ICD-10 code for olfactory neuralgia

The ICD-10-CM code for olfactory neuralgia is G52.0 (Disorders of olfactory nerve).

Within G52 (disorders of other cranial nerves), G52.0 is specifically for disorders of olfactory nerve. Related codes cover disorders of glossopharyngeal nerve (G52.1), disorders of vagus nerve (G52.2), disorders of hypoglossal nerve (G52.3), disorders of multiple cranial nerves (G52.7), disorders of other specified cranial nerves (G52.8) and cranial nerve disorder, unspecified (G52.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.