B02.22 ICD-10-CM Code: Postherpetic trigeminal neuralgia
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Viral infections characterized by skin and mucous membrane lesions (B00-B09)
B02.22
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePostherpetic trigeminal neuralgia
Persistent nerve pain in the area supplied by the trigeminal nerve (affecting the face) that develops after a shingles infection in that region.
Buddy Insight
Postherpetic trigeminal neuralgia is one of the most common and debilitating complications of herpes zoster, causing severe, persistent facial pain along trigeminal nerve distributions after shingles resolves.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
MappedHCC 168
RAF 0.0
Code Trumping
Basket needed
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for B02.22 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for B02.22 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for B02.22 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for B02.22 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for B02.22 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for B02.22 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for B02.22 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is B02.22 an HCC code?
No. B02.22 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
Work B02.22 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for B02.22
For B02.22to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed B02.22 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
B02.22 is the ICD-10-CM diagnosis code for postherpetic trigeminal neuralgia. Persistent nerve pain in the area supplied by the trigeminal nerve (affecting the face) that develops after a shingles infection in that region. B02.22 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering viral infections characterized by skin and mucous membrane lesions (b00-b09).
B02.22 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Maps only to RxHCC 168 (Vertebral Fractures) with RAF 0.0. This code does NOT map to any V28 or V24 community HCC, so it has no community model risk adjustment value. Its primary coding importance is clinical accuracy and RxHCC prescription drug model mapping.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for B02.22 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is one of the most common postherpetic complications and may persist for months or years
- •Document the distribution of pain (V1, V2, or V3 trigeminal division) when possible
Clinical Significance
Postherpetic trigeminal neuralgia is one of the most common and debilitating complications of herpes zoster, causing severe, persistent facial pain along trigeminal nerve distributions after shingles resolves. It significantly impacts quality of life and often requires multimodal pain management including anticonvulsants, antidepressants, and nerve blocks.
Documentation Requirements
- ✓History of herpes zoster in the trigeminal nerve distribution (ophthalmic V1, maxillary V2, or mandibular V3)
- ✓Pain persisting more than 90 days after rash onset (defining criterion for postherpetic neuralgia)
- ✓Specific trigeminal division affected (V1, V2, V3)
- ✓Pain characteristics: burning, stabbing, allodynia, hyperalgesia
- ✓Current pain management regimen and treatment response
Commonly Confused Codes
- •G50.0 (Trigeminal neuralgia, unspecified): Idiopathic or vascular-related trigeminal neuralgia without postherpetic cause; B02.22 requires a preceding herpes zoster episode
- •B02.21 (Postherpetic geniculate ganglionitis): Affects the facial nerve/geniculate ganglion, not the trigeminal nerve
- •B02.29 (Other postherpetic nervous system involvement): Use B02.22 when the trigeminal nerve is specifically documented