CPT codes cover, when to apply them, and the billing issues that could affect the reimbursement.

What Each Nail Avulsion CPT Code Covers

The difference between these codes is not about how much nail was removed. It is about whether the matrix was treated and whether the removal was permanent.

CPT 11730: Avulsion of Nail Plate, Single

CPT 11730 covers partial or complete removal of a single nail plate. The physician administers a digital block, separates the nail plate from the nail bed using a nail elevator or iris scissors, and dresses the digit. The matrix is left intact. The nail will grow back.

This code represents all services performed on that nail for the date of service. If both the medial and lateral borders are involved, you still bill one unit. You do not bill a separate nail avulsion CPT code for each border treated.

CPT code 11730 has a 10-day window globally. Medical coders bundle the code if there’s any post-operative follow-up visit in the said window. Do not bill a separate evaluation and management code for routine wound checks during that period. Modifier 24 is yet another option to use if the visit concerns any new or unrelated condition. 

CPT 11732: Each Additional Nail Plate

The amount of extra nail plates that were avulsed on the same day of service is accounted for by the add-on code CPT 11732. Only after you have invoiced CPT 11730 may you bill CPT 11732 as an add-on code.

Since there are no NCCI edit codes between 11730 and 11732, coding the two doesn’t require a modifier.

You will use 11730 but not 11732 if the patient comes for another nail appointment and the consultation is extended to a later date.

CPT 11750: Permanent Nail Excision With Matrixectomy

CPT 11750 covers excision of the nail plate and permanent destruction of the nail matrix. The physician removes the nail plate, then destroys the matrix using phenol, sodium hydroxide, electrocautery, CO2 laser, or surgical excision. The goal is to prevent regrowth.

This code requires full-length removal of the nail plate or the entire nail plate, combined with destruction or permanent removal of the matrix by any means. A partial avulsion followed by phenol application qualifies. However, 11730 and 11750 cannot be billed together for the same digit on the same date. Under NCCI edits, 11750 is the Column 1 code. It bundles 11730. Billing both is double-dipping and will be denied.

CPT 11750 may only be performed once per digit in a lifetime. A second matrixectomy on the same toe is not separately billable under Medicare without strong documentation and the KX modifier indicating the medical necessity is on file.

How to Choose the Right Toenail Avulsion CPT Code

The operative note determines the correct nail avulsion CPT code. Not the diagnosis. Not the intent. What the physician actually did on the day of service.

If the nail plate was removed and the matrix was left intact, bill 11730. If the nail plate was removed and the matrix was destroyed by any means to prevent regrowth, bill 11750. If multiple nails were avulsed on the same date, bill 11730 for the first and 11732 for each additional nail.

11750 vs 11765

CPT 11765 covers wedge excision of the skin of the nail fold. This is a different procedure entirely. The physician excises a wedge of restrictive skin at the lateral margin of the nail fold to relieve an ingrown toenail. The nail plate itself is not removed.

Three combinations are never correct on the same digit on the same date of service. Billing 11730 with 11750 is incorrect. Billing 11730 with 11765 is incorrect. Billing 11750 with 11765 is also incorrect. Each of these pairs is bundled under the CMS LCD policy for the surgical treatment of nails.

CPT 11765 has no specified frequency limitation under Medicare, provided medical necessity is documented for each occurrence. However, local anesthesia via injection is required for this nail avulsion CPT code. Billing 11765 for removal of a small piece of skin or nail without local anesthesia is incorrect coding and will be denied.

ICD-10 Codes That Support Medical Necessity

Diagnosis codes should be clearly supporting the procedure. The following are some of the frequently used ICD-10 codes to support medically necessary CPT nail avulsions codes:

• L60.0:  In-growing nail (most common code for 11730 and 11750)
• L60.1: Onycholysis
• L60.2: Onychogryphosis
• L60.3: Nail Dystrophy
• L60.8: Other nail diseases (can use code alone for subungual abscess, subungual hematoma, periungual tumor, and melanoma)
• B35.1: Tinea Uniguim (onychomycosis) (this supports medical necessity for nail avulsions in case of fungal nail disease)

Combining nail avulsion CPT code with any other diagnosis code which is not included in the listed diagnoses will automatically result in a denial of medical necessity claim. Check diagnosis code against the coverage criteria in the LCD L33833 before submission.

Billing Rules, Modifiers, and Denial Triggers

These are the specific rules that determine whether nail avulsion claims get paid:

• Digit modifiers are required on every claim. CMS requires identification of the specific nail treated. Use HCPCS Level II T modifiers for toes: TA through T9. Use F modifiers for fingers: FA through F9. A claim without a digit modifier will be denied.
• Frequency limitations apply to 11730 and 11732. These codes are denied if billed for the same finger within 16 weeks or the same toe within 32 weeks of a previous avulsion. For a repeat avulsion within those windows, append modifier KX and ensure the medical record documents the specific clinical indication.
• CPT 11750 is a once-per-lifetime code per digit. A second matrixectomy on the same toe requires modifier KX and documentation of a new clinical indication such as an ingrown nail on the opposite border.
• Bilateral procedures on the same toe on the same day. If both the medial and lateral borders of one nail are treated, report one unit of service only. Do not bill separate nail avulsion CPT codes for each border.
• Operative documentation requirements under Medicare. The medical record must include the pre-operative diagnosis, clinical findings, a detailed description of the procedure, extent of nail involvement, type of anesthesia administered, post-operative observations, and patient instructions. Missing any of these elements is sufficient grounds for denial on audit.
• Bundling with E/M codes. If a separate evaluation and management service is performed on the same date as a nail avulsion, append modifier 25 to the E/M code. Without modifier 25, the E/M is bundled into the procedure and will not be reimbursed separately.

Conclusion

Nail avulsion billing looks straightforward. In practice, the codes are specific, the bundling rules are strict, and the frequency limitations catch practices that do not track prior procedure dates by digit. One wrong code pairing, one missing modifier, one ICD-10 code outside the covered list, and the claim is gone.

At Oregon Medical Billing, we handle podiatry coding at the procedure level. We verify digit modifiers, track frequency windows, confirm ICD-10 to CPT alignment, and document modifier KX cases before submission. Your nail avulsion claims go out correctly coded the first time.

FAQs

Q: What is the difference between 11750 and 11730? 

CPT 11730 covers temporary nail plate removal with the matrix left intact and the nail will regrow, while CPT 11750 covers permanent excision of the nail plate and matrix destruction by phenol, electrocautery, or laser to prevent regrowth entirely.

Q: What is the difference between CPT code 11750 and 11765? 

CPT 11750 removes the nail plate and permanently destroys the matrix, while CPT 11765 excises only a wedge of restrictive skin from the nail fold without removing the nail plate at all.

Q: What is CPT code 11730 for toenail removal? 

CPT 11730 is billed for a simple partial or complete avulsion of a single nail plate where the matrix is left intact, the nail will regrow, and the procedure covers all services performed on that nail on the date of service.

Q: What is the ICD-10 code for nail avulsion? 

The most common ICD-10 code for nail avulsion is L60.0 for ingrowing nail, though L60.1, L60.2, L60.3, L60.8, and B35.1 also support medical necessity depending on the clinical indication.