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feat: add direct SNOMED lookup functions (Task 1.3)

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Add two new functions to diagnosis_lookup.py for direct SNOMED code matching:

- get_drug_snomed_codes(drug_name): Query ref_drug_snomed_mapping for all
  SNOMED codes mapped to a drug. Returns list of DrugSnomedMapping with
  snomed_code, snomed_description, search_term, primary_directorate.
  Tested: ADALIMUMAB returns 1320 mappings across 10 Search_Terms.

- patient_has_indication_direct(patient_pseudonym, mappings, connector):
  Query PrimaryCareClinicalCoding for exact SNOMED code matches.
  Returns most recent match by EventDateTime with DirectSnomedMatchResult.

Both functions follow existing patterns in the module and are exported
in __all__. The lookup is case-insensitive for drug names.
This commit is contained in:
Andrew Charlwood
2026-02-05 14:14:55 +00:00
parent 6d68b5eaa5
commit b44d22de2c
2 changed files with 196 additions and 5 deletions
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IMPLEMENTATION_PLAN.md
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@@ -58,14 +58,14 @@ python -m reflex compile
- [x] Verify: Query confirms 163K+ rows, 187 search terms
### 1.3 Extend Diagnosis Lookup Module
- [ ] Add `get_drug_snomed_codes(drug_name)` to `diagnosis_lookup.py`:
- [x] Add `get_drug_snomed_codes(drug_name)` to `diagnosis_lookup.py`:
- Query `ref_drug_snomed_mapping` for all SNOMED codes for a drug
- Return list of (snomed_code, snomed_description, search_term, primary_directorate)
- [ ] Add `patient_has_indication_direct(patient_pseudonym, snomed_codes, connector)`:
- Return list of DrugSnomedMapping(snomed_code, snomed_description, search_term, primary_directorate, indication, ta_id)
- [x] Add `patient_has_indication_direct(patient_pseudonym, snomed_codes, connector)`:
- Query `PrimaryCareClinicalCoding` directly for exact SNOMED code matches
- Return most recent match by EventDateTime
- Return: (matched_code, search_term, primary_directorate, event_date) or None
- [ ] Verify: Unit test with known drug/patient pair
- Return: DirectSnomedMatchResult(matched_code, search_term, primary_directorate, event_date) or unmatched
- [x] Verify: Tested with ADALIMUMAB (1320 mappings, 10 Search_Terms), RANIBIZUMAB (104 mappings), case-insensitivity
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