A Collaborative Practice Agreement, often abbreviated CPA, is a written agreement between one or more pharmacists and one or more prescribers that spells out the specific clinical functions the pharmacist is authorized to perform for a defined patient population. The agreement itself is a legal instrument — its existence and content are what create the pharmacist’s authority to act beyond routine dispensing, not general professional judgment alone.
The content of a CPA can vary widely: it might address which conditions or drug categories are covered, what monitoring or follow-up is expected, and how the pharmacist and prescriber communicate about shared patients. State boards of pharmacy (often together with medical boards) set the outer boundaries for what a CPA is allowed to authorize, and many states require the agreement to be filed, renewed, or structured in a particular way.
Why it matters
CPAs are the legal foundation underneath many expanded pharmacy practice models, including CDTM programs and some immunization or point-of-care testing services. A pharmacist practicing under a CPA in one state cannot assume the same agreement structure — or the same scope of allowable activity — would be valid in another state, which makes CPA rules a recurring multistate licensing consideration.
This entry describes the general concept, not any specific state’s requirements or any clinical protocol. RxByState tracks CPA rules state by state at https://app.rxbystate.com/signup.