Condition Code A6: Vaccines/Immunizations

Overview

The provided source documents do not include a definition for UB-04 Condition Code A6. The Noridian Condition Codes page (last updated Feb 12, 2026) lists only numeric codes 01–77, none of which correspond to “Vaccines/Immunizations.” The MassHealth UB-04 Billing Guide (August 2023) does not reference Condition Code A6 either. Without a traceable source, no further description can be given.

When to Use

No source in the provided material specifies when Condition Code A6 should be used. According to the user’s instruction, the code means “Vaccines/Immunizations,” but this meaning cannot be verified against the available sources. Therefore, usage guidance cannot be provided.

Step-by-Step Claim Example

No example can be constructed because the code’s definition and application are not present in the Noridian or MassHealth sources.

Common Mistakes & Audit Red Flags

No audit or compliance advice can be offered without source documentation for Code A6.

Related Codes/Fields

The following table lists condition codes from the Noridian source that might appear on the same claim as a vaccine/immunization service. None are directly associated with A6.

Code	Meaning (from Noridian)
01	Military service related; coordinate with the VA
02	Patient alleges condition due to employment environment (workers’ compensation, black lung)
03	Patient covered by insurance not reflected here
22	Patient on Multiple Drug Regimen
23	Home Care Giver Available
24	Home IV Patient Also Receiving HHA Services
46	Nonavailability statement on file
50	Product replacement for known recall
53	Initial placement of medical device as part of clinical trial or free sample

Note: No field-to-field relationships for Code A6 can be identified from the provided sources.

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Disclaimer: This article cannot be completed because the required source materials do not contain any mention of Condition Code A6. To produce accurate reference content, please provide a source (e.g., an official NUBC manual, CMS publication, or payer-specific guide) that includes the definition and usage of Code A6.