ACDIS Certified Clinical Documentation Specialist-Outpatient CCDS-O Exam Questions

Answer : B

ICD-10-CM diagnosis code assignment in the outpatient setting is governed primarily by the ICD-10-CM Official Guidelines for Coding and Reporting sections applicable to outpatient services. Outpatient rules differ from inpatient because there is no ''principal diagnosis'' established ''after study'' for an admission; instead, outpatient coding generally relies on the reason for the encounter and the conditions evaluated/managed that day, including documented chronic conditions that meet reporting criteria (often framed operationally as MEAT: monitor, evaluate, assess/address, treat). UHDDS is an inpatient discharge dataset concept used to define principal diagnosis and other inpatient reporting constructs, not the outpatient foundation. CPT guidelines govern procedure coding, not diagnosis coding; while CPT and ICD-10-CM must be consistent, CPT guidance does not replace ICD-10-CM outpatient diagnostic rules. From an outpatient CDI perspective, this is why documentation must clearly support encounter diagnoses, their status (active vs history), specificity (type, acuity, manifestations), and medical necessity for services rendered---so the outpatient ICD-10-CM guidelines can be applied correctly and consistently.

Answer : B

CMS-HCC risk adjustment assigns a baseline coefficient (weight) to each qualifying HCC condition, but certain combinations of conditions can increase predicted cost beyond what would be expected by simply adding the two individual weights. These added increments are captured through disease interaction factors, which apply when specific conditions coexist (for example, diabetes with certain severe complications, or other paired conditions defined by the model). In outpatient CDI, this is why documentation must clearly support both diagnoses---each must be clinically evaluated/managed and meet reporting rules---because accurately capturing the interacting conditions can legitimately increase the beneficiary's risk score. By contrast, hierarchies are designed to prevent double-counting within related condition families (the more severe manifestation typically supersedes a less severe one), which often limits---not adds---separate weights. Resource-based relative values and conversion factors belong to physician fee schedule payment methodology for services/procedures (RVUs and payment conversion), not HCC risk score calculation. Therefore, disease interactions are the correct concept that adds risk score weight beyond individual HCC coefficients.

Answer : B

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 generated shared losses rather 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 to pay back a 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.

Answer : C

Under the CMS-HCC risk adjustment methodology, the RAF is calculated primarily from two categories of inputs: (1) demographic/enrollment eligibility factors and (2) diagnosis codes that map to HCCs based on documented, reportable conditions. Eligibility status matters because Medicare models differentiate beneficiaries by factors such as aged versus disabled status and other enrollment characteristics that affect expected cost. The second major driver is the set of valid, supported ICD-10-CM codes reported for the beneficiary during the data collection period; only certain chronic, clinically significant conditions map to HCCs, and they must be documented as active and applicable to the encounter and coded correctly. In ambulatory CDI, this is why accurate condition capture, specificity, and linkage (e.g., cause/manifestation relationships) are emphasized---because reported conditions directly affect the patient's risk profile and the expected cost benchmark. By contrast, income status is not a standard CMS-HCC input, ''previous risk score'' is not itself an input variable, and utilization outcomes like cost of care or readmissions are not used to compute RAF (they may be evaluated separately in quality/cost programs).

Answer : A

In outpatient CDI, ''pre-visit'' or prospective preparation focuses on chronic, clinically significant conditions that are likely to remain active and that should be reassessed and documented with clear MEAT support (monitor, evaluate, assess/address, treat) during the upcoming encounter. Epilepsy, chronic heart failure, and Crohn's disease are all long-term conditions that commonly require ongoing medication management, monitoring, and periodic reassessment, making them strong candidates for reminder/education to ensure the provider documents current status (controlled vs uncontrolled, exacerbation, complications, and treatment plan). This also supports accurate risk adjustment because chronic conditions with ongoing impact are the ones expected to be recaptured when addressed. In contrast, option C includes ''family history,'' which is not a current active condition for risk adjustment, and options D includes acute/self-limited problems (syncope episode, pharyngitis) that are less appropriate as pre-visit chronic-condition prompts. Option B mixes chronic disease with items that may be historical or encounter-specific (compression fracture timing/status), making it less consistently targetable than option A.

Answer : C

Outpatient CDI practice supports accurate, provider-validated diagnoses; CDI should not ''diagnose,'' direct the provider to add a specific condition, or independently add diagnoses to the claim. Here, the documentation shows clinical indicators (fatigue/lethargy and hemoglobin drop from 10.4 to 8.6) and a treatment plan (oral iron and repeat H/H), but the provider has not stated a definitive diagnosis such as postoperative anemia, iron deficiency anemia, acute blood loss anemia, or anemia due to chronic disease. The best CDI action is to issue a compliant query that summarizes the relevant indicators and treatment and asks the provider to document the appropriate diagnosis and etiology, if clinically supported, and to link it to the plan of care. Option A is inappropriate because it leads the provider toward a specific diagnosis. Option D is noncompliant because coding must follow documented provider diagnoses. Option B may be a reasonable internal check, but it does not resolve the documentation gap.

Answer : A

In outpatient CDI and coding guidance, an ''uncertain diagnosis'' is identified by wording that indicates the provider has not confirmed the condition (e.g., possible, probable, suspected, rule out, question of, concern for). These terms reflect diagnostic consideration rather than an established diagnosis. Option A uses the phrase ''concern for,'' which is a classic uncertainty qualifier and signals the provider is considering streptococcal pneumonia but has not definitively diagnosed it. In contrast, options B and D describe active treatment ''for streptococcal pneumonia,'' which implies the provider is managing the condition as a working diagnosis; however, in outpatient coding, treatment alone does not automatically make a diagnosis confirmed if the documentation still reflects uncertainty---CDI would look for explicit provider confirmation. Option C (''evidence of'') generally suggests supportive findings and is commonly interpreted as stronger than ''concern for,'' though CDI would still assess whether the provider has clearly stated a confirmed diagnosis in the assessment/plan. Therefore, the clearest uncertain descriptor is ''concern for.''