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curl -X GET "https://api.omophub.com/v1/search/autocomplete?query=diab&page_size=5" \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "suggestions": [
    {
      "concept_id": 201826,
      "concept_name": "Type 2 diabetes mellitus",
      "concept_code": "44054006",
      "vocabulary_id": "SNOMED",
      "domain_id": "Condition",
      "concept_class_id": "Clinical Finding",
      "standard_concept": "S",
      "score": 0.95
    },
    {
      "concept_id": 201254,
      "concept_name": "Type 1 diabetes mellitus",
      "concept_code": "46635009",
      "vocabulary_id": "SNOMED",
      "domain_id": "Condition",
      "concept_class_id": "Clinical Finding",
      "standard_concept": "S",
      "score": 0.92
    },
    {
      "concept_id": 443238,
      "concept_name": "Diabetic retinopathy",
      "concept_code": "4855003",
      "vocabulary_id": "SNOMED",
      "domain_id": "Condition",
      "concept_class_id": "Clinical Finding",
      "standard_concept": "S",
      "score": 0.88
    }
  ],
  "meta": {
    "query": "diab",
    "algorithm": "default",
    "total_suggestions": 3,
    "vocab_release": "2025.2"
  }
}

​
Overview

This endpoint provides autocomplete functionality for medical terminology searches. It offers real-time suggestions as users type, helping them find the correct medical terms quickly. The endpoint supports both standard prefix matching and phonetic (Soundex) matching for handling common misspellings.

​
Query Parameters

​
query
string
required
Search query for autocompletion (minimum 2 characters, maximum 100)
​
vocabulary_ids
string
Filter suggestions to specific vocabularies (comma-separated)
Examples: SNOMED, ICD10CM,LOINC, RXNORM
​
domain_ids
string
Filter suggestions to specific domains (comma-separated)
Examples: Condition, Drug,Procedure
​
page
integer
default:"1"
Page number (1-based indexing)
​
page_size
integer
default:"10"
Number of suggestions to return per page (1-20)
​
algorithm
string
default:"default"
Matching algorithm to use
Options: default, soundex
Use soundex for phonetic matching to handle misspellings
​
vocab_release
string
Specific vocabulary release version (defaults to latest)

​
Response

​
suggestions
array
Array of autocomplete suggestions with concept details
curl -X GET "https://api.omophub.com/v1/search/autocomplete?query=diab&page_size=5" \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "suggestions": [
    {
      "concept_id": 201826,
      "concept_name": "Type 2 diabetes mellitus",
      "concept_code": "44054006",
      "vocabulary_id": "SNOMED",
      "domain_id": "Condition",
      "concept_class_id": "Clinical Finding",
      "standard_concept": "S",
      "score": 0.95
    },
    {
      "concept_id": 201254,
      "concept_name": "Type 1 diabetes mellitus",
      "concept_code": "46635009",
      "vocabulary_id": "SNOMED",
      "domain_id": "Condition",
      "concept_class_id": "Clinical Finding",
      "standard_concept": "S",
      "score": 0.92
    },
    {
      "concept_id": 443238,
      "concept_name": "Diabetic retinopathy",
      "concept_code": "4855003",
      "vocabulary_id": "SNOMED",
      "domain_id": "Condition",
      "concept_class_id": "Clinical Finding",
      "standard_concept": "S",
      "score": 0.88
    }
  ],
  "meta": {
    "query": "diab",
    "algorithm": "default",
    "total_suggestions": 3,
    "vocab_release": "2025.2"
  }
}

​
Usage Examples

​
Basic Autocomplete

Get suggestions for a partial query: 
curl -X GET "https://api.omophub.com/v1/search/autocomplete?query=asth&page_size=10" \
  -H "Authorization: Bearer YOUR_API_KEY"

​
Vocabulary-Filtered Autocomplete

Focus suggestions on specific vocabularies: 
curl -X GET "https://api.omophub.com/v1/search/autocomplete?query=hyper&vocabulary_ids=SNOMED,ICD10CM&page_size=10" \
  -H "Authorization: Bearer YOUR_API_KEY"

​
Domain-Filtered Autocomplete

Get suggestions only for specific domains: 
curl -X GET "https://api.omophub.com/v1/search/autocomplete?query=aspir&domain_ids=Drug&page_size=10" \
  -H "Authorization: Bearer YOUR_API_KEY"

​
Phonetic Matching (Soundex)

Use phonetic matching to handle misspellings: 
curl -X GET "https://api.omophub.com/v1/search/autocomplete?query=diabetis&algorithm=soundex&page_size=10" \
  -H "Authorization: Bearer YOUR_API_KEY"
This will find “diabetes” even when spelled incorrectly as “diabetis”.

​
Algorithms

​
Default Algorithm

  • Standard prefix matching
  • Fast and accurate for correctly spelled queries
  • Best for real-time autocomplete UX

​
Soundex Algorithm

  • Phonetic matching based on pronunciation
  • Handles common misspellings and typos
  • Useful for voice-to-text input or uncertain spellings
  • Example: “noomonia” matches “pneumonia”

​
Performance Notes

  • Minimum query length: 2 characters required
  • Response time: Optimized for real-time use (<100ms typical)
  • Caching: Results are cached for 24 hours per vocabulary release
  • Rate limiting: Standard rate limits apply