Population

The total number of distinct chronic conditions identified for a member based on diagnosis codes appearing in claims during a defined lookback period, used as a comorbidity burden indicator in risk stratification models, case management eligibility determination, and population health segmentation.

A binary flag identifying that a member has at least one qualifying chronic condition based on diagnosis code algorithms applied to claims data, used as a basic eligibility criterion for disease management programs and chronic care management billing under CMS chronic care management codes.

A flag identifying a member with a chronic kidney disease diagnosis based on ICD-10-CM codes in the N18 range, with stage identified by the specific code suffix. CKD is strongly associated with diabetes and hypertension and is a significant driver of Medicare Advantage risk scores through multiple HCC categories tied to different stages of renal impairment.

A code identifying the specific stage of chronic kidney disease for a member, ranging from stage 1 through stage 5 and end-stage renal disease, derived from ICD-10-CM diagnosis codes. CKD stage is a critical field in population health analytics because higher stages carry substantially greater HCC weights and indicate members requiring nephrology care coordination and transplant or dialysis planning.

A flag identifying a member with a chronic obstructive pulmonary disease diagnosis based on ICD-10-CM codes in the J44 range. COPD is a leading cause of hospitalizations and emergency department visits in Medicare populations and is frequently targeted by population health programs focused on reducing preventable acute utilization through inhaler adherence and pulmonary rehabilitation.

A flag corresponding to the HEDIS Colorectal Cancer Screening measure, indicating whether a member aged 45 through 75 has completed an age-appropriate colorectal cancer screening test within the required timeframe, including colonoscopy, flexible sigmoidoscopy, CT colonography, or stool-based tests.

A flag indicating that a member received a visit or interaction from a community health worker, a frontline public health worker who serves as a bridge between healthcare systems and communities, particularly for addressing social determinants of health and supporting chronic disease management in underserved populations.

A flag identifying a member with a congestive heart failure diagnosis based on ICD-10-CM codes in the I50 range. Congestive heart failure is one of the highest-cost chronic conditions in Medicare populations and is a primary focus of care management programs targeting hospital readmission prevention through medication adherence and symptom monitoring.

A flag identifying a member with a coronary artery disease diagnosis based on ICD-10-CM codes in the I20 through I25 range, used in cardiovascular disease population segmentation and as an input to CMS-HCC risk adjustment models where ischemic heart disease categories contribute significantly to RAF scores.

A flag indicating that a member was screened for depression using a validated instrument such as the PHQ-2 or PHQ-9 during a qualifying encounter, corresponding to the HEDIS Depression Screening and Follow-Up measure and increasingly required in annual wellness visits under Medicare.

A flag identifying a member with a diabetes mellitus diagnosis, derived from ICD-10-CM codes in the E10 through E13 range appearing on medical claims or pharmacy claims for antidiabetic medications. Diabetes is one of the most prevalent and costly chronic conditions tracked in population health programs and is a primary driver of HCC risk scores.

The numeric diastolic blood pressure reading in millimeters of mercury from the most recent blood pressure measurement on record for a member, used alongside the systolic value in hypertension management analytics and cardiovascular risk stratification.

The total number of emergency department encounters for a member during a defined measurement period, distinguished from observation stays and inpatient admissions. High ED utilization is a key indicator of unmanaged chronic conditions or inadequate primary care access and is a primary target for population health interventions and value-based contract performance.

A flag identifying a member with end-stage renal disease requiring dialysis or kidney transplantation, the highest severity stage of chronic kidney disease. ESRD members are typically the highest-cost segment in any managed care population and in Medicare carry specific program implications including eligibility for the ESRD Medicare coordination of benefits period.

A flag identifying that a member experienced a documented fall event during the measurement period, based on ICD-10-CM codes, care manager documentation, or health risk assessment reporting. Fall events are tracked as adverse outcome indicators in elderly population management programs.

A flag indicating that a member was screened for fall risk using a validated tool such as the Timed Up and Go test or STEADI algorithm, a key preventive care quality metric for elderly populations where falls are a leading cause of injury, hospitalization, and functional decline.

A flag identifying a member as experiencing food insecurity, defined as limited or uncertain access to adequate food, based on validated screening tools such as the Hunger Vital Sign or ICD-10-CM Z59 codes. Food insecurity is associated with poor glycemic control in diabetic members and is increasingly addressed through food-as-medicine interventions in population health programs.

A flag identifying a member meeting clinical criteria for frailty, a geriatric syndrome characterized by decreased reserve and resistance to stressors resulting from cumulative decline across multiple physiological systems. Frailty identification drives care plan adjustments, fall prevention interventions, and advance care planning conversations in elderly population management.

The total number of health coaching sessions completed by a member as part of a population health wellness or chronic disease management program, used to measure engagement intensity and analyze the dose-response relationship between coaching frequency and health outcome improvements.

A flag identifying a member assessed as having limited health literacy, defined as difficulty understanding health information and navigating the healthcare system, which is associated with poor medication adherence, low preventive care utilization, and higher rates of avoidable hospitalizations in population health analytics.