Inject skin lesions >7

CPT 11901 covers the injection of eight or more skin lesions during a single session, typically used for treating conditions like warts, keloids, or inflammatory skin lesions with medications such as corticosteroids or chemotherapy agents.

Showing rates for

National Average

Base Medicare rate

$67.93

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

0.8

PE RVU (NF)

1.23

MP RVU

0.07

Total RVU

2.1

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Accurately count and document the exact number of lesions injected to justify 11901 over 11900—the eight-lesion threshold is critical
Impact: Billing 11901 instead of 11900 increases Medicare reimbursement by approximately $33.26 (98% increase) in non-facility settings
Document the anatomic location of each injected lesion individually in the procedure note or use a body diagram
Impact: Prevents denials for insufficient documentation; audits specifically look for individualized lesion documentation, reducing appeal costs averaging $150-300 per claim
Bill in non-facility settings when possible, as the non-facility rate ($67.93) is 55% higher than facility rate ($43.67)
Impact: Setting optimization yields $24.26 additional revenue per procedure when performed in office versus hospital outpatient
Do not bill 11901 with lesion destruction codes (17000-17286) for the same lesions; these are mutually exclusive procedures
Impact: Prevents NCCI bundling denials that require time-consuming appeals; if both performed on different lesions, use modifier 59 and document separately
Include the medication name, concentration, and total volume in documentation to support medical necessity and proper drug billing
Impact: Enables separate reimbursement for medications via J-codes when applicable; triamcinolone (J3301) can add $5-15 per claim depending on dosage
For cosmetic indications (keloid treatment for appearance only), verify coverage or obtain ABN; most payers deny cosmetic injections
Impact: Advance Beneficiary Notice collection allows patient billing when Medicare denies, recovering the $67.93 that would otherwise be written off

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Frequently asked questions

What is the difference between CPT code 11900 and 11901?

The only difference is the number of lesions injected: CPT 11900 covers injection of up to 7 skin lesions, while CPT 11901 covers injection of 8 or more lesions. The Medicare reimbursement for 11901 ($67.93 non-facility) is approximately double that of 11900 ($34.67), making accurate lesion counting and documentation critical.

How much does Medicare pay for CPT code 11901 in 2025?

Medicare pays $67.93 for CPT 11901 in non-facility settings and $43.67 in facility settings based on the 2025 national average rates. Actual payment may vary by geographic locality based on the GPCI adjustments applied to your specific area.

Can I bill an E/M visit with CPT 11901 on the same day?

Yes, you can bill an E/M service with 11901 on the same day if the E/M represents a separately identifiable service beyond the usual pre-procedure and post-procedure work. You must append modifier 25 to the E/M code and document the separate nature of the evaluation, such as assessment of new problems or comprehensive review beyond the injection procedure itself.

What diagnosis codes are typically used with CPT 11901?

Common diagnosis codes include L73.2 (hidradenitis suppurativa), L91.0 (keloid scar), L40.0 (psoriasis vulgaris), L63.9 (alopecia areata), L70.0 (acne vulgaris), B07.9 (viral warts), and L92.9 (granulomatous disorder of skin). The diagnosis must support medical necessity for intralesional injection therapy.

Is CPT 11901 covered for cosmetic injections?

No, Medicare and most commercial payers do not cover CPT 11901 for purely cosmetic indications. The procedure must be medically necessary to treat symptomatic conditions. For keloids or scars treated primarily for appearance, obtain an Advance Beneficiary Notice (ABN) before the procedure to allow patient billing if denied.

Can CPT 11901 be billed with lesion destruction codes on the same day?

Generally no, not for the same lesions. NCCI edits bundle injection and destruction codes when performed on identical lesions. However, if you inject some lesions and destroy different lesions during the same visit, you can bill both procedures using modifier 59 on the secondary code with clear documentation distinguishing which lesions received which treatment.

What medications can be billed separately when performing CPT 11901?

Injectable medications may be separately billable using J-codes, such as J3301 (triamcinolone acetonide), J9000 (doxorubicin), or J9190 (fluorouracil). Medicare Part B covers certain drugs when medically necessary. Document the drug name, NDC code, dosage, and total units administered. Some payers include medication in the procedure payment, so verify coverage policies before separate billing.