Denial Code CO197- Pre-Auth Not Found

Denial-Code-CO197-Authorization-Not-Found

Denial code CO 197 defines in Medical Billing as “Pre-Authorization/Pre-certification/notification missing”. In revenue cycle management or Medical Billing when patient get treatment from from a doctor or provider or from hospital, in some case patient should need prior approval before the treatment. If that approval is not provided with claim, then claim denied due to … Read more

Denial Code CO97 – Bundled

Denial Code CO97- Bundled

Denial code CO 97 defines in Medical Billing or RCM as services performed denied due to bundled with another services so not paid separately. Denial Code CO-97 means “Bundled or included in the payment for another service/procedure already adjudicated.” Reason for Claim denied as Bundled: Incorrect Modifier: This is very common reason for getting denial … Read more

Denial Code CO50 – Not Medically Necessity

Denial Code CO50 means in Medical Billing is “Non-covered services because this is not deemed a ‘medical necessity’ by the payer.” Means as per insurance, provided services patient are not medically necessary for. CO 50 denial is an common reason and frequent denial, there are some specific reasons for getting denial code CO-50 mentioned below, … Read more

Denial Code CO31- Patient Can’t be Identified

Denial code CO-31 means in medical billing, “patient is not identified as insured”. Insurance company denied some claims due to denial code CO 31, as they are not able to match the patient information same as their records and submitted claim. CO 31 Denial Code explanation – “The patient is can’t be identified as our … Read more

Denial Code CO29 – Timely Filing Limit Expired

Denial Code CO29 in USA healthcare means “Timely Filing Limit Has Been Expired” or in short “TFL Expired”. Timely filing denial is also a common denial in medical billing and coding. If any policy holder got medical services or treatment, he/she should file the claim to insurance company within a specific time limit which counted … Read more

Denial Code CO22 Description (2026)

CO-22 Denial Code meaning in USA Medical Billing is “Covered by Another Payer”, actually CO22 denied code means patients COB- Coordination of benefit information is not updated. In this article we discussed in detailed way on this denial code CO22. What is Co-ordination of Benefit in Medical Billing? Coordination of benefits (COB) means patient has … Read more

Denial Code CO27 – Coverage Terminated

Denial Code CO27 is an important and commonly used denial code. CO 27 denial code means patient insurance coverage is terminated on date of service (DOS). It means patient insurance policy is no longer active on DOS. If insurance is not active on Date of service, means claim should not be paid. CO 27 Denial … Read more

Denial Code CO18 Meaning

In Revenue Cycle Management, there are multiple reasons when insurance companies denied the claim. CO-18 is one of the primary denial reason and claims frequently denied due to this reason as duplicate claim. Denial Code CO18 meaning is exact duplicate claim, means claim is already paid or submitted twice by the insurer, provider or hospital. … Read more

CO 16 Denial Code Description (2026)

Denial Code CO-16 stand in RCM process as “Lack Information”. In Revenue Cycle Management denials are important part of any claim and handling the denial effectively is necessary as compare to billing and processing the claims. When claim is denied CO 16 Denial Code Description means needed some more information by the payer or insurance … Read more