ICD-10 A84.81
Billable / Specific MCCPowassan virus disease
About ICD-10-CM A84.81
ICD-10-CM code A84.81 represents Powassan virus disease. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block A84). The 2026 edition of ICD-10-CM A84.81 became effective on October 1, 2025.
Coding Tips for A84.81
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
A84.81 is designated MCC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-MCC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag MCC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inpatient DRG Impact, MCC
codes Powassan virus disease. As a Major Complication/Comorbidity (MCC), this can shift the DRG assignment to a higher-weighted category, substantial reimbursement impact.
Medicare LCD Coverage for A84.81
Local Coverage Determinations (LCDs) from CMS MACs that list A84.81 as a covered diagnosis.
Showing top 10 of 39 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing A84.81.
2 Medicare
CPT Codes Commonly Billed with A84.81
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 95929 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
- 92651 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
- 92653 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
- 95928 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
- 95930 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
- 92652 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
- 95939 CMS LCD: Billing and Coding: Neurophysiology Evoked Potentials (NEPs) CMS LCD
Codes Adjacent To A84.81
Other codes in section A80-A89 (Viral and prion infections of the central nervous system).
ICD-10 A84.81, Billing FAQ
Is ICD-10 code A84.81 billable? +
Yes, A84.81 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is A84.81 a CC or MCC for inpatient DRG? +
Yes, this code is designated as MCC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with A84.81? +
Procedures frequently paired with A84.81 include: 95929, 92651, 92653, 95928, 95930.
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team