Anthem Elevance Claim Denials Guide
Anthem Elevance Claim Denials: Overview
Anthem Elevance denies 23% of claims according to KFF data. Common reasons include missing prior authorization, incomplete clinical documentation, coding errors, and non-covered services. EOBs are sent within 30–45 days with specific CARC codes identifying the denial reason. Most denials are preventable through pre-submission verification and complete documentation submission.
Key Denial Triggers
- Missing or invalid prior authorization for covered services.
- Incomplete clinical documentation (missing medical records, imaging, or test results).
- CPT or ICD-10 code errors or mismatches (diagnosis does not support procedure).
- Non-covered or excluded service under member's plan.
- Out-of-network provider claim (when in-network option available).
- Patient eligibility lapsed or inactive on date of service.
Common CARC Codes & Resolution
| CARC Code | Reason | Prevention & Appeal |
|---|---|---|
| CO-16 | Claim lacks required documentation | Attach complete medical records, imaging reports, lab results, and clinical notes with original claim or appeal. |
| CO-45 | Claim format or clearinghouse issue | Verify claim is submitted on proper HCFA form with correct format. Resubmit via Availity or provider portal. |
| CO-197 | Non-covered service or exclusion | Check member's plan document for benefit exclusions. Notify patient in writing of out-of-pocket responsibility before service. |
Claim Processing & Timeline
Anthem Elevance processes claims within 30–45 days. EOBs are sent to provider and patient showing payment or denial status. Check the provider portal (providers.anthem.com) or Availity for real-time claim status. Upon denial, the EOB includes the CARC code and reason. File reconsideration or formal appeal within your state deadline (60–365 days from denial date).
Prevention Strategies
Verify real-time eligibility before every service. Confirm prior authorization requirements via the provider portal or Availity. Submit claims with complete clinical documentation on first submission. Use correct CPT and ICD-10 codes with proper diagnosis-to-procedure matching. Flag non-covered services and obtain member financial responsibility acknowledgment before service delivery.
Common Questions
What should I do if Anthem Elevance denies my claim with CO-16?
CO-16 means missing documentation. Check the denial for specific documents needed (imaging, lab results, clinical notes). File appeal or resubmit claim with complete documentation attached.
Can I appeal a non-covered service denial from Anthem Elevance?
Yes. If you believe the service is covered or medically necessary, file an appeal with clinical evidence and peer-reviewed literature. Include physician attestation of medical necessity.
How long do I have to appeal an Anthem Elevance denial?
Appeal deadline varies by state and plan type (60–365 days from denial). Check your state's insurance regulations. File as soon as possible to allow time for multiple appeal levels.
Altair checks Anthem Elevance requirements before submission . flagging missing authorizations and coding mismatches in real time. See how Altair works.
This reference is for informational purposes. Payer policies change frequently. Always verify against Anthem Elevance's current provider documentation. Last updated: 2026-03-16.