ICD-10 Z91.0121
Billable / SpecificAllergy to eggs with tolerance to baked egg
About ICD-10-CM Z91.0121
ICD-10-CM code Z91.0121 represents Allergy to eggs with tolerance to baked egg. This is a billable/specific code in the Factors Influencing Health Status chapter (block Z91). The 2026 edition of ICD-10-CM Z91.0121 became effective on October 1, 2025.
Type 1 Excludes
Pure excludes, these codes can never be coded together with Z91.0121. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- Allergy to eggs with reactivity to baked egg (Z91.0122)
Medicare LCD Coverage for Z91.0121
Local Coverage Determinations (LCDs) from CMS MACs that list Z91.0121 as a covered diagnosis.
Showing top 10 of 174 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z91.0121.
5 Medicare
CPT Codes Commonly Billed with Z91.0121
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.
Codes Adjacent To Z91.0121
Other codes in section Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).
ICD-10 Z91.0121, Billing FAQ
Is ICD-10 code Z91.0121 billable? +
Yes, Z91.0121 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for Z91.0121? +
Type 1 Excludes (never code together with Z91.0121): Allergy to eggs with reactivity to baked egg (Z91.0122)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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