Is a DBQ the same as a nexus letter?

No. A nexus letter is an opinion on whether a condition is connected to service. A DBQ records the symptoms and measurements VA uses to set the rating.

Can a DBQ include a nexus opinion?

VA lists its Medical Opinion DBQ as not available for public use, so a private service-connection opinion is written as a nexus letter.

Do I need a DBQ if VA is scheduling a C&P exam?

Not always. The VA exam produces its own findings. A private DBQ helps most when your records already document findings the exam may not capture.

DBQ vs nexus letter: which does your VA claim need?

Updated September 28, 2026

A nexus letter and a DBQ answer different questions. A nexus letter is a clinician's opinion on whether your condition is connected to your service, which decides service connection. A DBQ (Disability Benefits Questionnaire) is VA's standardized form for recording the symptoms and measurements of a condition, which decides the rating percentage. Many claims need a nexus opinion first; a DBQ matters once the question is how severe the condition is.

Side by side

Question answered: a nexus letter answers "is it connected to service?"; a DBQ answers "how severe is it?"
Format: a nexus letter is a written opinion with a rationale; a DBQ is VA's own checkbox-and-measurement form.
What it drives: a nexus letter drives service connection (38 CFR 3.303, and 3.310 for secondary conditions); a DBQ drives the rating percentage under the rating schedule.
When it matters most: a nexus letter when VA says there is no link; a DBQ when you are service connected but rated too low, or filing for an increase.

When you need both

A new claim for a condition VA has not connected yet can need both: the opinion to connect it and the measurements to rate it. VA usually schedules its own exam for the rating, but a private DBQ can put accurate findings in the file from the start.

Some DBQs are VA-only

VA publishes most DBQs for any clinician to use, but it lists some as not available for public use because of regulatory limits or specialized training. That VA-only list includes the Medical Opinion DBQ, the initial PTSD exam, hearing loss and tinnitus, and the initial and review evaluations of traumatic brain injury. A private opinion on service connection is therefore written as a nexus letter, not on a DBQ form.

A DBQ from records only

A DBQ asks for specific findings: range of motion, test results, frequency of episodes. Commander Health works from records only, so a DBQ ($200) is possible only when your records already hold what the form asks for. The free screen checks that before you pay. Nexus letters are $500, or $550 for both together.

Frequently asked questions

Is a DBQ the same as a nexus letter?: No. A nexus letter is an opinion on whether a condition is connected to service. A DBQ records the symptoms and measurements VA uses to set the rating.
Can a DBQ include a nexus opinion?: VA lists its Medical Opinion DBQ as not available for public use, so a private service-connection opinion is written as a nexus letter.
Do I need a DBQ if VA is scheduling a C&P exam?: Not always. The VA exam produces its own findings. A private DBQ helps most when your records already document findings the exam may not capture.