What is the difference between 'inadequate documentation' and 'incorrect codes' in claim denials?

• A. They are the same
• B. Inadequate documentation lacks evidence for coding; incorrect codes apply misapplied codes—both can lead to denial
• C. Only incorrect codes matter
• D. Only documentation matters

Answer: (B)

The key idea is that two separate problems can cause denials: not enough evidence in the chart to support the codes, and codes that don’t match what was actually done. Inadequate documentation means the medical record doesn’t provide enough detail to justify the billed services or the chosen codes. Even if a service was performed, without clear, specific notes you can’t substantiate the coding, so the claim can be denied.

Incorrect codes mean the documentation is there, but the codes themselves are wrong for what was performed or documented. This is a coding error, such as selecting a code that implies a more complex service than was actually provided or applying a diagnosis or procedure code that doesn’t align with the chart.

Both issues lead to denial because payers require claims to be both well-documented and accurately coded. So the best answer is that inadequate documentation lacks evidence to support coding, while incorrect codes involve misapplied codes—and both can cause a denial.