Particle Health API offers access to health records for over 250 million unique patients across the U.S. The API is compliant to FHIR and C-CDA standards and operates in a HIPAA compliant manner. For C-CDA operations, POST patient demographics and retrieve query status. For FHIR operations, POST person and queries and retrieve searches based on parameters. Registration is required for API use and documentation. Particle Health's API is capable of screening patients for co-morbidities associated with Coronavirus infection.