C32.1 (Malignant neoplasm of supraglottis) compared with D49.1 (Neoplasm of unspecified behavior of respiratory system), from the official CMS tabular data. C32.1 and D49.1 name the same anatomical site (aryepiglottic fold) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — primary malignancy (aryepiglottic fold)
The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.
Source: CMS Table of Neoplasms
Same site, different neoplasm behavior. D49.1 and C32.1 name the same anatomical site (aryepiglottic fold) with a different neoplasm behavior.
From the CMS/CDC Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.
| C32.1Malignant neoplasm of supraglottis | D49.1Neoplasm of unspecified behavior of respiratory system | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of supraglottis is a billable ICD-10-CM diagnosis code (C32.1). | Neoplasm of unspecified behavior of respiratory system is a billable ICD-10-CM diagnosis code (D49.1). |
| Includes | malignant neoplasm of middle ear Malignant neoplasm of aryepiglottic fold or interarytenoid fold, laryngeal aspect Malignant neoplasm of epiglottis (suprahyoid portion) NOS Malignant neoplasm of extrinsic larynx | 'growth' NOS neoplasm NOS new growth NOS tumor NOS |
| Use additional code | code to identify: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources