Home › Rating Schedule › Respiratory System
Diagnostic Code 6520: Larynx, stenosis of, including residuals of laryngeal trauma (unilateral or bilateral)
Respiratory System · 38 CFR §4.97 · All codes in this system
| Evaluation criteria | Rating |
|---|---|
| Forced expiratory volume in one second (FEV-1) less than 40 percent of predicted value, with Flow-Volume Loop compatible with upper airway obstruction, or; permanent tracheostomy | 100% |
| FEV-1 of 40- to 55-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction | 60% |
| FEV-1 of 56- to 70-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction | 30% |
| FEV-1 of 71- to 80-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction | 10% |
| Note: Or evaluate as aphonia (DC 6519). | |
Use this rating
Open the combined ratings calculator with this percentage already entered, then add your other rated conditions:
100% in the calculator 60% in the calculator 30% in the calculator 10% in the calculator
Source: eCFR Title 38, 38 CFR §4.97, current as of 2026-11-05. Criteria text is the regulatory text, reproduced verbatim for reference; it is not legal advice.