Free CCDS Exam Flashcards

Under 42 CFR 412.3(d), inpatient admission is generally appropriate for Medicare Part A when the admitting practitioner expects medically necessary hospital care crossing two midnights, and the record documents why. Shorter expected stays are usually outpatient/observation unless an inpatient-only procedure or documented case-by-case judgment applies.

Medicare pays hospitals a fixed amount per Medicare Severity Diagnosis-Related Group (MS-DRG), based on the principal diagnosis, procedures, and secondary diagnoses (CCs/MCCs) — not on the itemized cost of the actual stay.

A complication/comorbidity (CC) or major complication/comorbidity (MCC) is a secondary diagnosis CMS classifies as adding resource intensity. An MCC reflects greater severity than a CC and can move a case into a higher-paying MS-DRG tier.

A hospital's average MS-DRG relative weight across its Medicare discharges for a period. CDI programs track CMI trends to gauge whether documentation is capturing true severity — a rising CMI still needs a clinical-support check, not just a celebration.

A CMS contractor paid to identify improper Medicare payments, including DRG-level overpayments from unsupported CC/MCC capture. RA findings are a key driver of CDI compliance auditing and denial defense work.

CMS updates MS-DRGs, relative weights, and payment rates through the annual Inpatient Prospective Payment System (IPPS) final rule, effective every October 1. CDI programs must refresh grouper logic and staff training each cycle.

Sepsis-2 flags sepsis from two or more SIRS criteria plus a suspected infection source. Sepsis-3 instead requires infection plus an acute rise of two or more points in the SOFA score, reflecting organ dysfunction — many payers now expect Sepsis-3/SOFA support.

Acute kidney injury Stage 1 is met by a serum creatinine rise of 0.3 mg/dL or more within 48 hours, OR a rise to 1.5-1.9x baseline within 7 days, OR urine output under 0.5 mL/kg/hr for 6-12 hours — any single criterion is sufficient.

Clinical validation typically looks for a PaO2 under 60 mmHg or SpO2 under about 91% on room air (or a P/F ratio under 300 on oxygen), plus signs of respiratory distress and treatment such as supplemental oxygen or ventilatory support.

Supported by a PaCO2 over 50 mmHg with an arterial pH under 7.35, reflecting acute respiratory acidosis from impaired ventilation (for example, a COPD exacerbation) rather than impaired oxygenation alone.

Malnutrition is supported when at least 2 of 6 characteristics are present: inadequate energy intake, weight loss, muscle loss, subcutaneous fat loss, fluid accumulation, or reduced grip strength — evaluated in the context of acute illness, chronic illness, or social/environmental circumstances.

An acute, usually reversible change in mental status caused by a systemic derangement (infection, drug effect, organ failure) rather than a primary brain lesion. CDI should query for the specific type and etiology rather than accepting unspecified 'altered mental status.'

Heart failure with reduced ejection fraction (HFrEF, roughly 40% or less) reflects a pumping problem; heart failure with preserved ejection fraction (HFpEF, EF 50% or more) reflects a stiff, poorly relaxing ventricle despite a near-normal EF. Documentation needs both the type and the acuity.

Meeting two or more SIRS criteria (abnormal temperature, tachycardia, tachypnea, abnormal WBC) does not equal sepsis unless an infection source is documented or clinically supported — trauma, pancreatitis, and burns can all trigger SIRS non-infectiously.

A drug ordered for a condition can support a diagnosis even without an explicit written diagnosis nearby — for example, a vasopressor infusion can indicate shock. CDI still needs a provider to document the underlying condition before it can be coded.

The same abbreviation can mean different things in different notes (for example, 'MS' as multiple sclerosis, mitral stenosis, or morphine sulfate). Confirm meaning from surrounding clinical context before treating an abbreviation as a clinical indicator.

A compliant query is nonleading, cites the clinical indicators supporting it, excludes any reference to reimbursement or quality outcomes, and lets the provider apply independent clinical judgment to answer.

Every multiple-choice query needs at least one answer option clinically supported by the record, plus an open option such as 'Other, please specify.' There's no required minimum number of choices, but irrelevant options must be excluded and none may be visually emphasized.

Yes/no is for: POA status (must also offer 'unable to determine'), substantiating a diagnosis already in provider documentation (e.g., pathology or radiology), or establishing/negating cause-and-effect between documented conditions. Never use it for a new diagnosis — including one noted only by a dietitian or wound nurse.

'Unable to determine' means the provider is clinically unable to reach a conclusion because the data are insufficient. The query brief says it is not synonymous with 'unable to rule out' or with uncertain terms such as 'possible' or 'probable.'

A spoken or messaged query must still present sourced clinical indicators, a nonleading question, and any answer options, and be logged (date/time, people, response) like a written query. The provider must document the answer in the permanent health record — an undocumented verbal answer can't be coded.

The process of checking that a documented diagnosis is actually supported by clinical indicators in the record. A diagnosis can be coded exactly as written yet still trigger a clinical validation query if the supporting evidence looks thin.

Systematically scanning prior encounters for diagnoses to import into the current record — without any current-encounter clinical trigger — is noncompliant. Reviewing prior data for context is fine once something in the current record prompts that look-back.

Sending more than one query isn't itself noncompliant. What matters is intent and pattern — repeating the same or a similar query to pressure a provider toward a preferred answer is the violation, not the raw count of queries sent.

Any physician or other qualified healthcare professional who is legally accountable for establishing the patient's diagnosis — not only the attending. A consulting specialist can be a valid query recipient for findings within their own documentation.

A concurrent query happens while the patient is still admitted, so the provider can answer before discharge. A retrospective query happens after discharge, working from the closed record, and typically needs a defined response window.

CMI can rise or fall because the hospital's case mix changed — more or fewer surgical, transplant, or cardiac-procedure cases — without any documentation change. Before crediting or blaming CDI, compare medical versus surgical CMI and CC/MCC capture within the same DRG families.

Response rate measures how often a provider answers a query at all. Agreement rate measures how often the provider's answer supports the diagnosis CDI suspected. A high response rate with a low agreement rate signals a different problem than a low response rate.

CMS's Program for Evaluating Payment Patterns Electronic Report compares a hospital's percentages in target areas with national, MAC-jurisdiction, and state percentiles. It is a self-audit tool for prioritizing compliance reviews, not an audit trigger in itself.

CDI programs track their highest-volume MS-DRGs because even small documentation or coding errors in a high-frequency DRG multiply across many claims — a small per-case risk becomes a large program-level financial and compliance exposure.

Effective CDI education frames a query or teaching point around clarifying the record for patient-care and data-quality reasons, not around correcting the physician — protecting the working relationship that keeps future queries getting answered.

The 'working DRG' is the CDI specialist's concurrent estimate based on the chart so far; the 'final coded DRG' is what the coder assigns from the complete, closed record. CDI reconciles the two to catch late documentation or missed queries.

A quick bedside or phone clarification can resolve a simple, time-sensitive question faster than a written query — but it must still be documented and tracked. Complex or disputed clarifications are better handled in writing to preserve a clear record trail.

The CDI specialist typically reviews the record concurrently to support real-time documentation clarity; the coder assigns final codes from the complete record after discharge. Both roles query, but from different points in the record's lifecycle.

The condition established after study to be chiefly responsible for occasioning the patient's admission. It doesn't have to be the admitting diagnosis — it's whatever the completed workup ultimately shows caused the admission.

UHDDS defines other diagnoses as conditions that coexist at admission, develop later, or affect treatment or length of stay. Guidelines Section III reports them only when they require clinical evaluation, therapeutic treatment, diagnostic procedures, extended stay, or increased nursing care/monitoring.

In inpatient admissions to short-term acute, long-term care, and psychiatric hospitals, a diagnosis still 'probable,' 'likely,' or 'suspected' at discharge is coded as if established — except HIV, COVID-19, Zika, and influenza due to certain identified viruses (J09, J10), which need confirmation. Outpatient: code to the highest certainty (signs, symptoms, abnormal findings).

When two or more diagnoses each independently meet the definition of principal diagnosis, either may be sequenced first — unless the Alphabetic Index, Tabular List, or another guideline specifically directs otherwise.

When a patient is admitted specifically because of a complication from surgery or other medical care, that complication — not the original underlying condition — is sequenced as the principal diagnosis.

U ('documentation insufficient') is treated like N for HAC payment purposes — no CC/MCC credit. W ('clinically undetermined,' meaning the provider genuinely can't tell) is treated like Y — CC/MCC credit is still allowed.

The American Hospital Association's Coding Clinic publishes official coding advice that clarifies and supplements the ICD-10-CM/PCS Official Guidelines. CDI and coding staff apply its guidance when a coding question isn't fully resolved by the guidelines alone.

Upcoding drift toward higher-weighted MS-DRGs that the clinical record doesn't support — a long-standing industry term, not an OIG definition. The CCDS outline asks you to spot OIG-flagged risk areas; for example, OIG audits have repeatedly found severe malnutrition codes unsupported by the record.

A query that pushes the provider toward a desired diagnosis, such as stating a conclusion rather than listing supporting clinical indicators, or emphasizing one answer choice. Leading queries are noncompliant regardless of whether the diagnosis turns out to be accurate.

CDI professionals must pursue accurate, complete documentation for its own sake — patient care, data quality, and compliant reimbursement — rather than treating maximized DRG weight or payment as the goal of a query.

Access only records you are assigned to review for CDI purposes, and protect PHI under HIPAA and facility policy in every form (written, verbal, electronic). The ACDIS Code of Ethics gives the example that opening an unassigned hospitalized neighbor's chart is unethical.

CDI programs support compliant DRG assignment by auditing high-risk MS-DRGs and single-CC/MCC cases, validating the clinical indicators behind reported conditions, and tracking query and denial trends. The goal is accurate, complete documentation, not maximum reimbursement.

Severity of Illness (SOI) measures how sick the patient is; Risk of Mortality (ROM) measures how likely the patient is to die. Each is scored 1 (minor) to 4 (extreme), and the two can diverge — acute cholecystitis can show high SOI with low ROM.

AHRQ's 10-indicator patient safety composite (PSI 03, 06, and 08 through 15) that CMS uses in the HAC Reduction Program. Accurate POA reporting keeps a condition present on admission from wrongly counting as a hospital-acquired event.

Two separate CMS programs. The HAC-POA provision withholds CC/MCC credit for listed conditions coded N or U. The HAC Reduction Program cuts Medicare FFS payments 1% for hospitals in the worst-performing quartile on CMS PSI 90 plus five NHSN infection measures.

Public quality measures like 30-day readmission and mortality rates are risk-adjusted using coded diagnosis data. Under-documented comorbidities make a hospital's patients look healthier on paper, removing the risk adjustment that would otherwise protect its quality scores.