R43.0: Anosmia

We perceive smells using our olfactory nerves in our upper nose. There can be various reasons why someone’s sense of smell is weaker or non-existent. The air may not be reaching the olfactory nerves effectively. This is the case, for example, if the nose is blocked due to long-term inflammation. Disorders of the nervous system can also harm one’s sense of smell. Some pathogens, drugs and injuries can also harm one’s sense of smell.

If one’s sense of smell is poor, it may be more difficult to taste some things, too. So deterioration in one’s sense of smell might be noticed due to a deterioration in one’s sense of taste.

Patient Disclaimer

The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.

If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.

For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.