Inject skin lesions </w 7

CPT code 11900 covers the injection of up to 7 skin lesions with medication. This is commonly used to treat conditions like warts, keloids, or psoriatic plaques by injecting steroids or other therapeutic agents directly into the affected skin areas.

Showing rates for

National Average

Base Medicare rate

$55.64

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

0.52

PE RVU (NF)

1.15

MP RVU

0.05

Total RVU

1.72

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

NCCI bundling edits

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Billing tips

Count and document the exact number of lesions injected (up to 7). If treating more than 7 lesions, use add-on code 11901 for each additional lesion.
Impact: Undercoding by failing to use 11901 for 8+ lesions can result in 50-70% revenue loss on appropriate cases
Verify place of service coding carefully: POS 11 (office) yields $55.64 vs POS 22 (hospital outpatient) yields $28.46, a $27.18 difference per session
Impact: Incorrect POS coding can reduce payment by 49% or trigger overpayment recovery
Document medical necessity with diagnosis codes specifying lesion type and location (e.g., L91.0 for keloid scar, B07.9 for viral warts)
Impact: Missing or non-specific diagnosis codes are the #1 cause of denial, affecting 100% of payment
Record the medication name, concentration, and total volume injected per lesion in procedure notes
Impact: Lack of drug documentation can result in denial on audit; proper documentation supports medical necessity defense worth full claim value
When billing with E/M service, ensure documentation clearly shows the E/M was separately identifiable (new complaint, additional problem assessment) and append modifier 25 to E/M code
Impact: Properly documented modifier 25 can add $75-150 to visit reimbursement; improper use triggers high audit risk
Bill injection administration separately from medication supply when applicable (J-codes for drugs like triamcinolone J3301)
Impact: Can add $5-25 per session depending on drug cost and payer policy

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Frequently asked questions

What is the Medicare reimbursement for CPT 11900 in 2025?

The 2025 Medicare national average reimbursement for CPT 11900 is $55.64 in non-facility settings (office) and $28.46 in facility settings (hospital outpatient). Actual payment may vary by geographic locality based on GPCI adjustments.

How many lesions can I inject under CPT code 11900?

CPT 11900 covers injection of up to 7 skin lesions. If you inject 8 or more lesions, you must use 11900 for the first 7 lesions and add-on code 11901 for each additional lesion beyond 7.

Can I bill an office visit and CPT 11900 on the same day?

Yes, you can bill an E/M service with CPT 11900 on the same day if the E/M represents a separately identifiable service (addressing a different problem or significant additional evaluation). You must append modifier 25 to the E/M code and document the separate nature of the services clearly.

What is the work RVU for CPT code 11900?

The 2025 work RVU for CPT 11900 is 0.52, with practice expense RVU of 1.15 (non-facility) or 0.31 (facility), and malpractice RVU of 0.05, for a total non-facility RVU of 1.72.

What diagnosis codes are commonly used with CPT 11900?

Common diagnosis codes include L91.0 (keloid scar), L73.2 (hidradenitis suppurativa), L40.0 (psoriasis vulgaris), B07.9 (viral wart unspecified), L63.9 (alopecia areata), and L70.0 (acne vulgaris with cysts). The specific code must support medical necessity for injection therapy.

Is CPT 11900 covered for cosmetic indications?

No, Medicare and most commercial payers do not cover CPT 11900 for purely cosmetic indications. Coverage requires medical necessity such as symptomatic keloids, painful acne cysts, or therapeutic treatment of inflammatory skin conditions. Cosmetic scar improvement alone is typically non-covered.

How do I bill for the medication used in lesion injections?

The medication is billed separately using appropriate J-codes (e.g., J3301 for triamcinolone acetonide injection). CPT 11900 covers only the injection procedure itself, not the drug supply. Document the drug name, NDC, dosage, and units administered to support the J-code claim.