38900 Io map of sent lymph node
Also known as: SLNB, sentinel node mapping, IO map
Intraoperative mapping of sentinel lymph node using radioisotope or fluorescent tracer during surgical excision. This technique identifies the first lymph node that drains from a tumor site to assess lymphatic spread.
In Plain Language
mapping the first lymph node to check for cancer spread; testing lymph nodes near cancer
Clinical Context
Essential in breast cancer surgery, melanoma, head and neck cancers to determine staging and extent of lymph node dissection needed. Helps avoid unnecessary removal of multiple lymph nodes.
RVU Breakdown
| Work RVU | 2.44 |
| Total RVU | 2.44 |
Est. Medicare Payment
National estimate based on 2026 CMS PFS Conversion Factor ($33.40). Actual payment varies by locality (GPCI adjustment).
Billing & Documentation
As a surgical CPT code, proper documentation must include the operative report detailing the procedure performed, patient positioning, approach, findings, and any complications. Ensure the diagnosis code (ICD-10) supports medical necessity for the procedure.
How This Code Compares
With a work RVU of 2.44, this code ranks in the 17th percentile among Surgery codes — 3.3x below the median (8.00). The highest wRVU in this category is 106.19.
Specialties
Frequently Asked Questions
What is CPT code 38900?
CPT 38900 (Io map of sent lymph node) is a Surgery code. Intraoperative mapping of sentinel lymph node using radioisotope or fluorescent tracer during surgical excision. This technique identifies the first lymph node that drains from a tumor site to assess lymphatic spread.
What is the wRVU value for CPT 38900?
The work RVU for CPT 38900 is 2.44. This code is primarily used by Surgical Oncology, General Surgery, Plastic Surgery.
When is CPT 38900 used?
Essential in breast cancer surgery, melanoma, head and neck cancers to determine staging and extent of lymph node dissection needed. Helps avoid unnecessary removal of multiple lymph nodes.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.