DC 7829Skin ConditionsLast verified: APR 22, 2026

Secondary Conditions for Chloracne

Chloracne is a service-connected condition that can cause or aggravate 1 additional disability under 38 CFR § 3.310. Common secondaries include Major Depressive Disorder (Disfigurement). Each secondary requires medical nexus evidence linking it to the primary, documented in treatment records or a private nexus letter.

“Disability which is proximately due to or the result of a service-connected disease or injury shall be service connected.”
— 38 CFR § 3.310(a), Disabilities that are proximately due to, or aggravated by, service-connected disease or injury
Evidence Strength:STRONGMODERATEEMERGING

Which secondary conditions are most common after Chloracne?

MODERATE

Medical Rationale

Chloracne from Agent Orange (dioxin) exposure produces severe, chronic cystic acne lesions primarily on the face, behind the ears, and on the trunk. Unlike ordinary acne, chloracne lesions are treatment-resistant and can persist for decades due to dioxin accumulation in adipose tissue with a half-life of 7-11 years. The persistent facial disfigurement produces significant psychological distress through impaired self-image, social stigmatization, and constant visible reminder of toxic exposure. Additionally, dioxin itself is a potent endocrine disruptor that may directly affect neurotransmitter systems — dioxin exposure is independently associated with increased depression risk even after controlling for disfigurement. Vietnam-era veterans with chloracne report significantly higher rates of depression, social isolation, and suicidal ideation compared to Agent Orange-exposed veterans without skin manifestations.

Key Studies

Taylor JS (1979) J Am Acad Dermatol (chloracne — clinical features and prognosis); Kim JS et al. (2003) Environ Health Perspect (dioxin exposure, chloracne, and psychological outcomes in Korean Vietnam veterans).

Filing Tips

Chloracne is a presumptive condition for Agent Orange exposure — ensure the chloracne service connection is already established. Psychiatric evaluation documenting depression with body image disturbance. Dermatology records showing persistent facial chloracne lesions. Psychiatry nexus letter addressing both disfigurement-related depression and potential direct neurotoxic effects of dioxin. Photographs documenting severity. Consider depression separately under DC 9434 — the VA cannot pyramid scar disfigurement and mental health symptoms, but they are separately ratable conditions.

How do I file a secondary service connection claim?

File VA Form 21-526EZ and list the secondary condition as a new claimed disability, noting it is secondary to Chloracne. Submit a nexus letter at the time of filing — the VA does not request nexus evidence on your behalf. An effective date of Intent to File (VA Form 21-0966) protects your start date for up to 12 months while you gather medical evidence.

Common Questions About Secondary Service Connection

What is a secondary service-connected condition?

A secondary service-connected condition is a disability that is proximately caused or chronically worsened by an already service-connected condition. The VA rates secondary conditions separately and combines them with the primary rating using the combined ratings table under 38 CFR § 4.25.

What legal standard applies to secondary service connection?

38 CFR § 3.310(a) governs secondary service connection. It states: "Disability which is proximately due to or the result of a service-connected disease or injury shall be service connected." Aggravation claims — where the primary condition worsens a pre-existing disability — are covered under § 3.310(b).

Which secondary conditions are most common after Chloracne?

The 1 secondary conditions documented for Chloracne vary by evidence strength. The most strongly supported include: Major Depressive Disorder (Disfigurement). Evidence strength reflects the volume and quality of medical literature linking each secondary to the primary condition.

What evidence proves a secondary condition is caused by the primary?

The most reliable evidence is a private nexus letter from a treating physician or independent medical examiner that: (1) acknowledges the service-connected primary condition, (2) diagnoses the secondary condition, and (3) states to at least a 50% probability ("as likely as not") that the primary caused or aggravated the secondary. Treatment records documenting the progression are supporting evidence, not a substitute.

How does the VA rate secondary conditions?

Secondary conditions are rated under the same 38 CFR Part 4 diagnostic codes as any other condition. The VA then combines the primary and all secondary ratings using the combined ratings formula under § 4.25 — not simple addition. For example, a 50% primary and a 30% secondary combine to 65% (rounded to 70%), not 80%.

How do I file a secondary service connection claim?

File VA Form 21-526EZ and list the secondary condition as a new claimed disability, specifically noting it is secondary to your already service-connected primary condition. Submit a nexus letter and all relevant treatment records at the time of filing. If your primary claim is already decided, you can file for the secondary as a new claim at any time — the effective date will be the date of the new claim.

Can I add secondary conditions to an existing claim after it has been decided?

Yes. Secondary conditions can be added at any time as a new claim. The effective date for the secondary will generally be the date VA receives your new claim (or the date of an Intent to File, if filed within the preceding 12 months). If the secondary was improperly denied in an earlier rating decision, a Supplemental Claim or Higher-Level Review may allow an earlier effective date.

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