Upcoming Claims Editing Enhancement: Taxonomy Code Validation
Effective Mid-August 2026
Dear Provider Partner,
In accordance with MDHHS guidance, Meridian will implement hard claim edits that may result in claim denials related to provider taxonomy code validation beginning in mid-August 2026 for both Medicaid and HIDE D-SNP claims. Accurate taxonomy reporting helps ensure claims are processed correctly, routed appropriately, and reimbursed without unnecessary delays.
What is changing?
Beginning in mid-August, claims may deny if the required taxonomy information is missing, invalid, or does not match the provider information on file. The claim must be corrected and resubmitted before it can continue through claims processing.
What is a taxonomy code?
A taxonomy code is a unique 10-character code that identifies a provider’s type, classification, and area of specialization. Taxonomy codes submitted on a claim must:
- Match the provider information associated with the billing or servicing provider;
- Be valid and active; and
- Be submitted in the appropriate claim field when required.
The following edits will be enforced:
Edit Code | Description |
|---|---|
1115 Billing Provider Taxonomy Invalid or Missing | If the Claim Type Header is Ambulance (I) or Outpatient (F), and a Billing Provider Taxonomy is present but not valid, the system will post an edit at the header.
|
1423 Invalid Billing Provider Taxonomy Code at Header | The Billing Provider Taxonomy on the data file is validated against the database. If the code is not found, an error is raised.
|
1454 Invalid Servicing or Rendering Provider Taxonomy Code at Header | The Servicing/Rendering Provider Taxonomy at the header is validated against the database. If it is not found, an error is raised.
|
1455 Invalid Servicing or Rendering Provider Taxonomy Code at Line | The Servicing/Rendering Provider Taxonomy at the line level is validated against the database. If it is not found, an error is raised.
|
1485 Invalid Servicing or Attending Provider Taxonomy Code at Header | The Servicing/Attending Provider Taxonomy at the header is validated against the database. If it is not found, an error is raised.
|
1564 Invalid Referring Provider Taxonomy Code at Header | The Referring Provider Taxonomy at the header does not match the database.
|
1606 Missing Provider Taxonomy Code at Header | If a file is submitted without a Billing Provider Taxonomy Code, an error is raised.
|
What Providers Should Do Now
To avoid claim denials after implementation, verify that your taxonomy codes are current and correctly associated with your National Provider Identifier (NPI).
- Ensure your practice management system, clearing house, or billing vendor is submitting the appropriate taxonomy code on claims.
- Review your claim submission process to confirm that the required taxonomy fields are populated.
- Test any necessary system updates before the mid-August implementation date.
If you have any questions regarding these changes, please contact Provider Relations or refer to the MDHHS Companion Guide.