L60.0 ICD-10 Code: Ingrown Nail Billing Guide for Podiatry

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L60.0 is the ICD-10-CM diagnosis code for ingrowing nail, also known as onychocryptosis or unguis incarnatus. It is a billable, specific code classified under Chapter 12 (Diseases of the Skin and Subcutaneous Tissue) within the Nail disorders category (L60). Podiatry practices use L60.0 on nearly every ingrown toenail claim, and it pairs with the nail avulsion and matrixectomy CPT codes that drive a large share of procedural revenue in podiatric surgery. L60.0 does not include laterality, so toe modifiers on the CPT code line are required to identify which digit was treated.

CPT pairing:
L60.0 pairs with CPT 11730 (avulsion of nail plate, partial or complete, simple), CPT 11732 (each additional nail plate, add-on), and CPT 11750 (excision of nail and nail matrix, permanent removal). The CPT code depends on whether the procedure is a simple avulsion or a matrixectomy.

Infection coding:
When the ingrown nail is infected, add L03.031 (cellulitis, right great toe) or L03.032 (cellulitis, left great toe) alongside L60.0. L60.0 alone does not indicate infection. The infection code is what justifies medical necessity when the payer requires documentation of a complicating condition.

Modifier requirement:
Use HCPCS toe modifiers on the CPT code line: TA for left great toe, T5 for right great toe, T1 through T4 for left lesser toes, and T6 through T9 for right lesser toes. The modifier identifies which digit was treated and is required for claim processing.

What L60.0 Means in Medical Billing

L60.0 identifies an ingrowing nail in the ICD-10-CM classification system. The code sits in Chapter 12, which covers diseases of the skin and subcutaneous tissue, under the L60 through L75 block that groups disorders of skin appendages. Category L60 covers all nail disorders, and L60.0 is the specific code for a nail that grows into the surrounding skin, causing pain, inflammation, and potential infection.

The code applies to any nail, not just toenails, although the vast majority of L60.0 claims in podiatry involve the hallux (great toe). L60.0 does not carry laterality within the ICD-10 code itself, which means the code is the same regardless of which toe or which foot is affected. Laterality and digit identification are handled by the HCPCS toe modifiers appended to the CPT code, not by the diagnosis code.

L60.0 is a fully billable code and can serve as the primary diagnosis on professional claims for both conservative and surgical management of ingrown nails. It supports medical necessity for E/M visits, nail avulsions, matrixectomies, and antibiotic prescriptions when the documentation establishes an ingrown nail under active treatment.

At Podiatry Bill Co, the most common billing issue we see across the practices we match with billing partners is the failure to add infection codes alongside L60.0 when the clinical documentation clearly describes cellulitis, drainage, or purulence. That omission costs the practice nothing on the claim itself, but it weakens the medical necessity justification when a payer audits the procedure, especially for Medicare patients where routine foot care exclusions apply.

How to Bill L60.0 with Podiatry CPT Codes

L60.0 is the diagnosis. The CPT code is the procedure. The pairing must make clinical sense for the claim to process cleanly. Ingrown nail procedures in podiatry use a small family of CPT codes, and selecting the right one depends on what the podiatrist actually did during the encounter.

CPT Code	Descriptor	Use	Global Period
11730	Avulsion of nail plate, partial or complete, simple; single	First nail avulsion	0 days
11732	Each additional nail plate (add-on to 11730)	Second+ nail same session	0 days
11750	Excision of nail and nail matrix, partial or complete, for permanent removal	Matrixectomy (chemical or surgical)	0 days
11765	Wedge excision of skin of nail fold	Excision of hypertrophied nail fold	0 days

CPT 11730 is the workhorse code for ingrown toenail procedures. It covers partial or complete avulsion of a single nail plate, which is the standard treatment for most non-recurrent ingrown nails. When the podiatrist avulses more than one nail during the same session, the first nail is billed under 11730 and each additional nail is billed under 11732 as an add-on code. For a detailed breakdown of the avulsion code and its billing rules, see our guide on CPT code 11730.

CPT 11750 applies when the podiatrist performs a matrixectomy, which is the partial or complete destruction of the nail matrix to prevent regrowth of the offending nail border. This is the procedure for recurrent ingrown nails where simple avulsion has failed. Chemical matrixectomy using phenol or sodium hydroxide and surgical excision of the matrix both bill under 11750. The documentation must specify that the matrix was treated, not just the nail plate. For the permanent removal code and its documentation requirements, see our CPT code 11750 guide.

Both 11730 and 11750 carry a 0-day global period, which means follow-up visits on any subsequent date of service can be billed separately with an appropriate E/M code.

How to Code an Infected Ingrown Nail

L60.0 by itself identifies the ingrown nail but does not indicate infection. When the ingrown nail presents with cellulitis, purulent drainage, or abscess, the infection must be coded separately. This is not optional coding; it is a clinical and billing requirement that affects medical necessity, Medicare coverage, and reimbursement.

For an infected ingrown toenail on the great toe, the coding is L60.0 (ingrowing nail) plus L03.031 (cellulitis, right great toe) or L03.032 (cellulitis, left great toe). The L03 codes carry laterality for the great toe specifically. For lesser toe infections, use L03.039 (cellulitis of unspecified toe) since the ICD-10-CM code set does not provide individual lesser toe cellulitis codes.

The infection code matters most for Medicare claims. Medicare generally considers ingrown toenail treatment as routine foot care, which is excluded from coverage unless a qualifying systemic condition or a complicating condition is present. An infection documented with L03.031 or L03.032 is a complicating condition that supports medical necessity and moves the claim from excluded routine care to covered non-routine care. Without the infection code on the claim, Medicare will deny the service as routine foot care, even if the patient was clearly infected at the time of the procedure.

One pattern we see frequently when matching podiatry practices with billing partners is the provider documenting infection in the note but the biller omitting the L03 code from the claim, either because they did not read the note carefully or because the EHR did not prompt for the secondary diagnosis. That omission is the single most common cause of ingrown nail denials on Medicare claims across the practices we work with.

Toe Modifiers for L60.0 Claims

Every ingrown nail claim requires a HCPCS toe modifier on the CPT code line to identify which digit was treated. Without the modifier, the claim will be rejected or denied for insufficient information. The modifier goes on the CPT code, not on the ICD-10 code.

Modifier	Description	Common Use
TA	Left foot, great toe	Left hallux ingrown nail
T5	Right foot, great toe	Right hallux ingrown nail
T1	Left foot, second digit	Left second toe ingrown nail
T6	Right foot, second digit	Right second toe ingrown nail
T2 through T4	Left foot, third through fifth digit	Left lesser toe ingrown nail
T7 through T9	Right foot, third through fifth digit	Right lesser toe ingrown nail

When the podiatrist treats ingrown nails on multiple toes during the same session, each toe gets its own modifier. The first nail avulsion is billed as 11730 with the modifier for that toe, and each additional nail is billed as 11732 with the modifier for its toe. For practices that also bill an E/M with the procedure, modifier 25 goes on the E/M code, not on the procedure code. For the latest on how modifier 25 reimbursement is changing for podiatry, see our coverage of the modifier 25 podiatry payment cut for 2027.

Medicare Coverage Rules for Ingrown Nail Treatment

Medicare treats ingrown toenail procedures differently from most other podiatric services, and the coverage determination hinges on whether the treatment qualifies as routine foot care or non-routine care. This distinction is the single largest source of ingrown nail denials on Medicare claims.

Routine foot care, which includes trimming nails and treating common foot ailments in the absence of a systemic condition or local complication, is excluded from Medicare coverage under the Medicare Benefit Policy Manual. An uncomplicated ingrown toenail in an otherwise healthy patient is classified as routine foot care and will be denied.

Non-routine care is covered. The ingrown nail claim becomes non-routine when the documentation establishes either a qualifying systemic condition (such as diabetes with peripheral neuropathy, peripheral vascular disease, or other conditions that create a hazardous foot care risk) or a complicating local condition (such as infection, abscess, or granulation tissue). The infection codes L03.031 or L03.032 are the most common complicating conditions that move ingrown nail claims from excluded to covered under Medicare.

Practices that treat a high volume of Medicare patients need their billing team to verify the complicating or systemic condition on every ingrown nail claim before submission. If the patient has diabetes with neuropathy (E11.40 through E11.49) or peripheral vascular disease (I73.9), those codes should appear on the claim alongside L60.0. For a broader look at how Medicare routine foot care billing rules affect podiatry claims, see our guide on the Q8 modifier and Medicare routine foot care billing.

Providers often come to us at Podiatry Bill Co after watching Medicare denials on ingrown nail claims pile up, and the root cause is almost always the same: the provider documented the complicating condition in the note, but it never made it onto the claim. A billing partner that builds a Medicare coverage check into the claim workflow prevents those denials before they reach the payer.

L60.0 and Related Nail Disorder Codes

L60.0 belongs to a family of nail disorder codes under category L60. Several of these codes apply to conditions that coexist with or are confused with ingrown nails, and using the wrong one changes the claim.

L60.0 (Ingrowing nail) is the code for a nail that grows into the periungual skin. Use it when the documentation describes onychocryptosis, unguis incarnatus, or an ingrown nail of any digit. B35.1 (Tinea unguium) is the code for fungal nail infection (onychomycosis), which is a different condition that affects the nail plate itself rather than the nail-skin junction. B35.1 and L60.0 can coexist on the same patient and can both appear on the same claim when the ingrown nail is present alongside a fungal infection.

L60.1 (Onycholysis) covers nail plate detachment from the nail bed, which is not an ingrown nail. L60.2 (Onychogryphosis) covers thickened, curved nails, commonly seen in elderly patients and sometimes confused with ingrown nails in the documentation. L84 (Corns and callosities) is a related podiatry code that sometimes appears alongside L60.0 when the ingrown nail has caused callus formation along the nail fold.

The key coding principle is that L60.0 describes the ingrown nail itself, the L03 codes describe any associated infection, and any coexisting nail or skin condition gets its own separate ICD-10 code. Combining all of these on a single claim is not only permissible but necessary for accurate reimbursement and medical necessity documentation.

Common L60.0 Billing Mistakes

These are the errors that cause the most ingrown nail denials across podiatry practices.

• Omitting the infection code when infection is documented. If the note describes cellulitis, drainage, or purulence, L03.031 or L03.032 must appear on the claim. Without it, Medicare will classify the service as routine foot care and deny it. This is the number one ingrown nail billing mistake.
• Missing the toe modifier. Every nail procedure requires a HCPCS toe modifier (TA, T5, T1 through T9) on the CPT code line. A claim without the modifier will be rejected at the clearinghouse or denied by the payer for incomplete information.
• Billing 11750 when only an avulsion was performed. If the podiatrist avulsed the nail border without treating the matrix, the code is 11730 (avulsion), not 11750 (matrixectomy). The documentation must specify matrix destruction to support 11750. Upcoding from 11730 to 11750 without documentation of matrix treatment is a compliance risk.
• Not billing the E/M when a separately identifiable evaluation was performed. When the podiatrist evaluates the ingrown nail, makes a clinical decision, and performs the procedure in the same visit, the E/M is separately billable with modifier 25 if the documentation supports a significant, separately identifiable service beyond the procedure itself. Many practices leave this revenue on the table by billing only the procedure code.
• Using L60.0 without a complicating or systemic condition on Medicare claims. For Medicare patients, an uncomplicated ingrown nail in an otherwise healthy patient is excluded from coverage. The claim needs either an infection code (L03.031, L03.032) or a qualifying systemic condition (diabetes with neuropathy, PVD) to support coverage. Submitting L60.0 alone to Medicare will result in a denial.

In our experience matching podiatry practices with billing partners, the practices with the lowest denial rates on ingrown nail claims are the ones that build a two-step check into every claim: confirm the toe modifier is on the CPT line, and confirm the infection or systemic condition code is on the claim for Medicare patients. Those two checks prevent the majority of L60.0 denials.

Frequently Asked Questions

Next Steps

• Need the full billing guide for the nail avulsion code? See our breakdown of CPT code 11730 for the procedure code that drives the majority of ingrown toenail claims.
• Billing matrixectomies for recurrent ingrown nails? Our CPT code 11750 guide covers the permanent removal code, documentation requirements, and the distinction from simple avulsion.
• Treating fungal nails alongside ingrown nails? See our guide on ICD-10 code B35.1 (tinea unguium) for the onychomycosis code that frequently coexists with L60.0 on the same claim.
• Ready to hand podiatry billing off to a team that knows nail procedure coding, Medicare routine foot care rules, and payer-specific modifier requirements? Get matched with vetted podiatry billing companies, free.