Olfactory Nerve Dysfunction (Cranial Nerve I)

DC 8205Neurological38 CFR 4.124a, DC 8205 (by analogy)

Loss or reduction of the sense of smell due to damage to the first cranial nerve. Common after traumatic brain injury, blast exposure, or nasal surgery. Also affects taste perception since smell and taste are closely linked.

How the VA rates this condition

The VA rates this condition based on how much it affects your ability to work and carry out daily activities. The examiner will focus on the functional limitations your condition causes, not just the diagnosis itself.

Diagnostic code

DC 8205

Rating range

0% – 10%

Rating levels

Rating criteria are defined in 38 CFR 4.124a, DC 8205 (by analogy). This guide presents a plain-language summary and is not a substitute for the full regulatory text. Always consult a VSO or VA-accredited attorney for case-specific advice.

Rating Levels

Complete loss of smell (anosmia) — you cannot detect odors at all. This also significantly reduces your sense of taste and creates safety risks (inability to smell smoke, gas leaks, or spoiled food).

What the VA looks for

Complete anosmia confirmed by formal olfactory testing (UPSIT or Sniffin Sticks)
Documented TBI, blast exposure, or nasal trauma
Associated taste dysfunction (ageusia or hypogeusia)
Safety concerns documented (inability to detect smoke, gas, spoiled food)

Common Pitfalls

⚠Not getting formal olfactory testing — simple self-reporting of smell loss is insufficient. The University of Pennsylvania Smell Identification Test (UPSIT) or similar standardized test provides objective evidence.
⚠Not connecting anosmia to a service-connected TBI or blast exposure — smell loss is one of the most common TBI residuals but is frequently overlooked. A medical nexus linking the anosmia to your head injury is essential.
⚠Forgetting to report taste dysfunction — loss of smell significantly impairs taste. Document both conditions since they may be rated separately.
⚠Not documenting safety implications — inability to smell smoke, natural gas, chemical leaks, or spoiled food is a genuine safety hazard that demonstrates functional impairment.

Related DBQ Forms

DBQ Cranial Nerves Diseases
DBQ Sinusitis, Rhinitis, and Other Conditions of the Nose, Throat, Larynx, and Pharynx

View evidence checklist →See secondary conditions →

Condition Rating Guides

Understand what the VA looks for at each rating level — loading conditions…

How the VA rates this condition

Diagnostic code

DC 8205

Rating range

0% – 10%

Rating levels

Rating Levels

What the VA looks for

Complete anosmia confirmed by formal olfactory testing (UPSIT or Sniffin Sticks)
Documented TBI, blast exposure, or nasal trauma
Associated taste dysfunction (ageusia or hypogeusia)
Safety concerns documented (inability to detect smoke, gas, spoiled food)

Common Pitfalls

⚠Not getting formal olfactory testing — simple self-reporting of smell loss is insufficient. The University of Pennsylvania Smell Identification Test (UPSIT) or similar standardized test provides objective evidence.

⚠Not connecting anosmia to a service-connected TBI or blast exposure — smell loss is one of the most common TBI residuals but is frequently overlooked. A medical nexus linking the anosmia to your head injury is essential.

⚠Forgetting to report taste dysfunction — loss of smell significantly impairs taste. Document both conditions since they may be rated separately.

⚠Not documenting safety implications — inability to smell smoke, natural gas, chemical leaks, or spoiled food is a genuine safety hazard that demonstrates functional impairment.