A third reason for denied claims is missing or incorrect information. This means that the claim does not contain all the necessary data or documentation to support the service provided, or that the data or documentation is inaccurate or inconsistent. Missing or incorrect information can include the patient's name, date of birth, address, insurance ID number, provider's name, NPI number, signature, date of service, place of service, referral or authorization number, medical records, or other supporting documents. To prevent this, providers should collect and verify all the relevant information from the patient and the insurer at every point of contact, and ensure that their claims are complete and accurate before submitting them. Providers should also keep copies of all the documents and records related to their claims, and respond promptly to any requests for additional information from the insurers.