ICD-10 code for Hunt's disease

The ICD-10-CM code for Hunt's disease is B02.21 (Postherpetic geniculate ganglionitis). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on B02.21.

Within B02.2 (zoster with other nervous system involvement), B02.21 is specifically for postherpetic geniculate ganglionitis. Related codes cover postherpetic trigeminal neuralgia (B02.22), postherpetic polyneuropathy (B02.23), postherpetic myelitis (B02.24) and other postherpetic nervous system involvement (B02.29).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

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), DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), DRG 791 (Prematurity with Major Problems, relative weight 4.1075), DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and 1 more, in MDC 01 (Diseases and Disorders of the Nervous System), MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.