MedlinePlus Connect Web Service for EHR Code Mapping

A web service from the U.S. Department of Health & Human Services that maps clinical codes to consumer health information. It matches ICD-9-CM or SNOMED CT codes to MedlinePlus content, LOINC codes to lab test information, and NDC, RXCUI, or text strings to medication data. The service was last updated in September 2025.

Use Cases

• Integrate ICD-9-CM or SNOMED CT code mappings into EHR systems to provide patients with relevant MedlinePlus educational content.
• Use LOINC code matches to automatically retrieve and display authoritative information on lab tests within patient portals.
• Link medication data via NDC or RXCUI codes to patient-facing drug information resources for improved medication education.
• Enable text string matching for medication names to surface related patient health information from MedlinePlus.gov.

Strengths

• Provides authoritative health information from the U.S. government's MedlinePlus resource.
• Supports multiple major clinical code standards including ICD-9-CM, SNOMED CT, LOINC, NDC, and RXCUI.
• Service was updated in September 2025, indicating recent maintenance.

Limitations

• Data volume, row count, and specific column structure are unknown, limiting assessment of analytical scope.
• Primary format is HTML, which may require parsing for structured integration compared to a direct API or data file.
• License is specified as 'other-license-specified', requiring careful review for usage rights.

Provenance

Source

U.S. Department of Health & Human Services

Collection Method

Web service providing mappings between clinical code sets and MedlinePlus content.

Time Range

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Freshness

Last updated on 2025-09-07.

Geography

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