ICD-10 Z20.820
Billable / SpecificContact with and (suspected) exposure to varicella
About ICD-10-CM Z20.820
ICD-10-CM code Z20.820 represents Contact with and (suspected) exposure to varicella. This is a billable/specific code in the Factors Influencing Health Status chapter (block Z20). The 2026 edition of ICD-10-CM Z20.820 became effective on October 1, 2025.
Medicare LCD Coverage for Z20.820
Local Coverage Determinations (LCDs) from CMS MACs that list Z20.820 as a covered diagnosis.
Showing top 10 of 27 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z20.820.
1 Cigna
1 Medicare
CPT Codes Commonly Billed with Z20.820
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert Z20.820 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 |
|---|---|---|
| Z20.820 | V0171 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Z20.820
Other codes in section Z20-Z29 (Persons with potential health hazards related to communicable diseases).
ICD-10 Z20.820, Billing FAQ
Is ICD-10 code Z20.820 billable? +
Yes, Z20.820 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does Z20.820 map to? +
Per CMS GEMs, Z20.820 maps to ICD-9 codes: V0171. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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