According to the Centers for Medicare and Medicaid Services (CMS), what two items must be documented on a patient's claim for reimbursement?

Choice A reason: While ICD-10-CM correctly identifies diagnoses, HCPCS codes are primarily used for billing Medicare Part B services, durable medical equipment, and supplies, which is not the standard for all outpatient claims. Choice B reason: ICD-10-PCS is used mainly for inpatient hospital procedure coding, not outpatient services. Combining it with HCPCS does not reflect routine outpatient claim requirements. Choice C reason: ICD-10-CM codes provide accurate diagnosis documentation, and CPT codes specify the procedures or services performed. CMS requires both for proper claim processing and reimbursement for outpatient services, making this combination the correct answer. Choice D reason: ICD-10-PCS codes are intended for inpatient hospital procedures rather than outpatient billing. CPT codes are correct for procedures, but pairing them with ICD-10-PCS does not meet CMS outpatient documentation requirements.