MCR-30 - Payer Sequence Error
Medicare / Medicaid Mar 19, 2026
MCR-30 indicates “Payer Sequence Error” in medicare / medicaid workflows.
Medicare / Medicaid Error Codes
Medicare/Medicaid claim and eligibility errors including payer sequencing, enrollment, coverage exhaustion, and state-plan restrictions.
Medicare / Medicaid error codes, explained
This section maps insurance-facing error codes to plain-language meanings and safe next steps. Each page focuses on what the code usually signals in real claims workflows, what documents or fields to verify first, and what to avoid so you don’t create duplicates or miss deadlines.
Use the code directory if you need a quick lookup, and use the guides when you want an end-to-end workflow (submission → review → decision → payment).
What you'll find here
- ✓ Claim, billing, and policy validation codes grouped by real workflow stages
- ✓ Step-by-step fix checklists to resolve rejections, missing data, and processing errors
- ✓ Related-code links to move between similar denial reasons and system failures
- ✓ Insurance guides that link back into the code directory for fast navigation
Popular Guides
Fast, high-signal walkthroughs that link back into the directory.
The Complete Insurance Claim Denial Codes Directory (2026 Edition)
A comprehensive, practical directory of insurance claim denial codes with fix checklists and links to canonical code pages.
150+ Insurance Claim Rejection Reasons Explained (With Fixes)
Breaks down the most common rejection reasons by category and shows the safest fix order to get claims moving again.
Ultimate Guide to Fixing Insurance Claim Errors Step-by-Step
A step-by-step playbook for triaging and fixing insurance claim errors without creating duplicates or missing deadlines.
Insurance Claims Processing Errors: Causes, Codes & Solutions
Explains the claims processing failure buckets and links to the most common codes with actionable resolution steps.
Full Guide to Insurance Billing Errors and How to Resolve Them
A practical guide to billing validation failures and how to correct the underlying cause before resubmitting.
EDI 837 & 835 Errors in Insurance: Complete Troubleshooting Guide
A workflow-first troubleshooting guide for common EDI submission and remittance error patterns with safe fix steps.
Recently Indexed
18 codesMCR-29 - Medicare Crossover Failure
Medicare / Medicaid Mar 19, 2026
MCR-29 indicates “Medicare Crossover Failure” in medicare / medicaid workflows.
MCR-28 - Institutional Claim Format Error
Medicare / Medicaid Mar 19, 2026
MCR-28 indicates “Institutional Claim Format Error” in medicare / medicaid workflows.
MCR-27 - Waiver Program Restriction
Medicare / Medicaid Mar 19, 2026
MCR-27 indicates “Waiver Program Restriction” in medicare / medicaid workflows.
MCR-26 - Retroactive Eligibility Issue
Medicare / Medicaid Mar 19, 2026
MCR-26 indicates “Retroactive Eligibility Issue” in medicare / medicaid workflows.
MCR-25 - Medicaid ID Invalid
Medicare / Medicaid Mar 19, 2026
MCR-25 indicates “Medicaid ID Invalid” in medicare / medicaid workflows.
MCR-24 - Provider Taxonomy Mismatch
Medicare / Medicaid Mar 19, 2026
MCR-24 indicates “Provider Taxonomy Mismatch” in medicare / medicaid workflows.
MCR-23 - Capitation Payment Conflict
Medicare / Medicaid Mar 19, 2026
MCR-23 indicates “Capitation Payment Conflict” in medicare / medicaid workflows.
MCR-22 - Encounter Data Submission Failure
Medicare / Medicaid Mar 19, 2026
MCR-22 indicates “Encounter Data Submission Failure” in medicare / medicaid workflows.
MCR-21 - Incorrect State Billing Format
Medicare / Medicaid Mar 19, 2026
MCR-21 indicates “Incorrect State Billing Format” in medicare / medicaid workflows.
MCR-20 - Service Not Covered Under Medicaid Plan
Medicare / Medicaid Mar 19, 2026
MCR-20 indicates “Service Not Covered Under Medicaid Plan” in medicare / medicaid workflows.
MCR-19 - Prior Authorization Missing – Medicaid
Medicare / Medicaid Mar 19, 2026
MCR-19 indicates “Prior Authorization Missing – Medicaid” in medicare / medicaid workflows.
MCR-18 - Managed Care Enrollment Issue
Medicare / Medicaid Mar 19, 2026
MCR-18 indicates “Managed Care Enrollment Issue” in medicare / medicaid workflows.
MCR-17 - Third Party Liability Issue
Medicare / Medicaid Mar 19, 2026
MCR-17 indicates “Third Party Liability Issue” in medicare / medicaid workflows.
MCR-16 - Dual Eligibility Conflict
Medicare / Medicaid Mar 19, 2026
MCR-16 indicates “Dual Eligibility Conflict” in medicare / medicaid workflows.
MCR-15 - Medicaid State Plan Restriction
Medicare / Medicaid Mar 19, 2026
MCR-15 indicates “Medicaid State Plan Restriction” in medicare / medicaid workflows.
MCR-14 - Invalid Revenue Code for Medicare
Medicare / Medicaid Mar 19, 2026
MCR-14 indicates “Invalid Revenue Code for Medicare” in medicare / medicaid workflows.
MCR-13 - Claim Not Filed Timely – Medicare Limit
Medicare / Medicaid Mar 19, 2026
MCR-13 indicates “Claim Not Filed Timely – Medicare Limit” in medicare / medicaid workflows.
Common / Featured
12 codesMCR-30 - Payer Sequence Error
Medicare / Medicaid ★ Featured
MCR-30 indicates “Payer Sequence Error” in medicare / medicaid workflows.
MCR-29 - Medicare Crossover Failure
Medicare / Medicaid ★ Featured
MCR-29 indicates “Medicare Crossover Failure” in medicare / medicaid workflows.
MCR-28 - Institutional Claim Format Error
Medicare / Medicaid ★ Featured
MCR-28 indicates “Institutional Claim Format Error” in medicare / medicaid workflows.
MCR-27 - Waiver Program Restriction
Medicare / Medicaid ★ Featured
MCR-27 indicates “Waiver Program Restriction” in medicare / medicaid workflows.
MCR-26 - Retroactive Eligibility Issue
Medicare / Medicaid ★ Featured
MCR-26 indicates “Retroactive Eligibility Issue” in medicare / medicaid workflows.
MCR-25 - Medicaid ID Invalid
Medicare / Medicaid ★ Featured
MCR-25 indicates “Medicaid ID Invalid” in medicare / medicaid workflows.
MCR-24 - Provider Taxonomy Mismatch
Medicare / Medicaid ★ Featured
MCR-24 indicates “Provider Taxonomy Mismatch” in medicare / medicaid workflows.
MCR-23 - Capitation Payment Conflict
Medicare / Medicaid ★ Featured
MCR-23 indicates “Capitation Payment Conflict” in medicare / medicaid workflows.
MCR-22 - Encounter Data Submission Failure
Medicare / Medicaid ★ Featured
MCR-22 indicates “Encounter Data Submission Failure” in medicare / medicaid workflows.
MCR-21 - Incorrect State Billing Format
Medicare / Medicaid ★ Featured
MCR-21 indicates “Incorrect State Billing Format” in medicare / medicaid workflows.
MCR-20 - Service Not Covered Under Medicaid Plan
Medicare / Medicaid ★ Featured
MCR-20 indicates “Service Not Covered Under Medicaid Plan” in medicare / medicaid workflows.
MCR-19 - Prior Authorization Missing – Medicaid
Medicare / Medicaid ★ Featured
MCR-19 indicates “Prior Authorization Missing – Medicaid” in medicare / medicaid workflows.
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How to troubleshoot medicare / medicaid codes safely
- Confirm the context first: where did the code appear (carrier portal, billing system, claim platform, or a vendor integration)?
- Validate the time window: effective dates, reporting deadlines, and any timely filing/reopen rules.
- Check identifiers: claim ID, policy number, insured name, loss date, address/VIN, and any required documents.
- Fix the cause before resubmitting: most repeats come from resubmitting unchanged data.
- Escalate with proof: when disputing a decision, bring a short timeline plus the minimum evidence required for review.
The code pages link to related codes and relevant guides so you can move quickly between similar failures.
Frequently Asked Questions
Are these codes official carrier codes?
These pages describe common, industry-typical code labels and decision checkpoints. Carriers can implement different wording, but the underlying workflow buckets are consistent.
Should I resubmit or appeal?
Resubmit when it’s a correctable data/documentation issue and the carrier supports corrected/supplemental workflows. Appeal when you disagree with a coverage or policy determination.
Why do I keep getting duplicates?
Duplicates usually happen when a corrected/supplemental workflow is required, or when key identifiers match a prior submission. Verify status and correction rules before sending again.
What should I collect before contacting support?
Claim ID, policy number, loss/service date, the code label, timestamps, and any submission or batch IDs if this came from an integrated system.