C32.8
BillableMalignant neoplasm of overlapping sites of larynx
HCC Category Mapping
V28HCC 21 — Breast, Prostate, Colorectal and Other Cancers and Tumors
0.545V24HCC 11 — Colorectal, Bladder, and Other Cancers
0.306ESRDHCC 11 — Colorectal, Bladder, and Other Cancers
0.000What This Code Means
Cancer that involves multiple different areas of the larynx (voice box) at the same time.
Coding Tips
- •Use this code only when the tumor clearly spans two or more distinct laryngeal subsites
- •If a single subsite is involved, use the specific site code instead
Clinical Significance
Overlapping sites of larynx indicates a malignancy that spans two or more laryngeal subsites (e.g., glottic-supraglottic or transglottic tumors). These are often locally advanced cancers with worse prognosis than single-subsite tumors. Transglottic cancers are particularly significant because they frequently require total laryngectomy.
Documentation Requirements
- ✓Laryngoscopy documenting tumor involvement of multiple laryngeal subsites
- ✓Imaging confirming extent of disease across subsites
- ✓Pathology with histological type
- ✓TNM staging reflecting the multi-subsite involvement
- ✓Treatment plan including voice preservation assessment
Commonly Confused Codes
C32.0 — Glottic cancer: If the primary site is clearly glottic with only minor extension, code as glotticC32.1 — Supraglottic cancer: If the primary site is clearly supraglottic with minimal inferior extension, code as supraglotticC32.9 — Larynx, unspecified: Do not use unspecified when overlapping sites are documentedC10.1 — Anterior epiglottis (oropharynx): Ensure oropharyngeal extension is coded separately if present
Code Hierarchy
└C32Malignant neoplasm of larynx└C32.8Malignant neoplasm of overlapping sites of larynx
└C32.8Malignant neoplasm of overlapping sites of larynx