Inclusion Criteria:  fully insured by Blue Cross Blue Shield of Louisiana (BCBSLA) continuously enrolled in BCBSLA for one year planning to remain a member of BCBSLA for next year English-speaking telephone access aged ≥55 years diagnosis of essential hypertension (ICD-10-CM code I10) currently filling antihypertensive medication low antihypertensive medication refill (proportion of days covered (PDC) <0.8) low self-report adherence (4-item Krousel-Wood Medication Adherence Scale (K-Wood-MAS-4) score ≥1) uncontrolled blood pressure (BP) (systolic BP ≥130 mm Hg or diastolic BP ≥80 mm Hg) desire to improve BP  Exclusion Criteria:  living in a household with someone already enrolled in the study enrollment in another clinical trial for drug adherence or BP control moderate to severe cognitive impairment