Related Resources
- MLN® Educational Tool: How to Use the Medicare National Correct Coding Initiative (NCCI) Tools
- Medicare National Correct Coding Initiative (NCCI) Edits
- Medicare NCCI Medically Unlikely Edits (MUEs)
- National Correct Coding Initiative Policy Manual
- Medicare NCCI Add-on Code Edits
- Medicare NCCI Procedure to Procedure (PTP) Edits
- Modifier 59 and the Subset Modifiers XE, XP, XS, XU – Specific Modifiers for Distinct Procedural Services
- Bundled Services Missing Appropriate Modifiers at Time of Initial Claim Submission
- For inquiries related to NCCI (PTP, MUE and add-on-codes) edits you can email your questions to ncciptpmue@cms.hhs.gov. Please note that questions outside the scope of NCCI or about other CMS programs will not be answered. Inquiries should not include PII or PHI.
- If you have concerns regarding specific NCCI edits, please submit your comments in writing to NCCIPTPMUE@cms.hhs.gov.
Revised 5/27/2025