VA Depression Claims: DC 9434 Ratings and Service Connection

Depression is one of the most common mental-health conditions the VA rates, and it is claimed under two diagnostic codes: diagnostic code 9434 for major depressive disorder and DC 9435 for unspecified depressive disorder. Both are rated on the exact same scale, the General Rating Formula for Mental Disorders at 38 CFR 4.130, the same 0/10/30/50/70/100 ladder used for PTSD and anxiety. The rating turns on how much the condition impairs your work and social life, not on a diagnosis label. This guide explains the rating ladder in plain language, the rule that gives a veteran one combined mental rating rather than a separate rating for each diagnosis, and the service-connection paths the Board's published decisions show are strongest, including depression caused by an already service-connected physical condition such as chronic pain, tinnitus, sleep apnea, or TBI.

What the VA Counts as Depression (major depressive disorder)

For VA purposes, depression is a diagnosed mental-health condition under 38 CFR 4.130. The diagnosis must conform to the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), which is required by 38 CFR 4.125. A diagnosis from a qualified provider is the threshold, feeling low or stressed is not enough on its own. Depression is claimed under two closely related codes, both rated on the same formula.

DC 9434, Major depressive disorder

The DSM-5 diagnosis of major depressive disorder (often called MDD or clinical depression). This is the most specific and most commonly claimed depression code.

DC 9435, Unspecified depressive disorder

The DSM-5 successor to the older "depressive disorder not otherwise specified" label. Used when a provider documents a depressive disorder that does not fully meet the criteria for a more specific diagnosis. It is rated on the identical 4.130 scale as 9434.

Both codes use the same rating ladder. Whether your records say major depressive disorder (9434) or unspecified depressive disorder (9435), the VA rates the condition under the single General Rating Formula for Mental Disorders. The percentage depends on the level of occupational and social impairment your symptoms cause, not on which depression label appears in your file.
A DSM-5 diagnosis is the gate. In published Board decisions, "no current diagnosis" is the second-most-common reason depression claims are denied (121 of 881 classified denials for DC 9434, 925 of 3,859 for DC 9435, per published BVA decisions). 38 CFR 4.125 requires the diagnosis to conform to the DSM-5, so a confirmed clinical diagnosis is foundational before the rating question is even reached.

How 38 CFR 4.130 and the One-Rating Rule Work

Depression does not have its own unique set of symptoms in the rating schedule. Instead, every mental-health condition rated under diagnostic codes 9201 through 9440, including both depression codes, is evaluated under one shared scale: the General Rating Formula for Mental Disorders at 38 CFR 4.130. Note 2 to 4.130 states this directly. That is the same formula that rates PTSD (DC 9411) and anxiety. The rating measures one thing: how much the condition impairs your occupational and social functioning, scored at 0, 10, 30, 50, 70, or 100 percent.

The single-rating rule for multiple mental diagnoses

Many veterans carry more than one mental-health diagnosis at once, for example depression plus PTSD, or depression plus anxiety. The VA does not stack these into separate percentages. Under 38 CFR 4.130 and the anti-pyramiding rule at 38 CFR 4.14, the VA assigns one combined evaluation covering all of a veteran's service-connected mental-health conditions together. The Board applies what is often called the Clemons and Mittleider principle: where symptoms overlap and cannot be cleanly attributed to one specific diagnosis, those symptoms are attributed to the service-connected disorder rather than split apart. The practical effect is that a veteran with depression and PTSD receives a single mental-health rating reflecting the total impairment, not a depression rating added to a PTSD rating.

One mental rating, not several. This is frequently misunderstood. Adding a second mental-health diagnosis does not double the rating. What can raise the overall percentage is evidence that the combined mental impairment is more severe, that is, that it reaches a higher tier on the 4.130 ladder, not the number of diagnostic labels in the file. The depth on how 4.130 scores each tier lives on the Mental Health Rating Formula page.

A snapshot exam is not the whole picture

The regulation directs raters to evaluate the condition based on all the evidence of the frequency, severity, and duration of symptoms over time, not on a single day's presentation. A thin treatment record or one good day at a Compensation and Pension (C&P) exam can understate the true level of occupational and social impairment. Ongoing treatment notes and medication history fill in the longitudinal picture the formula calls for.

DC 9434 Rating Levels

Both DC 9434 (major depressive disorder) and DC 9435 (unspecified depressive disorder) are rated on the General Rating Formula for Mental Disorders below, verbatim from 38 CFR 4.130. Each tier describes a level of occupational and social impairment, followed by example symptoms. The examples are illustrations, not a checklist that must be matched item for item.

100%Total occupational and social impairment

Total occupational and social impairment, due to such symptoms as: gross impairment in thought processes or communication; persistent delusions or hallucinations; grossly inappropriate behavior; persistent danger of hurting self or others; intermittent inability to perform activities of daily living (including maintenance of minimal personal hygiene); disorientation to time or place; memory loss for names of close relatives, own occupation, or own name.

70%Deficiencies in most areas

Occupational and social impairment, with deficiencies in most areas, such as work, school, family relations, judgment, thinking, or mood, due to such symptoms as: suicidal ideation; obsessional rituals which interfere with routine activities; speech intermittently illogical, obscure, or irrelevant; near-continuous panic or depression affecting the ability to function independently, appropriately and effectively; impaired impulse control (such as unprovoked irritability with periods of violence); spatial disorientation; neglect of personal appearance and hygiene; difficulty in adapting to stressful circumstances (including work or a worklike setting); inability to establish and maintain effective relationships.

50%Reduced reliability and productivity

Occupational and social impairment with reduced reliability and productivity due to such symptoms as: flattened affect; circumstantial, circumlocutory, or stereotyped speech; panic attacks more than once a week; difficulty in understanding complex commands; impairment of short- and long-term memory (e.g., retention of only highly learned material, forgetting to complete tasks); impaired judgment; impaired abstract thinking; disturbances of motivation and mood; difficulty in establishing and maintaining effective work and social relationships.

30%Occasional decrease in work efficiency

Occupational and social impairment with occasional decrease in work efficiency and intermittent periods of inability to perform occupational tasks (although generally functioning satisfactorily, with routine behavior, self-care, and conversation normal), due to such symptoms as: depressed mood, anxiety, suspiciousness, panic attacks (weekly or less often), chronic sleep impairment, mild memory loss (such as forgetting names, directions, recent events).

10%Mild or transient symptoms, or controlled by medication

Occupational and social impairment due to mild or transient symptoms which decrease work efficiency and ability to perform occupational tasks only during periods of significant stress, or symptoms controlled by continuous medication.

0%Formally diagnosed, symptoms not disabling

A mental condition has been formally diagnosed, but symptoms are not severe enough either to interfere with occupational and social functioning or to require continuous medication.

Go deeper: open the full DC 9434 breakdown
  • What the VA measures at your C&P mental exam
  • Evidence that has won at the Board
  • Inside the rater's playbook: grant, denial, and remand rates
  • Secondary condition map
See the full DC 9434 breakdown →

The same six tiers apply to DC 9435 (unspecified depressive disorder). Where a veteran has more than one service-connected mental-health condition, a single percentage from this ladder covers all of them combined, as explained in the one-rating section above.

The 10% medication tier is easy to overlook. A diagnosed depressive disorder whose symptoms are controlled by continuous medication is described by the 10% tier. A formally diagnosed condition with symptoms that neither interfere with functioning nor require continuous medication sits at 0%. The line between them turns on whether continuous medication is required and whether functioning is affected.

Notes from the regulation:

  • Note 2: Ratings under diagnostic codes 9201 to 9440, which include both 9434 and 9435, are evaluated using the General Rating Formula for Mental Disorders. Ratings under diagnostic codes 9520 and 9521 are evaluated using the General Rating Formula for Eating Disorders.
  • DSM-5 basis: The nomenclature in this part of the rating schedule is based on the DSM-5, and the general rating formula for mental disorders in 4.130 is applied to it.

For a tier-by-tier walkthrough of how raters apply each level, the Mental Health Rating Formula page covers the 4.130 ladder in depth for every mental condition.

How Depression (major depressive disorder) Gets Service Connected

Direct service connection

Direct service connection requires a current DSM-5 depression diagnosis, an in-service event or onset, and a medical nexus linking the two. In the Board's published decisions, depression is among the more frequently granted conditions on a direct basis, and a private nexus opinion in the file goes with a markedly higher grant rate, shown below. The development manual for these claims is M21-1, Part V, Subpart iii, Chapter 13 (Mental Disorders).

Private nexus opinion and the direct-claim grant rate

DC 9434, with private nexusBVA grant rate 91.9%
n = 1,156
DC 9434, no private nexusBVA grant rate 65.4%
n = 2,144
DC 9435, with private nexusBVA grant rate 82.8%
n = 1,176
DC 9435, no private nexusBVA grant rate 40.3%
n = 3,767

No toxic-exposure presumptive

Depression has no presumptive pathway. There is no Agent Orange, no PACT Act or burn-pit, and no Camp Lejeune presumption that covers depression. It must be established on a direct or secondary basis. A depression diagnosis by itself, even with qualifying exposure history, does not trigger a presumption. The realistic routes are direct service connection and secondary service connection, described here.

Secondary to a service-connected physical condition

The strongest theory in the published data is depression caused or aggravated by an already service-connected condition, under 38 CFR 3.310. Chronic pain, tinnitus, sleep apnea, TBI, and migraines are common primaries. The Board's decisions show high grant rates for this direction: tinnitus to major depressive disorder was granted in approximately 77% of appeals (published BVA decisions, n = 83), and a service-connected lumbar or cervical strain to major depressive disorder was granted in approximately 79% of appeals (published BVA decisions, n = 50). A secondary claim requires a current depression diagnosis and a medical opinion stating that the service-connected condition caused or aggravated the depression. See secondary conditions and nexus letters.

Secondary to PTSD or another mental condition

Depression is also commonly claimed secondary to PTSD. In published decisions, PTSD to major depressive disorder was granted in approximately 77% of appeals (published BVA decisions, n = 68). Note, however, the one-rating rule above: where PTSD and depression are both service connected, the VA assigns a single combined mental-health evaluation under 4.130 rather than separate percentages. The PTSD claims guide and the anxiety claims guide cover those conditions in depth.

When the stressor is military sexual trauma (MST)

Where the in-service event behind the depression is military sexual trauma, a relaxed-evidence development pathway applies. The VA does not require proof that the MST was reported at the time and may accept behavioral "markers" (such as transfer requests, performance drops, or new mental-health treatment) as evidence the event occurred. MST is not a presumption. It is a personal-trauma development pathway that can support depression as well as PTSD. The VA.gov page "Military sexual trauma and disability compensation" lists major depressive disorder among the conditions that can be service connected when caused by MST. The controlling development guidance is M21-1, Part VIII, Subpart iv, Chapter 1, Sections B and D.

Common Secondary Conditions

Depression sits at the center of two distinct secondary relationships. It can be the downstream condition (something else causes the depression), and it can be the upstream condition (the depression, or the medication used to treat it, causes something else). The Board's published decisions show grant rates for both directions.

Conditions that cause depression (depression as the secondary)

These are claims where depression was argued as secondary to an already service-connected condition. Each bar is the published BVA grant rate to DC 9434 (major depressive disorder), with the number of decisions below it:

Lumbar or cervical strainBVA grant rate 79%
n = 50
TinnitusBVA grant rate 77%
n = 83
PTSDBVA grant rate 77%
n = 68

Conditions depression causes (depression as the primary)

Depression itself drives downstream secondaries, often through symptom overlap or medication side effects. Each bar is the published BVA grant rate for a condition claimed secondary to major depressive disorder:

Sleep apneaBVA grant rate 79%
n = 417
Erectile dysfunctionBVA grant rate 79%
n = 59
HypertensionBVA grant rate 46%
n = 123

For DC 9435 (unspecified depressive disorder), the pattern is similar: sleep apnea secondary to 9435 was granted in approximately 73% of appeals (n = 349), and migraine secondary to 9435 in approximately 80% of appeals (n = 42, small sample), per published BVA decisions. These figures describe what the Board's published decisions show across many veterans. They are not a prediction about any one claim. More on framing both directions is on the secondary conditions page.

Pyramiding and Rating Separately

The VA's pyramiding rule at 38 CFR 4.14 prevents paying twice for the same symptoms. For mental health this rule has a specific consequence: a veteran does not receive a separate rating for each mental-health diagnosis. Depression, PTSD, anxiety, and any other condition rated under 38 CFR 4.130 are combined into one mental-health evaluation. Because all of these conditions are scored on the same occupational-and-social-impairment scale, separate percentages would be rating the same impairment more than once.

Under the Mittleider principle, when symptoms cannot be clearly separated between a service-connected mental disorder and another condition, those symptoms are attributed to the service-connected disorder, which works in the veteran's favor for the single combined rating. The general evaluation procedures, including assigning one evaluation for coexisting psychiatric diagnoses, are described in M21-1, Part V, Subpart ii, Chapter 3, Section D (Evaluating Disabilities). A genuinely separate condition with its own distinct, non-overlapping symptoms and its own diagnostic code (for example, migraine headaches rated under DC 8100) can still be rated separately, as long as the same symptoms are not counted twice.

Evidence That Wins These Claims

The Board's published decisions surface which kinds of evidence appear most often in granted depression appeals. The figures below are win rates, the share of decisions citing that evidence type that were granted, drawn from published BVA decisions for DC 9434 (major depressive disorder).

  • A private nexus opinion. The largest measured swing. Approximately 91.9% of major depressive disorder appeals were granted when a private nexus opinion was in the file, versus 65.4% without it (published BVA decisions, n = 1,156 with / 2,144 without). For DC 9435 the lift was larger: approximately 82.8% granted with a private nexus opinion versus 40.3% without (published BVA decisions, n = 1,176 with / 3,767 without).
  • A nexus letter, as an evidence type. In major depressive disorder decisions that cited a nexus letter, approximately 79% were granted (published BVA decisions, n = 1,606). This was the top evidence type for the condition.
  • Medical literature. In decisions citing supporting medical literature, approximately 66% were granted (published BVA decisions, n = 310).
  • A private medical opinion. In decisions citing a private medical opinion, approximately 59% were granted (published BVA decisions).
  • Buddy and lay statements. In decisions citing buddy or lay statements, approximately 55% were granted (published BVA decisions). Lay statements describing changes in mood, functioning, and daily life since service help document the longitudinal picture the 4.130 formula calls for.
  • Service treatment records and the VA examination. In decisions citing service treatment records, approximately 54% were granted. In decisions citing the VA examination, approximately 53% were granted (published BVA decisions). These trail the private-opinion evidence types.
What the data shows about nexus opinions. Across both depression codes, the presence of a private nexus opinion tracks with the largest jump in grant rate, and the nexus letter is the single highest-win-rate evidence type. The nexus letters page catalogues what a linking opinion typically addresses for a secondary depression claim.

Common Mistakes

Patterns the Board's published decisions and the VA's manual surface:

  • No confirmed DSM-5 diagnosis: "no current diagnosis" is the second-most-common denial reason for both codes (121 of 881 classified denials for 9434, 925 of 3,859 for 9435, per published BVA decisions). 38 CFR 4.125 requires the diagnosis to conform to the DSM-5.
  • No medical nexus opinion: the absence of a link to service or to a service-connected condition is the single largest denial driver, roughly 72% of classified 9434 denials (636 of 881) and roughly 62% of classified 9435 denials (2,400 of 3,859), per published BVA decisions.
  • Expecting a separate rating per diagnosis: depression plus anxiety or depression plus PTSD yields one combined evaluation under 4.130 and 4.14, not two stacked percentages.
  • Assuming a presumptive applies: no Agent Orange, PACT Act, or Camp Lejeune presumption covers depression. It must be established directly or as a secondary.
  • Overlooking the secondary pathway: claiming depression only on a direct basis can miss that depression caused or aggravated by a service-connected condition such as chronic pain, tinnitus, or PTSD grants at roughly 77% or higher in published BVA decisions.
  • Letting one exam define the rating: 4.130 calls for evaluation based on the frequency, severity, and duration of symptoms over time, so a single snapshot exam can understate true occupational and social impairment.
  • For MST-based claims, assuming the event had to be formally reported: the VA accepts behavioral markers and lay evidence in lieu of an official report under the personal-trauma development rules.

Diagnostic Tests and the DBQ

Depression is established and rated through clinical evaluation rather than a lab value. The records and forms the VA relies on include:

  • The mental disorders C&P examination and DBQ. The standard form is DBQ 21-0960P-2, Mental Disorders (Other Than PTSD and Eating Disorders). The examiner assesses occupational and social impairment against the 38 CFR 4.130 General Rating Formula. See the DBQ guide.
  • The PTSD DBQs, when the claim is trauma-based. The Initial PTSD DBQ (21-0960P-3) or Review PTSD DBQ (21-0960P-4) is used instead when the claimed disorder is trauma-based, including MST-related depression evaluated alongside or as PTSD.
  • A DSM-5 diagnostic interview. 38 CFR 4.125 requires a diagnosis conforming to the DSM-5, with an assessment of symptom frequency, severity, and duration rather than a single snapshot.
  • VA Form 21-0781, Statement in Support of Claim for Service Connection for PTSD or Mental Health Conditions Related to a Traumatic Event, which documents the in-service stressor, including a personal-assault or MST stressor.
  • Treatment and medication records. Service treatment records plus post-service VA and private mental-health records and medication history. Antidepressant use bears directly on the 10% and 30% tiers of the formula.
  • Lay and behavioral-marker evidence. Buddy and lay statements, and for MST stressors, behavioral markers where contemporaneous reporting may be absent.

Frequently Asked Questions

Is depression rated differently from PTSD or anxiety?
No. Depression (DC 9434 and DC 9435), PTSD (DC 9411), and anxiety are all rated on the same scale, the General Rating Formula for Mental Disorders at 38 CFR 4.130. The percentage is set by the level of occupational and social impairment your symptoms cause, scored at 0, 10, 30, 50, 70, or 100 percent, not by which diagnosis label appears in your file.
I have both depression and PTSD. Do I get two separate ratings?
No. The VA assigns one combined evaluation for all service-connected mental-health conditions under 38 CFR 4.130 and the anti-pyramiding rule at 38 CFR 4.14. Because every mental condition is scored on the same occupational-and-social-impairment scale, separate percentages would rate the same impairment twice. Under the Mittleider principle, overlapping symptoms that cannot be cleanly separated are attributed to the service-connected disorder for that single combined rating.
What is the difference between DC 9434 and DC 9435?
DC 9434 is major depressive disorder, the specific DSM-5 diagnosis often called MDD or clinical depression. DC 9435 is unspecified depressive disorder, used when a provider documents a depressive disorder that does not fully meet the criteria for a more specific diagnosis. Both are rated on the identical 38 CFR 4.130 scale, so the code does not change how the percentage is calculated.
Is depression a presumptive condition under Agent Orange or the PACT Act?
No. Depression has no presumptive pathway. There is no Agent Orange, PACT Act or burn-pit, or Camp Lejeune presumption that covers depression. It is established by direct service connection (in-service onset with a nexus) or by secondary service connection to an already service-connected condition. A depression diagnosis alone, even with qualifying exposure history, does not trigger a presumption.
Can depression be service connected as secondary to a physical condition?
Yes, and the Board's published decisions show this is a strong theory. Depression caused or aggravated by a service-connected condition such as chronic pain, tinnitus, sleep apnea, or TBI is claimed under 38 CFR 3.310. For example, tinnitus to major depressive disorder was granted in approximately 77% of appeals (published BVA decisions, n = 83), and a service-connected back strain to major depressive disorder in approximately 79% (published BVA decisions, n = 50). A secondary claim needs a current depression diagnosis and a medical opinion linking it to the service-connected condition.
My depression comes from military sexual trauma I never reported. Does that matter?
Under the VA's personal-trauma development rules, you do not need proof that the MST was reported at the time. The VA may accept behavioral "markers," such as transfer requests, performance drops, or new mental-health treatment, as evidence the event occurred. MST is not a presumption. It is a relaxed-evidence pathway that can support depression as well as PTSD. The VA.gov page on military sexual trauma and disability compensation lists major depressive disorder among the conditions that can be service connected when caused by MST.

Related Tools and Guides

DC 9434, Major Depressive Disorder
Per-code page: rating levels, BVA grant data, and evidence types.
Mental Health Rating Formula
How 38 CFR 4.130 rates every mental-health condition from 0 to 100%.
PTSD Claims Guide
When depression co-exists with PTSD, VA assigns one combined mental rating.
Anxiety Claims Guide
Anxiety and depression share the same 4.130 rating formula.
Secondary Conditions
Depression secondary to chronic pain, tinnitus, sleep apnea, or TBI.
Nexus Letters
What a nexus opinion needs for a secondary depression claim.

Sources: 38 CFR 4.130, General Rating Formula for Mental Disorders (DC 9434 and DC 9435) · VA.gov, Military sexual trauma and disability compensation · VA.gov, disability compensation eligibility for PTSD and mental health conditions. This guide is educational, not legal or medical advice, and not a prediction of any individual claim outcome. Rating criteria can change. Confirm current details in 38 CFR 4.130. For help with your own claim, talk to a VA-accredited representative.