CO-28 Denial Code Explained
CO-28 is a medical billing denial code that indicates the patient’s treatment plan or services exceeded payer frequency limitations or benefit maximums. This denial commonly occurs when services surpass coverage restrictions.
DENIAL CODE
3/7/20221 min read
CO-28 Denial Code Explained
CO-28 is a medical billing denial code that indicates the patient’s treatment plan or services exceeded payer frequency limitations or benefit maximums. This denial commonly occurs when services surpass coverage restrictions.
What Does CO-28 Mean?
The CO-28 denial code means the insurance payer determined the billed services exceeded allowable coverage frequency, treatment limits, or benefit maximums under the patient’s insurance plan.
This denial is often related to policy limitations or utilization restrictions.
Common Reasons for CO-28
Exceeded visit limitations
Frequency limitation violations
Benefit maximum reached
Repetitive treatment services
Coverage utilization restrictions
Payer policy limitations
How To Fix CO-28
Review the patient’s insurance benefits and verify service frequency limitations before resubmitting the claim. Providers may need to submit medical necessity documentation or appeal requests if additional treatment was clinically necessary.
Accurate benefit verification can help reduce future denials.
Related Denial Codes
You may also encounter:
CO-50 — Service not medically necessary
CO-96 — Non-covered service denial
CO-109 — Coverage limitation denial
PR-204 — Non-covered service denial
Quick Summary
CO-28 indicates the billed services exceeded payer frequency limits or benefit maximums. Most denials are related to insurance coverage limitations or utilization policies.
Medical billing denial codes, insurance prefixes, and claim guidance in one searchable resource hub.
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