08-15-2025
Scenario #1: Mastectomy
- Needle Bx RUOQ + invasive ductal carcinoma, Grade 3
- Right Modified Mastectomy w/ Lymph node Dissection
- Treated w AC-T Chemotherapy Regimen
- Photon External Beam to Chest wall and nodes 5000 cgy, 25 fx, 200/fx; electron boost 1000 cgy, 5 fx, 250/fx
Question: How will you code the Phase I-II Radiation Primary Treatment Volume?
- 04 Breast/ Chest wall lymph node regions
- 40 Breast-whole
- 41 Breast – partial
- 42 Chest wall
Answer: 42 Chest wall {Phase I & Phase II Record Code 42 Chest wall for Treatment volume following a mastectomy}
Scenario #2: Partial Mastectomy
- Needle Bx RUOQ + DCIS
- Right Breast Partial Mastectomy
- Photon External Beam to Breast 4005 cgy, 15 fx, 267/fx; 3D boost 1200 cgy, 5 fx, 240/fx
Question: How will you code the Phase I, II Radiation Primary Treatment Volume?
- 04 Breast/ Chest wall lymph node regions
- 40 Breast-whole
- 41 Breast – partial
- 42 Chest wall
Answer:
- Phase I 40 Breast-whole
- Phase II 41 Breast partial
References:
- STORE- Phase I-II-III Radiation Primary Treatment Volume coding instructions
- APPENDIX R: CTR Guide to Coding Radiation Therapy Treatment in the STORE
