Final answer:
The difference between NOS and NEC codes lies in their usage and the information they convey. NOS codes are used when the coding system is not specific enough, while NEC codes are used when the documentation does not provide enough information. It is important for medical coders to understand this distinction for accurate coding and reimbursement.
Step-by-step explanation:
The difference between NOS (Not Otherwise Specified) and NEC (Not Elsewhere Classified) codes lies in their usage and the information they convey.
NOS codes are used when the diagnosis is known but the coding system does not provide a specific enough code. On the other hand, NEC codes are used when the diagnosis is known, but the documentation does not provide enough information to assign a more specific code. This means that NOS codes prompt coders to cross-reference with 'other specified' codes, while NEC codes indicate that the coder has clarified with the physician that a more specific diagnosis is not available.
It is important for medical coders to understand the distinction between NOS and NEC codes to ensure accurate coding and proper reimbursement for medical services.