Nexus Letter for Depression Secondary to Hearing Loss

VA's Manual Has No Shortcut for This Pairing

VA raters work from the M21-1 Adjudication Procedures Manual as well as the regulations. For hearing, the governing article is Part V, Subpart iii, Chapter 2, Section B, Conditions of the Auditory System, which we read in full on September 13, 2026. Across its 43,754 characters of text, the strings depress, anxiet, mental, psychiatr, 3.310, 4.130, 4.14 and pyramid each appear zero times. The hearing chapter says nothing at all about a psychiatric condition that follows hearing loss.

The manual's mental disorders chapter is silent from the other side. Part V, Subpart iii, Chapter 13 contains no block on service connecting a mental disorder secondary to a physical condition, and the string 3.310 does not appear in it. So the secondary-claim rules that apply are the general ones in Part V, Subpart ii, Chapter 2, Section D, which the aggravation section below quotes.

That silence is a real difference from the claim one link away. The same auditory chapter has a block on interpreting medical opinions involving tinnitus. Where an examiner states that the tinnitus is a symptom of the hearing loss, and the hearing loss is determined to be service connected, it directs the rater to evaluate tinnitus separately under 38 CFR 4.87, DC 6260 and to establish service connection for tinnitus on a direct, not secondary, basis. Depression gets no equivalent instruction anywhere in the chapter. This is a genuine 38 CFR 3.310 claim, and the relationship between the two conditions has to be carried by evidence.

What gets VA to look, and what gets VA to grant

Those are two different bars, and the manual keeps them apart. Part IV, Subpart i, Chapter 1, Section B, Block 1.e says that medical expertise is ultimately required to establish entitlement to SC on a secondary basis, but the threshold for ordering an examination is low. The kinds of evidence it lists as giving a claim credibility for that purpose include the veteran's own lay statement describing the symptoms and how they relate to the primary disability, and a medical treatise establishing a known relationship between the two.

The same block sets a floor under that low threshold: a generalized statement merely asserting a conclusion that a condition is secondary to an SC disability is not sufficient to satisfy the Element 3 standard for requesting an examination. A research citation can help get an examination ordered, but the manual does not treat it as the nexus itself.

Two Rating Instruments, and the Rule Against Counting the Same Thing Twice

Once service connection is granted, each condition is rated on its own schedule. The schedules measure different things, which is also where the one real drafting risk on this claim sits.

The rule against counting twice

38 CFR 4.14 opens: "The evaluation of the same disability under various diagnoses is to be avoided." It closes: "Both the use of manifestations not resulting from service-connected disease or injury in establishing the service-connected evaluation, and the evaluation of the same manifestation under different diagnoses are to be avoided." The test is sameness of the manifestation, not the fact that two diagnostic codes sit on one rating sheet.

VA's manual states the practical version in its mental disorders chapter, at Part V, Subpart iii, Chapter 13, Block 1.h: "Avoid assigning separate evaluations for SC disabilities based on the same manifestations as this constitutes pyramiding. To warrant separate evaluations, symptoms considered must be distinct and not overlap." Its worked example is a veteran service connected for PTSD, with anxiety considered in that evaluation, who is later granted fibromyalgia on a record where anxiety is also a manifestation. The result the manual gives: "Fibromyalgia will be SC and rated separately from PTSD. However, anxiety may only be considered in determining the rating to be assigned for PTSD or fibromyalgia."

Part V, Subpart ii, Chapter 3, Section D, Block 2.b of the manual records the court standard: "Separate evaluations are warranted where none of the symptomatology for any one condition duplicates or overlaps another", citing Esteban v. Brown, 6 Vet.App. 259 (1994).

Where the two vocabularies meet

None of the manual's examples involves hearing, so applying the rule to this pairing is our reading, not an instruction the manual gives. This matters wherever Table VI governs, which is the usual case, because that is where the hearing rating is built partly from how well a veteran understands speech, and the mental formula uses words that can sound like the same thing.

The phrase with the highest risk of being read as overlapping sits in the 50 percent row: "difficulty in understanding complex commands". A veteran with poor speech discrimination may miss spoken instructions for purely auditory reasons, and the speech discrimination score already measures exactly that, where the rating ran through Table VI. The only use of the word communication in the formula is in the 100 percent row, "gross impairment in thought processes or communication", which in context describes a disorder of thought. Where the formula says speech, as in "circumstantial, circumlocutory, or stereotyped speech", it means the veteran's own speech, not what he can hear. And the 30 percent row describes a person "with routine behavior, self-care, and conversation normal", where a hearing-impaired veteran's conversation can be affected for reasons unrelated to mood.

Sleep follows the same logic. Part V, Subpart iii, Chapter 13, Block 1.k of the manual says that where insomnia is a symptom of another service-connected disability, a separate SC evaluation on a secondary basis is not warranted for insomnia, and the insomnia symptoms should be included in the evaluation assigned under the DC for the primary SC disability. Sleep problems that are part of a service-connected depression belong in the depression evaluation, not in a separate claim.

The full General Rating Formula, row by row, is on our depression condition page.

If the Depression Came First: The Aggravation Route

Where depression predates the hearing loss, the theory that fits is aggravation: that the service-connected hearing loss made an existing condition worse.

What the regulation says

38 CFR 3.310(b) provides: "Any increase in severity of a nonservice-connected disease or injury that is proximately due to or the result of a service-connected disease or injury, and not due to the natural progress of the nonservice-connected disease, will be service connected." VA will not concede aggravation unless the baseline level of severity is established by medical evidence created before the onset of aggravation, or by the earliest medical evidence created between that onset and the medical evidence establishing the current level. The text then has the rating activity deduct both the baseline and any increase due to natural progress from the current level.

What VA's manual now applies, after Spicer

The manual has moved since, and the two should be cited separately. Part V, Subpart ii, Chapter 2, Section D was updated on May 1, 2026 to incorporate Spicer v. McDonough, 61 F.4th 1360 (Fed. Cir. 2023). It records that VA "will apply the broader but-for standard and will no longer consider natural progress of the NSC disability when deciding a claim based on aggravation of an NSC disability by an SC disability." It also states that permanent worsening of an NSC disability by an SC disability is not required to establish SC on the basis of aggravation under 38 CFR 3.310(b).

Under the manual there is one deduction, not two. Block 1.g directs the rater to deduct the baseline level of severity of the NSC disability from the current level to calculate the appropriate evaluation to assign. And Block 1.h covers the case where the worsening is real but the baseline and current levels fall at the same rating level: VA is to grant service connection and assign a noncompensable evaluation.

The baseline is the part that decides these claims

Block 1.c of the manual allows the baseline to rest on medical evidence created before the onset of aggravation, and on any other credible evidence, including lay evidence, that supports establishment of the baseline, with a note that lay evidence on its own may not be sufficient. The regulation's text is narrower and names only the two medical-evidence windows above.

Block 1.f is the hard edge. It states that if no baseline can be established, no aggravation can be demonstrated, and that such a claim must be denied, though only after VA's duty to assist has been fulfilled. It then adds: "Do not assume a baseline of 0 percent when a baseline cannot be established by the available evidence." That sentence cuts against a veteran who hopes VA will treat an undocumented earlier period as symptom-free. The practical answer is to find the earlier mental health records, if they exist, before the claim is filed.

Why the opinion must answer aggravation even when causation is the theory

Two of the Board decisions set out below pull in opposite directions on this. In A26001432 a VA examination was found inadequate for skipping the aggravation question, and the veteran won on private evidence. In A24085323 the Board acknowledged the rule that an opinion saying a condition is not caused by a service-connected disability does not address aggravation, but held that no separate aggravation opinion was needed where nothing in the record suggested the hearing loss had contributed. The difference was the record. An opinion that answers causation and aggravation separately, in terms, leaves nothing for that argument to turn on.

What the Board of Veterans' Appeals Has Decided

We read fifteen distinct Board decisions on a psychiatric disorder claimed as secondary to service-connected hearing loss. Fourteen are merits decisions and we read each ORDER block; the fifteenth is a remand that decided nothing. The nine below show the range, denials included. The search was not exhaustive, so nothing here is a grant rate or a trend.

Board decisions are not precedent. Under 38 CFR 20.1303, previously issued Board decisions will be considered binding only with regard to the specific case decided, and each recent decision states that it is not precedential and does not establish VA policies or interpretations of general applicability.

Three cautions. Every grant above granted service connection only, and none assigned a psychiatric percentage. The legacy decisions cited on this page (2009 to 2015) predate Lynch v. McDonough and Spicer v. McDonough, so their framing is dated. And A25043990 was also published as A25043819; it is one decision, not two.

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