Pharmacies owned by companies with health insurers and PBMs comprise a significant share of the Medicare Part D market, or “insurer-PBMs,” meaningfully steered Medicare beneficiaries to their affiliated pharmacies, according to a study published in JAMA Health Forum.
Study Shows ‘Insurer-PBMs’ Dominate Medicare Part D, Steer Patients to Their Pharmacies
An analysis of Medicare Part D and other data found that more than one-third of all pharmacy spending went through pharmacies owned by Cigna, CVS Health, Humana or UnitedHealth Group.

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