ACDIS CCDS-O Practice Test Questions Answers

In HCC risk adjustment, chronic kidney disease (CKD) is captured by stage-based HCCs that are hierarchical—only the highest supported CKD stage in the hierarchy is counted for RAF when multiple stages (or a range) are referenced. The documentation includes “CKD – stage 3–4,” which indicates the patient’s baseline CKD severity falls somewhere between stage 3 and stage 4. When selecting from the provided table, stage 4 maps to HCC 327 and is higher than stage 3 categories (HCC 328 for stage 3B and HCC 329 for stage 3 except 3B). AKI due to ATN describes an acute process and does not replace the need to capture baseline CKD stage when it is clinically relevant and documented. Outpatient CDI best practice would be to query the provider to specify the exact CKD stage (since “3–4” is imprecise), but when forced to choose from the hierarchy shown, the correct HCC assignment based on the highest stated stage in the documented range is HCC 327 (CKD stage 4).

In obstetric and postpartum coding, the most important clarification is thetype/timingof hypertension because ICD-10-CM has distinct categories for chronic (pre-existing) hypertension, gestational hypertension, and hypertensive disorders that persist into or present during the postpartum period. At 6 weeks postpartum with elevated readings (including a systolic of 160) and headache, the documentation “hypertension” is not specific enough to determine whether this represents chronic hypertension that predates pregnancy, gestational hypertension that has not resolved, or another pregnancy-related hypertensive disorder requiring different obstetric coding and follow-up. ACDIS outpatient CDI guidance prioritizes queries that resolve coding-impactful ambiguity using clinically supported options without leading the provider. While postpartum preeclampsia could be a clinical consideration, the note does not provide key supporting elements (e.g., proteinuria or other definitive severe-feature criteria), so jumping directly to preeclampsia/eclampsia is less appropriate than clarifying onset and relationship to pregnancy. Linking hypertension to smoking is not a standard required linkage for diagnosis coding, and “hypertensive crisis” is not supported by the documentation provided.

The CMS-HCC model is arisk adjustmentmethodology used primarily to setcapitated paymentsfor Medicare Advantage (MA) organizations based on the expected cost of caring for their enrolled beneficiaries. Under this approach, CMS calculates a Risk Adjustment Factor (RAF) for each member using demographic variables (such as age/sex and certain entitlement factors) plus disease burden captured from ICD-10-CM diagnoses that map to Hierarchical Condition Categories (HCCs). The resulting RAF increases or decreases the plan’s payment to better match predicted healthcare needs—higher RAF for sicker, more complex patients and lower RAF for healthier patients. ACDIS outpatient CDI education emphasizes that the purpose is not physician reimbursement based on a “principal diagnosis” (an inpatient concept) and not payment distribution tied directly to quality performance (that aligns more with MIPS/VBP frameworks). It also does not adjust capitation payments specifically “to physicians,” nor does it exclude advanced practice providers in the way described. The correct use is todetermine MA plan capitation paymentsthrough risk-adjusted member-level projections.

In MSSP-style ACO financial reconciliation, performance is evaluated against a benchmark (expected costs). Here, the ACO’s actual spending ($52M) exceeds the expected benchmark ($50M) by $2M, meaning the ACO generatedshared lossesrather than savings. In risk-bearing ACO arrangements, when costs exceed the benchmark and the ACO is in a track that includes downside risk, the organization may owe CMS a portion of those losses. The shared savings/loss rate (50% in this scenario) represents the percentage of the difference from the benchmark that the ACO shares with CMS, assuming applicable thresholds are met. Thus, instead of receiving a shared savings payment, the ACO would be accountable topay backa share of the excess spending (conceptually 50% of the $2M overage, if all model requirements are satisfied). Option D is not correct because reconciliation is typically performed on a performance-year basis rather than only at the end of the full agreement period, and option C is not how MSSP eligibility works.

In outpatient CDI and coding education, selecting the correct E/M code starts with identifying theencounter category(e.g., office/outpatient vs inpatient/observation vs ED) and whether the patient isnew or established, because these define the applicable CPT code range. Next, thelevel of serviceis selected within that range based on the documentation supporting the required elements for that code family. For most E/M services, “site of service” (place/setting) and “new vs established” are foundational code-selection drivers, while “level” is determined by the record’s support for the applicable leveling methodology (commonly medical decision making and, when allowed/appropriate, time). Time can be a valid leveling method for many office/outpatient E/M visits, but it is not universally the basis for the majority of E/M services across all categories; it is an alternative pathway when documentation supports it. Physician specialty and patient age do not define the majority of E/M code selection. Therefore, the best overall statement is new/established status + site of service + level of service.