CPT 17311 Mohs Micrographic Surgery – First Stage Explained

Mohs Micrographic Surgery is a specialized surgical technique used to treat certain types of skin cancer with high precision. CPT 17311 is used to report the first stage of Mohs surgery, where the visible tumor is removed and examined immediately to ensure clear margins while preserving healthy tissue.

This procedure is commonly performed for skin cancers on sensitive or high-risk areas such as the face, scalp, ears, hands, feet, and genital regions. Mohs surgery is known for its accuracy and high cure rates, making it a preferred option for dermatologists across the United States.

What CPT 17311 Covers

CPT 17311 includes the initial stage of Mohs Micrographic Surgery and covers all work related to that first stage. This includes removal of the tumor, tissue mapping, microscopic examination, and interpretation by the surgeon. It applies when up to five tissue blocks are processed during the first stage.

If cancer cells are still present after the first stage, additional stages are performed and reported using add-on codes. Proper documentation is essential to support medical necessity and accurate billing.

When CPT 17311 Is Commonly Used

Dermatology practices in cities like New York, Los Angeles, Chicago, Houston, Phoenix, Miami, and Dallas frequently report CPT 17311 for patients diagnosed with basal cell carcinoma or squamous cell carcinoma. This code is widely accepted by Medicare and commercial payers when billed correctly.

Clear operative notes, lesion location details, and stage documentation help reduce denials and speed up reimbursement.

Billing and Documentation Tips

Accurate billing for CPT 17311 depends on strong clinical documentation. Providers should clearly note the anatomic site, number of tissue blocks, and confirmation that this is the first stage of Mohs surgery. Repair or closure of the surgical wound should be billed separately based on the type of repair performed.

Many practices also review their billing workflows and credentialing processes regularly to ensure compliance. If you need help, you can always contact us for guidance on Mohs surgery billing and documentation best practices.

How Theiatrics Supports Dermatology Practices

Theiatrics works with dermatology providers across the USA to simplify medical billing, coding, and credentialing. From Mohs surgery coding to claims follow-up and denial management, Theiatrics helps practices stay compliant and improve revenue without added stress.

FAQs

1. What does CPT 17311 represent?
CPT 17311 is used for the first stage of Mohs Micrographic Surgery, including tissue removal and microscopic examination.

2. Can CPT 17311 be billed more than once?
No, it is billed only once per Mohs procedure. Additional stages are billed using add-on codes.

3. Is pathology billed separately with CPT 17311?
No, pathology services are included in the Mohs surgery code.

4. Can wound repair be billed with CPT 17311?
Yes, wound repair can be billed separately based on the type and complexity of the closure.

5. Is CPT 17311 covered by insurance?
Yes, most US insurance providers cover CPT 17311 when medical necessity and documentation are met.