ICD-10 A83.0
Billable / Specific MCCJapanese encephalitis
About ICD-10-CM A83.0
ICD-10-CM code A83.0 represents Japanese encephalitis. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block A83). The 2026 edition of ICD-10-CM A83.0 became effective on October 1, 2025.
Coding Tips for A83.0
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
A83.0 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 Japanese encephalitis. As a Major Complication/Comorbidity (MCC), this can shift the DRG assignment to a higher-weighted category, substantial reimbursement impact.
Medicare LCD Coverage for A83.0
Local Coverage Determinations (LCDs) from CMS MACs that list A83.0 as a covered diagnosis.
Showing top 10 of 67 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing A83.0.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with A83.0
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
- G2189 CMS LCD: Billing and Coding: CT of the Head CMS LCD
- G2194 CMS LCD: Billing and Coding: CT of the Head CMS LCD
- G2193 CMS LCD: Billing and Coding: CT of the Head CMS LCD
Convert A83.0 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| A83.0 | 0620 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To A83.0
Other codes in section A80-A89 (Viral and prion infections of the central nervous system).
ICD-10 A83.0, Billing FAQ
Is ICD-10 code A83.0 billable? +
Yes, A83.0 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is A83.0 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 A83.0? +
Procedures frequently paired with A83.0 include: 95929, 92651, 92653, 95928, 95930.
What ICD-9 codes does A83.0 map to? +
Per CMS GEMs, A83.0 maps to ICD-9 codes: 0620. Useful for legacy data review and historical claim analysis.
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 May 31, 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