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ACDIS CCDS-O study materials
ACDIS CCDS-O study resources

ACDIS CCDS-O: Outpatient CDI in Physician Practices

ACDIS CCDS-O · Work through your exam, one topic at a time.

All guide sections

Outpatient CDI in Physician Practices

Outpatient CDI in physician practices focuses on the ambulatory record as the source for professional E/M levels, diagnosis coding, risk adjustment, and quality reporting. The exam tests whether you can spot undocumented specificity, support HCCs with MEAT, apply the 2021 office/outpatient E/M rules, and query without leading the provider.

Core rules and concepts

  • Capture every chronic condition addressed at the encounter, not just the presenting problem. MEAT-monitor, evaluate, assess, treat-is the practical test: labs ordered, medication adjusted, status reviewed, or a plan documented can support capture.
  • HCCs depend on ICD-10-CM specificity: type 1 versus type 2 diabetes and its complications, systolic versus diastolic heart failure, COPD with acute exacerbation, CKD stage, and linkage terms such as “due to” or “with.”
  • The problem list is not a billing document; it must match the assessment. “History of” is not active disease.
  • For E/M, the 2021 office/outpatient guidelines allow medical decision making (number and complexity of problems, data reviewed, risk) or total time on the date of the encounter. The note must make the chosen level defensible.

Worked example

A 68-year-old is seen for follow-up. The note says “DM with complications, renal insufficiency.” The problem list adds “CKD.” The provider documents no type of diabetes, no complication, no CKD stage, and no linkage. A compliant query asks whether the diabetes is type 1 or type 2, whether diabetic peripheral neuropathy or nephropathy is present, and whether the CKD stage is documented. The provider responds: “Type 2 diabetes with diabetic peripheral neuropathy and stage 4 CKD due to diabetes.” The record now supports E11.42, E11.22, and N18.4 with linkage, plus HCC capture. Without the stage, “renal insufficiency” cannot be coded as CKD.

Traps that cost marks

  • Assigning an HCC from the problem list when the condition was not assessed or treated.
  • Treating “history of” as active disease.
  • Cloning a prior note without current MEAT.
  • Omitting causal linkage between diabetes and CKD or neuropathy.
  • Writing a query that names the answer instead of asking for clarification.