CPT code 11900: Lesion injection, up to seven lesions2026 Medicare rate & RVUs in Florida
Reports medication injected directly into one to seven skin lesions, such as keloids or hypertrophic scars, during a single treatment session.
Medicare pays $55.95–$60.90 for 11900 in the office in Florida, from Rest of Florida to Miami, FL. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What 11900 covers
A clinician injects medication directly into skin lesions, commonly using an intralesional corticosteroid for keloids, hypertrophic scars, or selected inflammatory lesions. Dermatologists and other clinicians who treat these conditions perform the service in office settings and, less often, in facility settings. The code is selected by the number of lesions treated, not the number of needle passes or the medication volume; it covers treatment of one through seven lesions. More than seven lesions are reported with 11901.
Document the treated lesions and their number, the medication and dose, and the clinical reason for injection. The medication may be reported separately when applicable and supported by documentation. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and others at 50%. Modifier 50 is inappropriate. Assistant-at-surgery payment is restricted, and co-surgeon and team-surgery reporting are not permitted.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Where 11900 pays more and less in Florida
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$55.95 to $60.90
| Payment locality | Office | Facility |
|---|---|---|
| Fort Lauderdale, FL | $58.63 | $25.47 |
| Miami, FL | $60.90 | $26.82 |
| Rest of Florida | $55.95 | $24.65 |
How the 11900 rate is calculated
Each of 11900’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 11900
RVUs × geographic indexes × conversion factor
Work0.51
0.51 RVUs× 1.000 GPCI
Practice expense1.14
1.14 RVUs× 1.000 GPCI
Malpractice0.05
0.05 RVUs× 1.000 GPCI
Adjusted RVUs
1.7000
Conversion factor
$33.4009
Medicare rate
$56.78
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 11900
The CMS indicators that decide how 11900 is paid alongside other services.
CMS payment indicators · 11900
Lesion injection, up to seven lesions
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 000 | Same-day global: pre- and post-op care on the day of the procedure is included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
What modifiers do to the payment
Modifier 51 · payment effect
With and without the modifier
11900 without 51 · national office
$56.78
Lesion injection, up to seven lesions
11900-51 · Second procedure: 50%
$28.39
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
11900 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 11901Lesion injectionMore than seven lesions
- Use 11900 for one through seven treated lesions; use 11901 when more than seven are injected.
- 11920Skin tattooingUp to 6 square centimeters
- 11920 describes skin-color correction by tattooing, selected by treated surface area; 11900 is for medication injected into lesions.
- 17110Benign lesion destructionUp to 14 lesions
- 17110 is for destruction of eligible benign lesions. Choose 11900 when medication is injected into the lesions instead.
11900 billing questions
How many lesions qualify for 11900?
Report 11900 for treatment of one through seven lesions in the session. Use 11901 when more than seven lesions are treated.
Do separate injections into one lesion count as multiple lesions?
No. Select the code by the number of distinct lesions treated, not the number of needle passes or injection sites within a lesion.
Can the injected medication be billed separately?
The medication may be reported separately when applicable. Document the drug and dose, and follow the applicable drug-code requirements.
Is modifier 50 appropriate when lesions are on both sides of the body?
No. CMS identifies bilateral adjustment as inappropriate for 11900; report the service based on the number of lesions treated.
How does the 0-day global period affect same-day care?
Same-day preoperative and postoperative care is included in the procedure. CMS applies the standard multiple-procedure reduction when other procedures are performed in the same session.
Can an assistant or co-surgeon be reported?
CMS does not pay an assistant at surgery for this code. Co-surgeons and team surgery are not permitted.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file lines behind this rate
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