Nexus Letter for Hypertension
For herbicide-exposed veterans hypertension may be presumptive — and a nexus letter may not be needed at all.
Hypertension sits in an unusual spot: the right move depends entirely on where and when you served. Veterans with qualifying herbicide (Agent Orange) exposure may not need a nexus letter for it at all, because the PACT Act added hypertension to the Agent Orange presumptive list in 2022. Veterans without that exposure are usually building either a direct claim on documented in-service readings or a secondary claim under 38 CFR § 3.310. Establishing which lane you are in before anyone writes a letter is the single highest-value step, because a presumptive claim and a nexus claim ask a doctor for completely different things.
Check this first: is hypertension presumptive for you?
If a presumption applies to your service, VA connects the condition without requiring you to prove the medical link — which can mean you do not need a nexus letter at all. Presumptions turn on where and when you served, so read the qualifying service line before assuming one fits.
- Agent Orange — Vietnam & extended theaters
Applies to: Boots-on-ground or brown/blue-water Navy in Republic of Vietnam 1/9/1962 – 5/7/1975, or other covered exposure locations.
38 USC § 1116; 38 CFR § 3.309(e)
VA's published list →
Limits that change the answer
- !PACT Act — post-9/11 burn-pit / airborne hazard: Hypertension is NOT presumptive under this post-9/11 burn-pit list. VA proposed a rule in 2024 to add it but it has not been finalized — do not cite PACT post-9/11 as the basis for an HTN claim.
- !PACT Act — Gulf War era SW Asia (1990–2001): Hypertension is NOT presumptive under this list.
- !Agent Orange — Vietnam & extended theaters: PACT Act expanded Agent Orange presumptives in Oct 2022 (HTN, hypothyroid, MGUS, bladder, parkinsonism).
- !Agent Orange — Vietnam & extended theaters: Brown-water and blue-water Navy eligibility differs — blue-water limited to 12 nautical mile territorial seas of the Republic of Vietnam per PACT Act.
Presumptive lists last reviewed 2026-04-19. Rendered from our tracked copy of VA's published lists, not retyped per page.
What every nexus letter must do
These four apply to every condition. A letter missing any one of them is the most common reason an otherwise good claim is denied.
- 1.A statement that your records were reviewed
VA weighs a medical opinion partly on whether the clinician actually had the evidence in front of them. A letter that does not say what was reviewed reads as an opinion formed without the file.
- 2.A current diagnosis
Service connection requires a present disability. The letter should state the diagnosis plainly rather than describing symptoms and leaving the conclusion implied.
- 3.The phrase "at least as likely as not"
This is VA's evidentiary standard — a 50 percent or greater probability. Under 38 CFR § 3.102 the tie goes to the veteran, and this phrase is what places the opinion at or above that line. Softer wording ("possibly," "may be," "could be," "cannot rule out") sits below the standard and is a leading cause of denial.
- 4.A stated medical rationale
The reasoning behind the conclusion, not just the conclusion. An opinion that gives an answer without explaining the basis for it carries little weight, no matter how well-credentialed the signer.
What hypertension letters must establish on top of that
- ›Which lane the claim is in — presumptive, direct, or secondary. A letter written for the wrong lane reads as a doctor who does not know the pathway.
- ›For a direct claim: the in-service blood-pressure readings by date, and why those readings represent the onset of a chronic disease rather than isolated situational elevation.
- ›For a secondary claim: the named service-connected condition and the physiological mechanism connecting it to sustained blood-pressure elevation.
Most common secondary pathways for hypertension
Under 38 CFR § 3.310, a condition caused or permanently worsened by an already-service-connected condition is itself service-connected. These are the primaries hypertension is most often claimed behind:
- ›PTSD, depression, or anxiety
- ›Sleep apnea
- ›Diabetes mellitus type 2
- ›Chronic kidney disease
The primary has to already be service-connected. If it is not, that claim comes first.
What gets hypertension letters discounted
- !Hypertension is an Agent Orange presumptive, NOT a post-9/11 burn-pit presumptive. Citing the burn-pit framework for a hypertension claim is a common and costly mix-up — VA proposed adding it to the burn-pit list but has not finalized that rule.
- !VA rates hypertension on predominant readings over time, so a single high reading in the records rarely carries a claim. The letter should reference the pattern, not one number.
- !If you are already on continuous medication for blood pressure, that belongs in the letter — medication history is part of how this condition is evaluated.
Draft the hypertension letter — free
Our drafter builds the VA-compliant framing and language for your doctor to review, edit, and sign. It is free, there is no account and no card, and the medical judgment stays with your physician — we write the structure, not the opinion.
Draft my hypertension nexus letter →Opens the drafter with hypertension and the secondary theory already filled in. You can change both.
Also useful for hypertension claims
- Hypertension rating criteria — what each percentage requires, and what it pays.
- Real Board grants for hypertension — verbatim language from decisions that were actually granted.
- What nexus letters cost — what you are paying for, and when you do not need to pay at all.
- C&P exam prep — the questions the examiner will ask and how to answer them.
Nexus letters for other conditions
NexusVetClaims provides software, not legal representation or medical advice. We are not VA-accredited and never take a percentage of your benefits. A nexus letter is a medical opinion — only a qualified clinician who has evaluated you can provide one. Regulations cited here are current as published on eCFR; verify anything load-bearing against the source before you file.