Skip to main content
curl -X GET "https://api.omophub.com/v1/vocabularies/domains" \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "success": true,
  "data": {
    "domains": [
      {
        "domain_id": "Condition",
        "domain_name": "Condition",
        "description": "OHDSI standard domain: Condition"
      },
      {
        "domain_id": "Drug",
        "domain_name": "Drug",
        "description": "OHDSI standard domain: Drug"
      },
      {
        "domain_id": "Procedure",
        "domain_name": "Procedure",
        "description": "OHDSI standard domain: Procedure"
      },
      {
        "domain_id": "Measurement",
        "domain_name": "Measurement",
        "description": "OHDSI standard domain: Measurement"
      },
      {
        "domain_id": "Observation",
        "domain_name": "Observation",
        "description": "OHDSI standard domain: Observation"
      },
      {
        "domain_id": "Device",
        "domain_name": "Device",
        "description": "OHDSI standard domain: Device"
      },
      {
        "domain_id": "Specimen",
        "domain_name": "Specimen",
        "description": "OHDSI standard domain: Specimen"
      },
      {
        "domain_id": "Visit",
        "domain_name": "Visit",
        "description": "OHDSI standard domain: Visit"
      }
    ]
  },
  "meta": {
    "request_id": "req_abc123def456",
    "timestamp": "2025-01-05T10:30:00Z",
    "vocab_release": "2025.1"
  }
}
Retrieve the list of standard OHDSI domains. Domains categorize concepts by their clinical or administrative function (e.g., Condition, Drug, Procedure).

​
Query Parameters

​
vocab_release
string
Specific vocabulary release version to use. If not provided, uses the latest available release.
Format: YYYY.Q (e.g., 2025.1)

​
Response

​
success
boolean
Indicates if the request was successful.
​
data
object
​
meta
object
curl -X GET "https://api.omophub.com/v1/vocabularies/domains" \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "success": true,
  "data": {
    "domains": [
      {
        "domain_id": "Condition",
        "domain_name": "Condition",
        "description": "OHDSI standard domain: Condition"
      },
      {
        "domain_id": "Drug",
        "domain_name": "Drug",
        "description": "OHDSI standard domain: Drug"
      },
      {
        "domain_id": "Procedure",
        "domain_name": "Procedure",
        "description": "OHDSI standard domain: Procedure"
      },
      {
        "domain_id": "Measurement",
        "domain_name": "Measurement",
        "description": "OHDSI standard domain: Measurement"
      },
      {
        "domain_id": "Observation",
        "domain_name": "Observation",
        "description": "OHDSI standard domain: Observation"
      },
      {
        "domain_id": "Device",
        "domain_name": "Device",
        "description": "OHDSI standard domain: Device"
      },
      {
        "domain_id": "Specimen",
        "domain_name": "Specimen",
        "description": "OHDSI standard domain: Specimen"
      },
      {
        "domain_id": "Visit",
        "domain_name": "Visit",
        "description": "OHDSI standard domain: Visit"
      }
    ]
  },
  "meta": {
    "request_id": "req_abc123def456",
    "timestamp": "2025-01-05T10:30:00Z",
    "vocab_release": "2025.1"
  }
}

​
Available Domains

The endpoint returns all standard OHDSI domains:

​
Clinical Domains

  • Condition - Diseases, disorders, and clinical findings
  • Procedure - Medical procedures and interventions
  • Observation - Clinical observations and assessments
  • Measurement - Quantitative test results and vital signs
  • Drug - Medications and pharmaceutical products
  • Device - Medical devices and equipment
  • Specimen - Biological specimens and samples

​
Administrative Domains

  • Visit - Healthcare encounters and visit types
  • Provider - Healthcare provider roles and specialties
  • Location - Geographic locations
  • Care Site - Healthcare facilities
  • Payer - Insurance and payment-related concepts
  • Plan - Insurance plans
  • Sponsor - Study sponsors
  • Cost - Healthcare cost information
  • Revenue - Revenue codes

​
Other Domains

  • Episode - Clinical episodes
  • Regimen - Treatment regimens
  • Metadata - Vocabulary metadata
  • Type Concept - Type concepts
  • Relationship - Relationship types
  • Gender - Gender concepts
  • Race - Race concepts
  • Ethnicity - Ethnicity concepts