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Diaphragm paralysis or paresis
Diagnostic code 6840 · Respiratory system · 38 CFR 4.97
VA has proposed changing these rules
The proposal (87 FR 8474 (supplemental proposal 89 FR 74162, Sept. 12, 2024), published February 15, 2022) is not in effect. The rules on this page still apply until VA publishes a final rule.
Read the proposal in the Federal RegisterRating criteria: the exact regulation text
Quoted from 38 CFR 4.97. The "Rating" column is the percentage VA assigns for that level.
| Criteria | Rating |
|---|---|
| 6840 Diaphragm paralysis or paresis. |
General Rating Formula for Restrictive Lung Disease (diagnostic codes 6840 through 6845)
The formula's heading lists diagnostic code 6840.
| Criteria | Rating |
|---|---|
| General Rating Formula for Restrictive Lung Disease (diagnostic codes 6840 through 6845): | |
| FEV-1 less than 40 percent of predicted value, or; the ratio of Forced Expiratory Volume in one second to Forced Vital Capacity (FEV-1/FVC) less than 40 percent, or; Diffusion Capacity of the Lung for Carbon Monoxide by the Single Breath Method (DLCO (SB)) less than 40-percent predicted, or; maximum exercise capacity less than 15 ml/kg/min oxygen consumption (with cardiac or respiratory limitation), or; cor pulmonale (right heart failure), or; right ventricular hypertrophy, or; pulmonary hypertension (shown by Echo or cardiac catheterization), or; episode(s) of acute respiratory failure, or; requires outpatient oxygen therapy | 100 |
| FEV-1 of 40- to 55-percent predicted, or; FEV-1/FVC of 40 to 55 percent, or; DLCO (SB) of 40- to 55-percent predicted, or; maximum oxygen consumption of 15 to 20 ml/kg/min (with cardiorespiratory limit) | 60 |
| FEV-1 of 56- to 70-percent predicted, or; FEV-1/FVC of 56 to 70 percent, or; DLCO (SB) 56- to 65-percent predicted | 30 |
| FEV-1 of 71- to 80-percent predicted, or; FEV-1/FVC of 71 to 80 percent, or; DLCO (SB) 66- to 80-percent predicted | 10 |
| Or rate primary disorder. | |
| Note (1): A 100-percent rating shall be assigned for pleurisy with empyema, with or without pleurocutaneous fistula, until resolved. | |
| Note (2): Following episodes of total spontaneous pneumothorax, a rating of 100 percent shall be assigned as of the date of hospital admission and shall continue for three months from the first day of the month after hospital discharge. | |
| Note (3): Gunshot wounds of the pleural cavity with bullet or missile retained in lung, pain or discomfort on exertion, or with scattered rales or some limitation of excursion of diaphragm or of lower chest expansion shall be rated at least 20-percent disabling. Disabling injuries of shoulder girdle muscles (Groups I to IV) shall be separately rated and combined with ratings for respiratory involvement. Involvement of Muscle Group XXI (DC 5321), however, will not be separately rated. |
Notes for the whole table
1 Review for entitlement to special monthly compensation under § 3.350 of this chapter.
Related codes in the regulation
- 6841 Spinal cord injury with respiratory insufficiencySame formula
- 6842 Kyphoscoliosis, pectus excavatum, pectus carinatumSame formula
- 6843 Traumatic chest wall defect, pneumothorax, hernia, etcSame formula
- 6844 Post-surgical residual (lobectomy, pneumonectomy, etc.)Same formula
- 6845 Chronic pleural effusion or fibrosisSame formula
The VA exam form for this condition
VA examiners record their findings on a Disability Benefits Questionnaire (DBQ). Reading it shows you what the exam will measure and ask.
Rules that apply to this body system
Where this comes from
38 CFR 4.97, VA's Schedule for Rating Disabilities, from the official eCFR.
Regulation text current as of October 16, 2026.
Change history for this code (38 CFR Part 4, Appendix A): Added October 7, 1996.
Read it on eCFR.govInformation, not advice
This page shows the text of VA's rating regulation for information. It is not a rating estimate, and it is not legal or medical advice. VA decides every rating on the evidence in your file.
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