2024 ICD-10-CM Diagnosis Code B02.21

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Postherpetic geniculate ganglionitis

  • B02.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM B02.21 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of B02.21 – other international versions of ICD-10 B02.21 may differ.

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The following code(s) above B02.21 contain annotation back-references

 that may be applicable to B02.21:

  • A00-B99  Certain infectious and parasitic diseases
  • B02  Zoster [herpes zoster]

Approximate Synonyms

  • Herpes zoster auricularis
  • Ramsey hunt syndrome

Clinical Information

  • A syndrome characterized by facial palsy in association with a herpetic eruption of the external auditory meatus. This may occasionally be associated with tinnitus, vertigo, deafness, severe otalgia, and inflammation of the pinna. The condition is caused by reactivation of a latent herpesvirus 3, human infection which causes inflammation of the facial and vestibular nerves, and may occasionally involve additional cranial nerves. (from Adams et al., Principles of Neurology, 6th ed, p757)
  • A viral ear infection caused by the spread of varicella-zoster virus to the facial nerves. It is characterized by intense otalgia and a cutaneous vesicular eruption.

ICD-10-CM B02.21 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 073 Cranial and peripheral nerve disorders with mcc
  • 074 Cranial and peripheral nerve disorders without mcc
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems
  • 974 Hiv with major related condition with mcc
  • 975 Hiv with major related condition with cc
  • 976 Hiv with major related condition without cc/mcc

Convert B02.21 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Code annotations containing back-references to B02.21:

Diagnosis Index entries containing back-references to B02.21: