MedlinePlus Connect is a free service that allows health organizations and IT providers to link patient portals and electronic health record (EHR) systems to information from MedlinePlus, NLM’s consumer health website, along with other NIH Institutes.

MedlinePlus Connect responds to requests based on diagnosis (problem) codes, medication codes, laboratory test codes, and medical procedure codes. When an EHR or patient portal submits a code request, MedlinePlus Connect returns a response that includes links to relevant MedlinePlus health information. MedlinePlus Connect can reply with English or Spanish information.

Visit the "How MedlinePlus Connect Works" page for more information.

Code Types	If you send:	MedlinePlus Connect responds with:
Diagnosis (problem) codes:	ICD-9-CM ICD-10-CM SNOMED CT® [1]	MedlinePlus Health Topic Pages, Genetics Pages NCI pages, NEI pages, NIA pages, NIAMS pages, NIDCR pages, NIDDK pages
Medication Codes:	RxCUI (RxNorm Concept Unique Identifier) NDC (National Drug Code)	MedlinePlus Drug Pages (ASHP) MedlinePlus Supplement Pages (NMCD, NCCIH, ODS)
Laboratory Test Codes:	LOINC® (Logical Observation Identifiers Names and Codes)	MedlinePlus Medical Test Pages
Procedure Codes:	CPT® (Current Procedural Terminology) SNOMED CT® [1]	MedlinePlus Health Topic Pages, Medical Test Pages

[1] MedlinePlus Connect coverage of SNOMED CT focuses on CORE Problem List Subset codes (Clinical Observations Recording and Encoding) and their descendants.