Diagnostic code
Diagnostic Code 6600: Bronchitis (Chronic) Rating Criteria
- CFR section
- 38 CFR § 4.97
- Rating range
- 10% to 100%
- Rating levels
- 4
- Body system
- Respiratory system
The VA rates Bronchitis (Chronic) under diagnostic code 6600 in 38 CFR § 4.97. The table below is the full set of rating criteria, from the schedule itself, with the evidence factors raters look for at each level.
DC 6600 rating criteria
| Rating | Criteria |
|---|---|
| 10% | FEV-1 of 71-80% or FEV-1/FVC of 71-80% or DLCO of 66-80% What raters look formild limitation |
| 30% | FEV-1 of 56-70% or FEV-1/FVC of 56-70% or DLCO of 56-65% What raters look formoderate limitation |
| 60% | FEV-1 of 40-55% or FEV-1/FVC of 40-55% or DLCO of 40-55% or max O2 consumption 15-20 ml/kg/min What raters look forsevere limitation |
| 100% | FEV-1 less than 40% or FEV-1/FVC less than 40% or DLCO less than 40% or max O2 consumption less than 15 ml/kg/min or cor pulmonale or pulmonary hypertension or requires outpatient oxygen What raters look forvery severe; oxygen therapy |
Condition guide
The rating criteria are only part of the picture for Chronic Bronchitis. The Chronic Bronchitis condition page covers service connection, common evidence problems, secondary conditions, and Board outcome patterns in depth.
Frequently asked questions
What is VA diagnostic code 6600?
Diagnostic code 6600 is the VA rating schedule entry for Bronchitis (Chronic), found in 38 CFR § 4.97. The VA assigns this code when it rates the condition and applies the criteria listed on this page.
What ratings are possible under DC 6600?
DC 6600 provides ratings of 10%, 30%, 60%, 100%. The percentage depends on which criteria your medical evidence documents, not on the diagnosis alone.
What does the highest rating under DC 6600 require?
The 100% rating for Bronchitis (Chronic) requires: FEV-1 less than 40% or FEV-1/FVC less than 40% or DLCO less than 40% or max O2 consumption less than 15 ml/kg/min or cor pulmonale or pulmonary hypertension or requires outpatient oxygen.