340B ESP performs a series of data validations on all 340B pharmacy and medical claims submissions to ensure accuracy, completeness, and compliance with manufacturer policies. These validations occur both before data is ingested (front-end) and after it has successfully entered the platform (back-end).
What are Data Validations?
Data validations are checks ESP applies to every 340B claim submission to confirm that the data is structurally correct, compliant with manufacturer policy, and suitable for 340B pricing. These checks help covered entities submit clean, reliable, claims and reduce downstream processing issues.
ESP performs validations in two stages:
Front-end validations – occur before ingestion and focus on data structure, formatting, required fields, and manufacturer requirements for submission.
Back-end validations – occur after ingestion and evaluate policy compliance, data consistency, and manufacturer-defined conditions.
Together, these validations help ensure that only accurate and compliant claims proceed to into 340B ESP.
Front-end Validations
Front-end validations are the first set of checks ESP performs on pharmacy and medical claim submissions before any data is ingested into the platform. These validations ensure claims include required data fields, meet formatting specifications, and reference eligible entities and products.
Front-end validations take place before ESP accepts a file for processing, whether claims are submitted through the web application or via the SDK. These validations prevent invalid or incomplete 340B claims from entering the system and ensure that data aligns with manufacturer policies.
Front-end validations are designed to:
Confirm the NDCs in the submission are in scope of a 340B ESP contract pharmacy policy.
Verify data types, formats, and field lengths.
Confirm that all required fields are present.
Only claims that pass all front-end validations proceed to ingestion and subsequent back-end validations.
Tip: For more information on front-end validations, the different types of front-end validations, and how they work, check out Front-end Validations.
Back-end Validations
Back-end validations are the set of checks ESP performs after a 340B pharmacy or medical claims has been successfully ingested into the platform. These validations evaluate help ensure submitted data meets manufacturer 340B ESP policies.
Back-end validations occur after a claim submission passes all front-end validations and is ingested into ESP. At this stage, ESP evaluates the claim against regulatory, policy, and manufacturer policy that cannot be fully assessed before ingestion.
Back-end validations are designed to:
Verify submitted data values are valid and active (e.g., NPIs, NDCs, Provider IDs).
Ensure claims submitted meet manufacturer's contract pharmacy policy, including eligibility, timeliness, and non-duplication requirements.
Ensure alignment with expected quantity and measurement qualifications.
Tip: For more information on back-end validations, the different types of back-end validations, and how they work, check out Back-end Validations.
Data Corrections
When a claim fails a front-end validation, covered entities must correct the underlying data before the claim can be submitted to 340B ESP. The required correction depends on the specific validation that occurred.
Claims that fail front-end validations are prevented from entering ESP until the identified data issues are resolved. Common corrections include updating required fields, resolving formatting issues, or providing data necessary to satisfy manufacturer submission requirements.
For more information about specific validation failures and their resolution steps, see the Front-end Validations and Back-end Validations articles.
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