Which code identifies the patient as primary, spouse, or dependent on an insurance plan?

The patient code is the correct choice because it serves the specific purpose of identifying the relationship of the patient to the insured individual on a health insurance plan. This code differentiates whether the patient is the primary insured, a spouse, or a dependent.

In the context of health insurance and billing, accurately identifying the patient's relationship status is crucial for processing claims and ensuring that the correct coverage applies. Each status can have different implications for benefits and coverage limits, making the patient code an essential element in healthcare administration.

The other options do not fulfill this specific identification role. Group codes relate to the overall insurance plan or group, typically used to streamline administrative processes, while the identification (ID) number is unique to the policyholder and does not delineate relationship status. The PCN (Processor Control Number) is used for identifying the specific insurance provider's network or prescription drug plan but also does not indicate the relationship status of the patient.