Secondary condition mapper

Nexus argument: PTSD frequently co-occurs with and can cause or aggravate major depressive disorder through intrusive memories, hyperarousal, and isolation.

Potential rating: 10%–70%

Evidence needed

• Mental health records listing both diagnoses
• Statement describing depressive symptoms after PTSD onset
• Treatment notes showing functional impact

Nexus argument: Hypervigilance and panic symptoms from PTSD commonly support a separate or overlapping anxiety diagnosis secondary to PTSD.

Potential rating: 10%–70%

Evidence needed

• Clinician notes on anxiety symptoms
• Buddy statements about panic / avoidance
• Medication history for anxiety

Nexus argument: PTSD-related sleep disruption, nightmares, weight changes, and sedating medications can contribute to obstructive sleep apnea.

Potential rating: 0%–100%

Evidence needed

• Sleep study
• CPAP prescription
• Notes linking sleep issues to PTSD / meds

Nexus argument: PTSD-related stress, sleep loss, and tension can trigger or aggravate migraine headaches as a secondary condition.

Potential rating: 0%–50%

Evidence needed

• Headache log (frequency, duration, prostration)
• Neurology or primary care notes
• Work missed due to migraines

Nexus argument: Many veterans with PTSD also have traumatic brain injury from the same events; TBI residuals may be claimed separately when medically supported.

Potential rating: 0%–70%

Evidence needed

• Service records of blast / head injury
• Neuropsych testing
• TBI residual diagnosis