B02.21 Postherpetic geniculate ganglionitis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from B02 Zoster [herpes zoster]

Includes

• shingles
• zona

Risk adjustment (HCC)

• RxHCC V08: HCC 168 — Trigeminal and Postherpetic Neuralgia

MS-DRG index

Defines the logic of DRG(s) 073-074 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 053.11 Geniculate herpes zoster

Code annotations containing back-references to B02.21

Back-references to B02.21

• Type 1 Excludes: G51.1 Geniculate ganglionitis ("postherpetic geniculate ganglionitis (B02.21)")
• Type 1 Excludes: G53 Cranial nerve disorders in diseases classified elsewhere ("postherpetic geniculate ganglionitis (B02.21)")

Back-references to B02

• Type 2 Excludes: B10 Other human herpesviruses ("herpes zoster (B02.-)")
• Type 2 Excludes: B10 Other human herpesviruses ("human herpesvirus 3 (B01.-, B02.-)")
• Type 2 Excludes: B10 Other human herpesviruses ("zoster (B02.-)")
• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B02.21

• Disease, diseased › Hunt's (herpetic geniculate ganglionitis) (neuralgia)
• Ganglionitis › gasserian (postherpetic) (postzoster)
• Ganglionitis › geniculate › postherpetic, postzoster
• Ganglionitis › herpes zoster
• Ganglionitis › postherpetic geniculate
• Herpes, herpesvirus, herpetic › geniculate ganglionitis
• Herpes, herpesvirus, herpetic › zoster › auricularis
• Herpes, herpesvirus, herpetic › zoster › geniculate ganglionitis
• Herpes, herpesvirus, herpetic › zoster › oticus
• Hunt's › disease or syndrome (herpetic geniculate ganglionitis)
• Hunt's › neuralgia
• Neuralgia, neuralgic (acute) › Hunt's
• Neuritis (rheumatoid) › geniculate ganglion › due to herpes (zoster)
• Ramsay-Hunt disease or syndrome
• Syndrome › Hunt's (herpetic geniculate ganglionitis) (neuralgia)

Nearby codes

• B02 Zoster [herpes zoster]
• B02.0 Zoster encephalitis
• B02.1 Zoster meningitis
• B02.2 Zoster with other nervous system involvement
• B02.21 Postherpetic geniculate ganglionitis (this code)
• B02.22 Postherpetic trigeminal neuralgia
• B02.23 Postherpetic polyneuropathy
• B02.24 Postherpetic myelitis
• B02.29 Other postherpetic nervous system involvement
• B02.3 Zoster ocular disease