Diagnostic Code 6600RespiratoryDiseases of the Trachea and Bronchi38 CFR 4.97

Chronic Bronchitis

Chronic bronchitis is long-term inflammation of the bronchial tubes with a persistent productive cough. VA rates it on the same pulmonary function test criteria used for COPD.

Presumptive condition PACT Act - burn pits / airborne hazards

Chronic bronchitis is on the PACT Act presumptive list for veterans with qualifying burn-pit-era service: the Southwest Asia theater on or after August 2, 1990, or Afghanistan, Djibouti, Egypt, Jordan, Lebanon, Syria, Uzbekistan, Yemen, or their airspace on or after September 11, 2001.

How the VA rates it

Rated under diagnostic code 6600 on objective pulmonary function tests: FEV-1 (percent of predicted), FEV-1/FVC ratio, or DLCO. Meeting any single criterion in a tier qualifies. The 100 percent level can also be met through outpatient oxygen therapy, cor pulmonale, pulmonary hypertension, or acute respiratory failure.

Rating criteria by percentage

Rated up to 100%
100%

FEV-1 less than 40 percent predicted, or FEV-1/FVC less than 40 percent, or 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, or right ventricular hypertrophy, or pulmonary hypertension, or episodes of acute respiratory failure, or requires outpatient oxygen therapy.

60%

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 limitation.

30%

FEV-1 of 56 to 70 percent predicted, or FEV-1/FVC of 56 to 70 percent, or DLCO (SB) of 56 to 65 percent predicted.

10%

FEV-1 of 71 to 80 percent predicted, or FEV-1/FVC of 71 to 80 percent, or DLCO (SB) of 66 to 80 percent predicted.

What those terms mean

METs
Metabolic equivalents — a measure of how much physical activity your heart can handle before symptoms start. Lower METs = worse heart function = higher rating.
FEV-1
A breathing test number: how much air you can force out in one second, as a percentage of what's normal for you. Lower = worse.

Evidence that strengthens this claim

  • The diagnosis must be chronic — medical records showing a productive cough over an extended period (clinically, most of the days for months across multiple years) distinguish it from repeated acute bronchitis.
  • Get full pulmonary function testing (FEV-1, FEV-1/FVC, DLCO); the rating follows the objective numbers.
  • For PACT Act claims, confirm your service records establish qualifying locations and dates.

Rating rules to know

Under 38 CFR 4.96(a), chronic bronchitis cannot be combined with ratings for other respiratory codes 6600-6817 or 6822-6847 (including COPD, asthma, and sleep apnea). A single rating is assigned under the predominant disability.

Related diagnostic codes

DC 6604 Chronic obstructive pulmonary disease (COPD)DC 6603 Pulmonary emphysema

More respiratory conditions

DC 6847Respiratory

Sleep Apnea (Obstructive, Central, or Mixed)

Sleep apnea is a disorder where breathing repeatedly stops during sleep. VA rates it on how it is treated and how severe the effects are, from documented-but-asymptomatic up to chronic respiratory failure.

Rated up to 100%

DC 6602RespiratoryPresumptive

Asthma (Bronchial Asthma)

Asthma is a chronic airway disease causing wheezing, coughing, and shortness of breath. VA rates it on pulmonary function test (PFT) results or on how much medication and medical care it requires, whichever applies.

Rated up to 100%

DC 6522RespiratoryPresumptive

Allergic Rhinitis

Allergic rhinitis is chronic nasal inflammation causing congestion, runny nose, and sneezing. VA rates it on whether nasal polyps are present and how blocked the nasal passages are, with a maximum of 30 percent.

Rated up to 30%

DC 6510RespiratoryPresumptive

Chronic Sinusitis

Chronic sinusitis is long-term inflammation and infection of the sinus cavities causing headaches, facial pain, and discharge. VA rates all forms on one shared formula based on how many sinusitis episodes you have per year and how severe they are.

Rated up to 50%

DC 6604RespiratoryPresumptive

Chronic Obstructive Pulmonary Disease (COPD)

COPD is a progressive lung disease that obstructs airflow and makes breathing difficult. VA rates it almost entirely on objective pulmonary function test results, with higher ratings for oxygen therapy or heart complications.

Rated up to 100%

DC 6502Respiratory

Deviated Nasal Septum (Traumatic)

A deviated septum is a displacement of the wall between the nostrils that blocks airflow. VA rates it under a single 10 percent tier, and only when the deviation is traumatic (caused by injury).

Rated up to 10%

Disclaimer: Valor Rating is not affiliated with the U.S. Department of Veterans Affairs. This content is for educational purposes only and does not constitute legal or medical advice. Always review your documents carefully before submitting to the VA. For official guidance, consult an accredited VSO, claims agent, or attorney.