What are common issues that cause claim denials?

Asked by: Chadrick Nolan  |  Last update: June 27, 2026
Score: 4.1/5 (55 votes)

Common insurance claim denials frequently result from missing or incorrect patient information, lack of medical necessity, duplicate submissions, and coding errors. Addressing these top issues—including ensuring proper prior authorization and submitting claims within timely filing limits—can significantly reduce denied claims and improve revenue cycle management.

What are some common issues that cause claim denials?

Provider credentialing issues, • Non-covered services, per insurance carrier, • Services are found to be medically unnecessary, • Missing referral from primary care physician to specialist when required, • Missing provider data, • Incorrect patient information, and • Incorrect point-of-service code (usually a two-digit ...

What reasons are common for denials?

Denials can result from incomplete information, documentation gaps, coding errors, or payer rules not being followed correctly. For rural and community healthcare providers, denials affect both revenue and staff time—creating ripple effects across the organization.

What are the two main reasons for denying a claim?

Insurers may deny a claim if they believe that the service or treatment was not medically necessary, if the medical documentation does not adequately support the service, or if the claim does not meet their MCG (Milliman) or InterQual criteria.

What are the top 10 denials in medical billing?

The top 10 medical billing denials often stem from preventable administrative and coding errors, with missing information (CO 16), incorrect eligibility (CO 109), and duplicate claims (CO 18) leading the list. Common reasons also include lack of prior authorization (CO 197), non-covered services (PR 96), and late filing (CO 29), which can significantly delay revenue.

What Causes Claim Denials In Medical Billing And Coding? - Clinical Career Path

31 related questions found

What are the 4 types of denial?

The four primary types of denial are denial of fact, minimization, denial of responsibility, and denial of impact, which serve as psychological defense mechanisms to protect individuals from uncomfortable truths. These methods allow people to distort reality, manage stress, or avoid accountability for behaviors such as addiction, abuse, or trauma.

What are the three types of claim denials?

The 5 Most Common Types of Medical Claim Denials:

  • Eligibility issues.
  • Missing or invalid claims data.
  • Authorization issues.
  • Non-covered services.
  • Missing documentation.

What are the 7 types of denial?

Breznitz13 described 7 types of denial (denial of information, denial of threatening information, denial of personal relevance, denial of urgency, denial of vulnerability/responsibility, denial of affect, and denial of affect relevance) related to the quality of denial that surrounds illness.

Which is an example of a common reason for a denied claim?

One of the most frequent examples of a denied claim is missing or incorrect patient information, such as a misspelled name, an incorrect date of birth, or an outdated policy number.

What triggers denial?

Denial reasons in medical billing, often indicated by codes on a remittance advice (RA), explain why an insurance claim was not paid. Common reasons include missing information, lack of medical necessity, prior authorization failures, or patient eligibility issues. These codes help providers identify errors to correct and resubmit claims.

What are the three most common mistakes on a claim that will cause denials?

The three most common mistakes that cause medical claim denials are incorrect patient identification details, lack of prior authorization, and untimely filing.

What is the 80% rule in insurance?

The 80% rule in homeowners insurance dictates that you must insure your dwelling for at least 80% of its total replacement cost to receive full coverage (replacement cost) on claims. If coverage falls below this threshold, insurers may only pay a portion of a partial loss or the actual cash value rather than the cost to rebuild.

What not to say to the insurance adjuster?

Avoid making statements like, “I'm fine,” “It's not that bad,” or “I don't really need to see a doctor.” Insurance adjusters rely on your early descriptions to judge how seriously you are hurt, and any language about your pain not being that bad can be used against you in the future.

What are common reasons for claim denials?

Process Errors

  • The claim has missing or incorrect information. Whether by accident or intentionally, medical billing and coding errors are common reasons that claims are rejected or denied. ...
  • The claim was not filed in a timely manner. ...
  • Failure to respond to communication. ...
  • Policy cancelled for lack of premium payment.

What is the 4 denial code?

Denial code 4 (CO-4 or OA-4) indicates that a procedure code is incompatible with the modifier used, or a required modifier is missing, often falling under [Contractual Obligation] (CO). It frequently signals a coding error where the service rendered requires further clarification (e.g., anatomical location or distinct procedural service) to be processed by the insurer.

What healthcare denies the most claims?

Based on 2023–2024 data, UnitedHealthcare often has the highest claim denial rates among major U.S. insurers, with some reports showing they denied roughly one-third of in-network claims, significantly higher than the industry average. Other insurers with high denial rates include AvMed, Oscar Health, and Cigna.

What is the deadliest form of denial?

Quote by C. Northcote Parkinson: “Delay is the deadliest form of denial.”