Which type of claims must nonparticipating providers file according to Medicare Part B rules?

Nonparticipating providers are required to file all claims according to Medicare Part B rules. This includes submitting claims for both assigned and unassigned services. When a nonparticipating provider performs services for a Medicare beneficiary, they must submit a claim to ensure that the beneficiary can receive any potential reimbursement for covered services.

Medicare assigns a specific allowed amount for each covered service, regardless of whether the provider is participating or nonparticipating. Nonparticipating providers are not bound by the same rules that participating providers follow regarding acceptance of the Medicare-approved amount; however, they still must submit claims to Medicare to facilitate potential reimbursements for their patients. By filing all claims, nonparticipating providers ensure that beneficiaries receive the benefits to which they are entitled under Medicare Part B.

In contrast, other choices focus on limitations regarding the types of services or claims being filed, which do not accurately represent the requirement for nonparticipating providers to submit claims for all services rendered to Medicare patients.