Nia’s guidelines for medical specialty solutions services were developed from practice experience, literature reviews, specialty criteria sets and empirical data. Our system provides instant access to much of the prior authorization information that our call center staff provides These medical necessity criteria were developed by national imaging associates, inc (nia) for the purpose of making clinical review determinations for requests for therapies and diagnostic procedures. You have instant access to the imaging authorization and supporting information you need on this site Whether submitting imaging exam requests or checking the status.
Search for resources by solution below Advanced imaging musculoskeletal and surgery radiation oncology physical medicine genetic testing How does the ordering provider obtain a prior authorization from nia for a medical specialty solutions outpatient service What information is required to receive prior authorization? Nia’s guidelines are reviewed yearly and modified when necessary following a literature search of pertinent and established clinical guidelines and accepted diagnostic imaging practices. Clinical guidelines preview 2026 advanced imaging guidelines 2025 advanced imaging guidelines checklists advanced imaging checklist low dose chest ct history form tip.
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