CMRS study materials
CMRS study resources

CMRS (ACAC) cheat sheet

CMRS · Keep the key ideas within reach.

Quick reference

Medical Record Review Fundamentals and Documentation Standards

  • A complete medical record contains patient identification, consent, history, physical, progress notes, orders, test results, and discharge summary.

  • The SOAP note format organizes documentation into Subjective, Objective, Assessment, and Plan.

  • Documentation must be legible, dated, timed, and authenticated by the author with a signature or unique identifier.

  • Late entries are permitted if clearly labeled as late and dated with the actual date of entry.

  • The medical record is a legal document; alterations must be made via addendum, never by obliterating original text.

  • Reviewers must verify that each service billed has a corresponding order and documented result.

  • A problem list provides a longitudinal summary of the patient's active and resolved diagnoses.

  • Documentation standards require that the reason for each encounter be explicitly stated.

  • Electronic health records must maintain an audit trail showing who accessed or modified the record and when.

Quick reference

Coding and Reimbursement Compliance Review

  • ICD-10-CM codes identify diagnoses; ICD-10-PCS codes identify inpatient procedures; CPT codes identify outpatient services and procedures.

  • E/M code selection depends on medical decision making or time, per the current CPT guidelines.

  • The physician query process is used when documentation is ambiguous, inconsistent, or incomplete for code assignment.

  • Principal diagnosis is the condition established after study to be chiefly responsible for the admission.

  • Present on admission (POA) indicators must be reported for all inpatient diagnoses.

  • Modifier 25 indicates a significant, separately identifiable E/M service on the same day as a procedure.

  • Bundling edits (NCCI) identify code pairs that should not be billed together without an appropriate modifier.

  • Medical necessity must support the code level selected; upcoding occurs when a higher level is billed without documentation support.

Quick reference

Clinical Documentation Integrity and Medical Necessity

  • Clinical documentation integrity (CDI) programs seek to ensure documentation is complete, accurate, and reflective of the patient's clinical status.

  • Medical necessity is the determination that a service is reasonable and necessary for the diagnosis or treatment of illness or injury.

  • A query should be non-leading, include clinical indicators, and offer multiple-choice options when possible.

  • Documentation of clinical indicators (vital signs, lab results, imaging) supports the diagnosis and code assignment.

  • Hierarchy of diagnoses (principal, secondary, and comorbidity) must be supported by provider documentation.

  • CDI specialists review records concurrently or retrospectively to identify documentation gaps and query providers.

  • Medical necessity denials often arise from missing documentation of the reason for the encounter or the service performed.

  • Severity of illness and risk of mortality are reflected in the documented diagnoses and affect quality metrics.

Quick reference

Regulatory and Payer Compliance Requirements

  • The False Claims Act prohibits knowingly submitting false or fraudulent claims to government payers.

  • The Anti-Kickback Statute prohibits offering or receiving remuneration to induce referrals for federally reimbursed services.

  • The Stark Law restricts physician self-referrals for designated health services paid by Medicare.

  • HIPAA Privacy Rule governs the use and disclosure of protected health information (PHI).

  • The HITECH Act strengthened HIPAA enforcement and introduced breach notification requirements.

  • Recovery Audit Contractors (RACs) review claims for overpayments and underpayments.

  • Medicare Advantage plans are subject to risk adjustment coding rules and RADV audits.

  • The 60-day overpayment rule requires providers to report and return identified overpayments within 60 days.

  • Compliance programs should include written policies, training, monitoring, and a reporting mechanism.

Quick reference

Audit Methodology, Sampling, and Data Analysis

  • A statistically valid random sample allows extrapolation of error rates to the population.

  • Sample size calculation considers confidence level, margin of error, and expected error rate.

  • The audit universe is the total set of claims or records from which a sample is drawn.

  • A stratified sample divides the population into subgroups to ensure representation of high-risk areas.

  • Data mining uses queries and analytics to identify outliers, patterns, and potential billing anomalies.

  • An audit finding must be supported by documentation evidence and a clear rationale.

  • Error rate = (number of claims with errors / total claims audited) × 100.

  • Root cause analysis identifies the underlying reason for a compliance deficiency.

Quick reference

Fraud, Waste, and Abuse Detection and Prevention

  • Fraud is intentional deception or misrepresentation that the individual knows to be false.

  • Waste is the overutilization of services or other practices that result in unnecessary costs.

  • Abuse includes practices that are inconsistent with accepted medical or business practices and result in unnecessary cost.

  • Red flags for fraud include unbundling, upcoding, billing for services not rendered, and duplicate claims.

  • The OIG Work Plan outlines areas of focus for audits and investigations.

  • Whistleblower protections under the False Claims Act allow qui tam actions and provide anti-retaliation safeguards.

  • A compliance hotline is a confidential reporting mechanism for potential fraud, waste, or abuse.

  • Providers must screen employees and contractors against the OIG exclusion list.

Quick reference

Audit Reporting, Corrective Action Plans, and Communication

  • An audit report should include scope, methodology, findings, and recommendations.

  • A corrective action plan (CAP) must specify the issue, corrective steps, responsible parties, and timeline.

  • Findings should be communicated to the audited entity in a timely manner to allow response and correction.

  • Follow-up audits verify that corrective actions have been implemented and are effective.

  • Reports should distinguish between errors that are isolated and those that are systemic.

  • Clear, objective language should be used in audit reports; avoid accusatory or speculative statements.

  • The CAP should include measurable outcomes to track improvement.

  • Communication of audit results must comply with confidentiality and legal privilege considerations.

Quick reference

Ethics, Confidentiality, and Professional Conduct

  • The minimum necessary standard limits PHI access and disclosure to the amount needed to accomplish the purpose.

  • Reviewers must not access PHI of patients not related to their assigned work.

  • A conflict of interest exists when a reviewer has a personal or financial interest in the audit outcome.

  • Professional conduct requires objectivity, integrity, and adherence to applicable laws and standards.

  • Confidentiality agreements and HIPAA training are required for workforce members with PHI access.

  • Breach notification is required when unsecured PHI is impermissibly accessed or disclosed.

  • Ethical review practices prohibit altering documentation or influencing coding decisions without clinical support.

  • Auditors should maintain independence and avoid auditing their own work or areas where they have responsibility.