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Coders must not assign malignancy based only on pathology. Since provider documented “liver lesion,” coder must query to confirm malignant diagnosis. If confirmed, assign C22.0 malignant neoplasm of liver, primary. This ensures compliant oncology reporting and avoids audit risk.

Congestive heart failure requires specification of systolic, diastolic, or combined type to assign accurate ICD-10-CM codes. Coders must not assume type based on EHR data, echo reports, or labs without provider documentation. Option A loses specificity and underreports severity. Option B and D inappropriately introduce diagnoses not documented. The compliant approach is to query the provider, citing evidence (e.g., EF 35%, clinical notes) and requesting clarification. Queries ensure accurate capture for MS-DRG and risk adjustment, as heart failure type impacts comorbidity/MCC designation. A well-structured query should be non-leading, present evidence, and allow the provider to choose “systolic,” “diastolic,” “combined,” or “unspecified.” This upholds coding standards, compliance, and accurate reporting.

System edit checks (also known as validation edits) automatically identify duplicate claim submissions, incorrect formats, or missing data before submission to payers. Data encryption ensures confidentiality but not data accuracy. Physical access controls protect hardware. Audit trails track access but do not prevent duplicates. Edit checks improve claim accuracy, reduce denials, and enhance revenue cycle integrity.

CMS enforces National Coverage Determinations (NCDs) and Local Coverage Determinations (LCDs), which define “reasonable and necessary” services for Medicare payment. Coders must ensure documentation and coding align with these policies to avoid denials. HIPAA governs privacy, Stark addresses self-referrals, and HITECH strengthens ePHI safeguards. Compliance with NCD/LCD ensures coding accuracy and reimbursement integrity.

Audit trails provide accountability, recording who accessed records, when, and what actions were taken. Confidentiality protects privacy, integrity ensures accuracy, and availability ensures access. Accountability safeguards deter inappropriate access and support investigations in case of suspected HIPAA violations.