COPD VA Rating and Diagnostic Code 6604 Criteria

Detailed breakdown of each COPD rating tier

Every criterion within a rating tier under Diagnostic Code 6604 is joined by “or.” When different PFT metrics fall into different tiers, the VA follows 38 CFR 4.96(d).

0 percent noncompensable rating

Under 38 CFR 4.31, the VA assigns 0% when a veteran has service-connected COPD, chronic bronchitis, or emphysema, but FEV-1, FEV-1/FVC, and DLCO (SB) all exceed 80%. A 0% rating establishes service connection, provides no-cost VA care and inhalers, and allows an increased rating claim if lung function declines.

10 percent disability rating

A 10% evaluation reflects mild obstructive airflow limitation or mild reduction in gas transfer:

• FEV-1 of 71% to 80% predicted: Volume of air forcibly exhaled in the first second is mildly reduced compared to reference values.
• FEV-1/FVC ratio of 71% to 80%: Proportion of total Forced Vital Capacity expelled in the first second is 71% to 80%.
• DLCO (SB) of 66% to 80% predicted: Single-breath carbon monoxide diffusion capacity shows mild impairment in alveolar gas transfer. Note that the 10% DLCO tier extends down to 66% predicted, whereas FEV-1 and FEV-1/FVC extend down to 71%.

30 percent disability rating

A 30% evaluation applies to moderate airway obstruction or gas-exchange impairment:

• FEV-1 of 56% to 70% predicted.
• FEV-1/FVC ratio of 56% to 70%.
• DLCO (SB) of 56% to 65% predicted.

Because Diagnostic Code 6604 does not include inhaler criteria, a veteran diagnosed solely with COPD who uses daily maintenance inhalers—but whose FEV-1 and FEV-1/FVC are 75% and DLCO (SB) is 72%—is rated at 10% under DC 6604 rather than 30%.

60 percent disability rating

A 60% evaluation covers moderately severe airflow obstruction, impaired gas diffusion, or documented exercise intolerance:

• FEV-1 of 40% to 55% predicted.
• FEV-1/FVC ratio of 40% to 55%.
• DLCO (SB) of 40% to 55% predicted.
• Maximum oxygen consumption of 15 to 20 ml/kg/min (with cardiorespiratory limit): Measured during cardiopulmonary exercise testing (VO2 max).

100 percent disability rating

Any one of nine criteria warrants a 100% rating under Diagnostic Code 6604:

1. FEV-1 less than 40% predicted (39% or lower).
2. FEV-1/FVC ratio less than 40% (39% or lower).
3. DLCO (SB) less than 40% predicted (39% or lower).
4. Maximum exercise capacity less than 15 ml/kg/min oxygen consumption with cardiac or respiratory limitation.
5. Cor pulmonale (right heart failure): Right ventricular enlargement and failure caused by elevated pulmonary arterial pressure.
6. Right ventricular hypertrophy: Thickening of the right ventricular wall secondary to chronic pulmonary resistance.
7. Pulmonary hypertension: Elevated pulmonary arterial blood pressure shown by echocardiogram (Echo) or cardiac catheterization.
8. Episode(s) of acute respiratory failure: Documented failure to maintain oxygen uptake or carbon dioxide clearance.
9. Requires outpatient oxygen therapy: Prescribed supplemental oxygen outside a hospital setting (continuous, nocturnal, or exertional).

How 38 CFR 4.96(d) governs Pulmonary Function Tests (PFTs)

When evaluating COPD (DC 6604), chronic bronchitis (DC 6600), or emphysema (DC 6603), VA examiners and raters apply the seven rules in 38 CFR 4.96(d):

• When PFTs are required and the four exceptions (38 CFR 4.96(d)(1)): PFTs are required to evaluate DC 6604 except: (i) when maximum exercise capacity results of record are 20 ml/kg/min or less; (ii) when pulmonary hypertension (by Echo or cardiac catheterization), cor pulmonale, or right ventricular hypertrophy is diagnosed; (iii) after one or more episodes of acute respiratory failure; or (iv) when outpatient oxygen therapy is required.
• When DLCO (SB) is not of record (38 CFR 4.96(d)(2)): If DLCO (SB) is not of record, the VA evaluates on alternative criteria if the examiner states why the DLCO test would not be useful or valid.
• When PFTs conflict with clinical findings (38 CFR 4.96(d)(3)): The VA evaluates based on PFTs unless the examiner states why they are not a valid indication of respiratory impairment.
• Pre- vs. post-bronchodilator rules (38 CFR 4.96(d)(4)–(5)): Post-bronchodilator studies are required unless pre-bronchodilator PFTs are normal or the examiner states why they should not be done. Raters use post-bronchodilator results unless poorer than pre-bronchodilator results, in which case pre-bronchodilator values control.
• Disparity between PFT metrics (38 CFR 4.96(d)(6)): When FEV-1, FVC, FEV-1/FVC, or DLCO (SB) correspond to different tiers, the VA uses the test result that the examiner states most accurately reflects the level of disability.
• The 100% FEV-1 and FVC rule (38 CFR 4.96(d)(7)): If both FEV-1 and FVC exceed 100% predicted, no compensable rating is assigned based solely on a reduced FEV-1/FVC ratio.

Rule against combining respiratory ratings (38 CFR 4.96(a))

Under 38 CFR 4.96(a), the VA prohibits combining ratings across most lower respiratory codes:

• Cannot be combined separately with COPD (DC 6604): Ratings under Diagnostic Codes 6600 through 6817 and 6822 through 6847 (and DCs 6819–6820 with lung or pleural involvement) cannot be combined—including chronic bronchitis (DC 6600), bronchiectasis (DC 6601), asthma (DC 6602), emphysema (DC 6603), interstitial/restrictive lung diseases (DCs 6825–6845), and sleep apnea (DC 6847). The VA assigns a single rating for the predominant disability, elevated to the next higher tier if overall severity warrants it.
• Can be combined separately from COPD: Upper-respiratory conditions under Diagnostic Codes 6502 through 6524 fall outside 38 CFR 4.96(a), allowing separate ratings for chronic sinusitis (DCs 6510–6514) and allergic or vasomotor rhinitis (DC 6522).

Status of the 2022 proposed respiratory rating schedule changes

On February 15, 2022, the VA published a Proposed Rule (87 FR 8474, Docket VA-2022-VBA-0009, RIN 2900-AQ72) proposing to evaluate DCs 6600, 6603, and 6604 under a General Rating Formula for Respiratory Conditions (shifting the 100%/60% FEV-1 cutoff from 40% to 45% predicted, adding FVC and MET criteria, and allowing combination with sleep apnea under DC 6847).

As of today, this 2022 proposed rule is not finalized. All COPD claims are decided under current 38 CFR 4.96 and 4.97, and established ratings are protected against schedule-change reductions under 38 CFR 3.951(a).

Service connection for COPD: PACT Act, direct, and secondary pathways

1. Presumptive service connection under the PACT Act of 2022

The PACT Act of 2022 (Public Law 117-168, 38 U.S.C. 1120) designated COPD, chronic bronchitis, and emphysema as presumptive conditions for burn pit and toxic exposure, as listed on the VA PACT Act resource page. Veterans with a confirmed diagnosis need no nexus opinion if they served on active duty:

• On or after August 2, 1990: Iraq, Kuwait, Saudi Arabia, the neutral zone between Iraq and Saudi Arabia, Bahrain, Qatar, the UAE, Oman, Somalia, the Gulf of Aden, the Gulf of Oman, the Persian Gulf, the Arabian Sea, the Red Sea, or the airspace above them.
• On or after September 11, 2001: Afghanistan, Syria, Djibouti, Uzbekistan, Egypt, Jordan, Lebanon, or Yemen, or the airspace above them.

2. Direct, aggravation, and secondary service connection

• Direct service connection (38 CFR 3.303): Requires a current COPD diagnosis, documented in-service inhalational exposure (asbestos, welding fumes, diesel or JP-8 exhaust, silica dust, or solvents) or respiratory illness, and a medical nexus. (Under 38 U.S.C. 1103 and 38 CFR 3.300, service connection cannot be based on personal in-service tobacco use, though smoking does not bar a PACT Act or occupational-exposure claim.)
• Aggravation (38 CFR 3.306) and Secondary (38 CFR 3.310): Applies when a preexisting lung condition permanently worsened in service, or when COPD is caused or aggravated by another service-connected disability.

How the C&P exam and DBQ measure COPD

During a C&P exam, the clinician completes the Respiratory Conditions (other than tuberculosis and sleep apnea) Disability Benefits Questionnaire (DBQ), verified on the VA Public DBQs page:

1. Complications and oxygen: Records cor pulmonale, right ventricular hypertrophy, pulmonary hypertension (by Echo or cardiac catheterization), acute respiratory failure, or outpatient oxygen therapy (each waives PFTs under 38 CFR 4.96(d)(1) and supports 100%).
2. Spirometry and DLCO (SB): Records pre- and post-bronchodilator FVC, FEV-1 (% predicted), FEV-1/FVC (%), and DLCO (SB) (% predicted), or states why DLCO or post-bronchodilator testing was omitted.
3. Most representative metric: Under 38 CFR 4.96(d)(6), specifies which PFT metric most accurately reflects disability severity when scores span multiple tiers.

Secondary conditions, combined ratings, and accredited help

Under 38 CFR 3.310(a), conditions proximately caused or aggravated by service-connected COPD may qualify for secondary service connection with a medical nexus:

• Cardiovascular conditions (38 CFR 4.104): While cor pulmonale, right ventricular hypertrophy, and pulmonary hypertension warrant 100% directly under DC 6604, chronic hypoxia may cause or aggravate hypertension (DC 7101) or coronary artery disease (DC 7005).
• GERD (DC 7206), osteoporosis (DC 5013), and mood disorders (38 CFR 4.130): Chronic coughing and bronchodilators may aggravate acid reflux; systemic steroids may cause bone loss or steroid-induced diabetes (DC 7913); and chronic dyspnea may cause secondary depressive or anxiety disorders.

COPD ratings combine with non-prohibited ratings under 38 CFR 4.25. Model your overall rating with our VA combined rating calculator and estimate past-due pay with our VA back pay calculator.

Veterans Service Organizations (VSOs) such as the DAV, VFW, and American Legion provide free representation, and VA-accredited claims agents or attorneys handle appeals. No representative can guarantee an outcome; verify credentials via the VA Office of General Counsel Accreditation Search.