CPT Code 90999: Unlisted Dialysis Procedure, Inpatient or Outpatient

Use CPT code 90999 only when the dialysis-related procedure or service performed is not described adequately by any existing dialysis-specific CPT codes.

Yes, typically prior authorization is required due to the unspecified nature of the procedure. Always verify payer-specific rules before billing.

Payment for CPT 90999 depends entirely on submitted clinical documentation and comparative analysis with similar dialysis codes. Payers individually review claims to establish appropriate reimbursement.