What are unlinked codes?

What are unlinked codes?

• A. ICD-10 and CPT codes must match
• B. CPT codes must be used for outpatient
• C. ICD-10-CM codes are optional
• D. DRGs must be used for inpatient

Answer: (A)

The concept being tested is the need to pair a procedure code with a supporting diagnosis code so the service is medically justified. Unlinked codes occur when a CPT procedure isn’t tied to an ICD-10-CM diagnosis on the same claim line, making the service appear unsupported. So, the best answer says that ICD-10-CM diagnosis codes and CPT procedure codes must match because the diagnosis provides the reason for the procedure. When the two don’t align, the claim can be denied or flagged for review. For example, billing a procedure like a surgical intervention with a diagnosis that doesn’t justify that procedure would create an unlinked code situation. The other options aren’t about linking codes: ICD-10-CM codes aren’t optional, outpatient services aren’t defined by CPT alone in terms of linkage, and DRGs are a separate inpatient payment system, not the mechanism for linking diagnosis and procedure codes.

The concept being tested is the need to pair a procedure code with a supporting diagnosis code so the service is medically justified. Unlinked codes occur when a CPT procedure isn’t tied to an ICD-10-CM diagnosis on the same claim line, making the service appear unsupported.

So, the best answer says that ICD-10-CM diagnosis codes and CPT procedure codes must match because the diagnosis provides the reason for the procedure. When the two don’t align, the claim can be denied or flagged for review. For example, billing a procedure like a surgical intervention with a diagnosis that doesn’t justify that procedure would create an unlinked code situation.

The other options aren’t about linking codes: ICD-10-CM codes aren’t optional, outpatient services aren’t defined by CPT alone in terms of linkage, and DRGs are a separate inpatient payment system, not the mechanism for linking diagnosis and procedure codes.