CPT® Code 11900 is used to report intralesional injections administered into up to 7 lesions. This procedure involves injecting medication directly into skin lesions to treat conditions such as inflammation, scarring, or abnormal tissue growth.
Intralesional injections are commonly performed in dermatology and other outpatient settings to deliver targeted therapy with localized effect.
Key Facts About CPT® 11900
- Service type: Therapeutic procedure (injection)
- Procedure: Intralesional injection
- Lesion count: Up to and including 7 lesions
- Medication: Reported separately (e.g., corticosteroids)
- Setting: Office or outpatient clinic
- Provider type: Physicians and qualified healthcare professionals
Common clinical indications:
- Keloids and hypertrophic scars
- Acne cysts or nodules
- Alopecia areata
- Psoriatic plaques
- Other inflammatory or proliferative skin lesions
When to Use CPT® 11900
CPT 11900 is appropriate when:
- Medication is injected directly into skin lesions
- Up to 7 lesions are treated in a single session
- The procedure is performed for therapeutic purposes
- The lesions are distinct and clinically documented
Examples:
- Injecting corticosteroids into multiple keloid scars
- Treating inflammatory acne cysts with intralesional therapy
- Managing alopecia areata with localized injections
- Treating hypertrophic scars with targeted medication delivery
Documentation Requirements
To support CPT 11900 billing, documentation should include:
- Patient identifiers and date of service
- Number and location of lesions treated (≤7)
- Diagnosis supporting medical necessity
- Medication used, dosage, and concentration
- Injection technique and sites
- Patient response and tolerance
- Post-procedure instructions and follow-up
- Provider signature and credentials
Accurate lesion count and detailed procedural documentation are essential for compliant billing.
Reimbursement and Coding Considerations
- CPT 11900 is generally reimbursed when medically necessary
- Report 11901 when more than 7 lesions are treated
- Medication supply (e.g., J-codes) should be billed separately
- Do not report per lesion, this code covers total lesions up to 7
- May be billed with E/M services if separately identifiable (modifier 25 may apply)
- Cosmetic indications may not be covered
Always verify payer-specific policies for dermatologic procedures and injectable medications.
How OptiMantra Supports Intralesional Injection Billing
OptiMantra’s integrated EMR and practice management system streamlines documentation and billing for CPT 11900:
With OptiMantra, providers can:
- Document lesion count, location, and treatment details in customizable templates
- Track medication usage, dosage, and injection sites
- Link procedures to diagnoses and treatment plans
- Maintain organized clinical and billing records that support compliance and audit preparedness
- Monitor patient response and follow-up care
By centralizing procedural documentation, OptiMantra helps practices improve efficiency, ensure compliance, and optimize reimbursement.
Try OptiMantra for free here!
Disclaimer: CPT® codes are maintained by the American Medical Association. This guide is for informational purposes only and does not replace official coding guidelines or payer policies.
.png)
