The file C:\Users\charlwoodand\Ralph local\Tasks\UI Redesign\progress.txt has been updated successfully.

### Blocked items:
- None

## Iteration 2 ÔÇö 2026-02-05
### Task: 1.2 ÔÇö Merge related asthma Search_Terms in CLUSTER_MAPPING_SQL
### Why this task:
- Previous iteration recommended this as the next task (self-contained, testable locally)
- Both CLUSTER_MAPPING_SQL and load_drug_indication_mapping() need consistent Search_Term names
- Must be done before Task 1.1 (Snowflake query) to ensure GP lookups return "asthma" not "allergic asthma"
### Status: COMPLETE
### What was done:
- Updated CLUSTER_MAPPING_SQL: changed 'allergic asthma' ÔåÆ 'asthma' (AST_COD) and 'severe persistent allergic asthma' ÔåÆ 'asthma' (SEVAST_COD)
  - Now 3 rows for 'asthma': AST_COD, eFI2_Asthma, SEVAST_COD
  - urticaria (XSAL_COD) stays separate
- Added SEARCH_TERM_MERGE_MAP constant: {"allergic asthma": "asthma", "severe persistent allergic asthma": "asthma"}
- Updated load_drug_indication_mapping() to apply SEARCH_TERM_MERGE_MAP when loading CSV
  - Normalizes Search_Term before accumulating fragments
  - Drug fragments from all 3 original rows combined under "asthma" key
- Exported SEARCH_TERM_MERGE_MAP in __all__
### Validation results:
- Tier 1 (Code): py_compile passed, import check passed
- Tier 2 (Data):
  - "asthma" fragments: OMALIZUMAB, BENRALIZUMAB, DUPILUMAB, INHALED, MEPOLIZUMAB, RESLIZUMAB (complete combined list)
  - "allergic asthma" no longer exists as separate key
  - "severe persistent allergic asthma" no longer exists as separate key
  - "urticaria" ÔåÆ ['OMALIZUMAB'] ÔÇö correctly separate
  - OMALIZUMAB maps to: ['asthma', 'urticaria'] ÔÇö correct
  - Total Search_Terms: 162 (was 164, 3 asthma entries ÔåÆ 1)
  - Total fragments: 346 (unchanged)
- Tier 3 (Functional): N/A (no UI changes)
### Files changed:
- data_processing/diagnosis_lookup.py (CLUSTER_MAPPING_SQL, SEARCH_TERM_MERGE_MAP, load_drug_indication_mapping)
- IMPLEMENTATION_PLAN.md (marked 1.2 subtasks [x])
### Committed: [pending]
### Patterns discovered:
- SEARCH_TERM_MERGE_MAP is reusable: any future module that receives Search_Terms from Snowflake can apply the same normalization
- The merge approach (normalize at load time) is cleaner than post-hoc deduplication
### Next iteration should:
- Work on Task 1.1: Update `get_patient_indication_groups()` to return ALL matches with code_frequency
  - The current query at ~line 1467 uses `QUALIFY ROW_NUMBER() OVER (PARTITION BY pc."PatientPseudonym" ORDER BY pc."EventDateTime" DESC) = 1`
  - Replace with GROUP BY + COUNT(*) for code_frequency
  - Add `earliest_hcd_date` parameter to restrict GP codes to HCD data window
  - Return columns: PatientPseudonym, Search_Term, code_frequency
  - Empty DataFrame columns should match new return type
  - This requires Snowflake connectivity to fully test, but code changes can be verified with py_compile and import checks
- OR work on Task 2.1: Create assign_drug_indications() ÔÇö can be built and tested with mock data
  - This is independent of Task 1.1 if you mock the gp_matches_df input
### Blocked items:
- None

# Progress Log - Drug-Aware Indication Matching

## Project Context

This project extends the indication-based pathway charts (Phase 1-5 complete) with drug-aware matching.

**Previous state**: Patients get ONE indication based on their most recent GP diagnosis match (SNOMED cluster codes). This ignores which drugs the patient is taking.

**New goal**: Match each drug to an indication by cross-referencing the patient's GP diagnoses AND the drug's Search_Term mapping from DimSearchTerm.csv.

## Key Data/Patterns

### DimSearchTerm.csv
- Located at `data/DimSearchTerm.csv`
- Columns: Search_Term, CleanedDrugName (pipe-separated), PrimaryDirectorate
- ~165 rows mapping clinical conditions to drug name fragments
- Drug fragments are substrings that match standardized drug names from HCD data
- Some entries have generic fragments: INHALED, CONTINUOUS, STANDARD-DOSE, PEGYLATED

### Current get_patient_indication_groups() in diagnosis_lookup.py
- Uses CLUSTER_MAPPING_SQL as CTE in Snowflake query
- Returns ONLY the most recent match per patient (QUALIFY ROW_NUMBER() = 1)
- Needs to return ALL matching Search_Terms per patient (remove QUALIFY)
- Batches 500 patients per query

### Modified UPID approach
- Current: UPID = Provider Code[:3] + PersonKey (e.g., "RMV12345")
- New: UPID = original + "|" + search_term (e.g., "RMV12345|rheumatoid arthritis")
- The pipe delimiter "|" is safe because existing UPIDs are alphanumeric
- generate_icicle_chart_indication() treats UPID as an opaque identifier ÔÇö modified UPIDs work transparently
- The " - " delimiter in pathway ids is used for hierarchy levels, not within UPIDs

### PseudoNHSNoLinked mapping
- HCD data has PseudoNHSNoLinked column that matches PatientPseudonym in GP records
- PersonKey is provider-specific local ID ÔÇö do NOT use for GP matching
- One PseudoNHSNoLinked can map to multiple UPIDs (multi-provider patients)
- GP match lookup: PseudoNHSNoLinked ÔåÆ list of matched Search_Terms

### Drug matching logic
- For each HCD row (UPID + Drug Name):
  1. Get patient's GP-matched Search_Terms with code_frequency (via PseudoNHSNoLinked)
  2. Get which Search_Terms list this drug (from DimSearchTerm.csv)
  3. Intersection = valid indications
  4. If 1: use it. If multiple: pick highest code_frequency (most GP coding = most likely indication). If 0: fallback to directory.
- Modified UPID groups drugs under same indication together naturally
- code_frequency = COUNT(*) of matching SNOMED codes per Search_Term per patient in GP records
- GP code time range: only count codes from MIN(Intervention Date) onwards (the HCD data window)
  - Reduces noise from old/irrelevant diagnoses, makes frequency more meaningful
  - Pass earliest_hcd_date as parameter to get_patient_indication_groups()
- Tiebreaker rationale: 47 RA codes vs 2 crohn's codes ÔåÆ RA is clearly the active condition

### Known edge cases
- Some DimSearchTerm drug fragments are generic (INHALED, ORAL, CONTINUOUS)
  - These could match broadly but are constrained by GP diagnosis requirement
- A patient visiting multiple providers has multiple UPIDs
  - Each UPID gets its own drug-indication matching independently
- Same Search_Term appears twice in DimSearchTerm.csv with different directorates
  - e.g., "diabetes" ÔåÆ DIABETIC MEDICINE and OPHTHALMOLOGY
  - For indication charts, we use Search_Term not directorate, so this is fine

## Iteration Log

## Iteration 1 ÔÇö 2026-02-05
### Task: 1.3 ÔÇö Build drug-to-Search_Term lookup from DimSearchTerm.csv
### Why this task:
- First iteration, chose Phase 1 foundations. Task 1.2 (CSV loading) is self-contained and testable locally without Snowflake.
- Task 1.1 (Snowflake query update) can't be verified without a live connection ÔÇö better to do 1.2 first.
- Both 1.1 and 1.2 are independent, so order doesn't matter for dependencies.
### Status: COMPLETE
### What was done:
- Added `load_drug_indication_mapping()` to `diagnosis_lookup.py`:
  - Loads `data/DimSearchTerm.csv`, builds two dicts:
    - `fragment_to_search_terms`: drug fragment (UPPER) ÔåÆ list of Search_Terms
    - `search_term_to_fragments`: search_term ÔåÆ list of drug fragments (UPPER)
  - Handles duplicate Search_Terms (e.g., "diabetes" rows combined)
  - Result: 164 Search_Terms, 346 drug fragments
- Added `get_search_terms_for_drug()` to `diagnosis_lookup.py`:
  - Returns all Search_Terms whose drug fragments are substrings of the drug name (case-insensitive)
  - Named differently from plan's `drug_matches_search_term()` ÔÇö returns all matches at once rather than single boolean, more practical for Phase 2
- Updated `__all__` exports
### Validation results:
- Tier 1 (Code): py_compile passed, import check passed
- Tier 2 (Data): ADALIMUMAB ÔåÆ 7 indications (including axial spondyloarthritis, rheumatoid arthritis), OMALIZUMAB ÔåÆ 4 indications (asthma, allergic asthma, etc.), PEGYLATED LIPOSOMAL DOXORUBICIN ÔåÆ 4 matches via substring, "ADALIMUMAB 40MG" matches correctly with dosage info, diabetes fragments combined from 2 CSV rows
- Tier 3 (Functional): N/A (no UI changes)
### Files changed:
- data_processing/diagnosis_lookup.py (added load_drug_indication_mapping, get_search_terms_for_drug)
- IMPLEMENTATION_PLAN.md (marked 1.2 subtasks [x])
### Committed: 0779df7 "feat: add drug-to-indication mapping from DimSearchTerm.csv (Task 1.3)"
### Patterns discovered:
- DimSearchTerm.csv has 164 unique Search_Terms (not 165 as noted) because diabetes appears twice with different directorates but same Search_Term
- Some drug fragments are very generic: INHALED, CONTINUOUS, ORAL, STANDARD-DOSE, INTRAVENOUS, PEGYLATED, ROUTINE, INDUCTION ÔÇö these will match broadly but are constrained by the GP diagnosis requirement in Phase 2
- Function signatures for Phase 2: `get_search_terms_for_drug(drug_name, search_term_to_fragments)` returns list[str] ÔÇö use this to get candidate indications per drug
### Next iteration should:
- Work on Task 1.2: Merge asthma Search_Terms in CLUSTER_MAPPING_SQL and load_drug_indication_mapping()
  - Merge "allergic asthma", "asthma", "severe persistent allergic asthma" ÔåÆ "asthma"
  - Keep "urticaria" separate
  - This is self-contained and testable locally
- OR work on Task 1.1: Update `get_patient_indication_groups()` to return ALL matches with code_frequency
  - The current query at line ~1352 of diagnosis_lookup.py uses `QUALIFY ROW_NUMBER() OVER (PARTITION BY pc."PatientPseudonym" ORDER BY pc."EventDateTime" DESC) = 1` ÔÇö this must be replaced with GROUP BY + COUNT(*)
  - Add `earliest_hcd_date` parameter to restrict GP codes to HCD data window
  - Return columns: PatientPseudonym, Search_Term, code_frequency (not EventDateTime)
- OR if Snowflake isn't available to test 1.1, skip to Task 2.1 (assign_drug_indications function) which can be built and tested with mock data
### Blocked items:
- None

+### Task: 1.2 ÔÇö Merge related asthma Search_Terms in CLUSTER_MAPPING_SQL

+- Previous iteration recommended this as the next task (self-contained, testable locally)

+- Both CLUSTER_MAPPING_SQL and load_drug_indication_mapping() need consistent Search_Term names

+- Must be done before Task 1.1 (Snowflake query) to ensure GP lookups return "asthma" not "allergic asthma"

+- Updated CLUSTER_MAPPING_SQL: changed 'allergic asthma' ÔåÆ 'asthma' (AST_COD) and 'severe persistent allergic asthma' ÔåÆ 'asthma' (SEVAST_COD)

+  - Now 3 rows for 'asthma': AST_COD, eFI2_Asthma, SEVAST_COD

+  - urticaria (XSAL_COD) stays separate

+- Added SEARCH_TERM_MERGE_MAP constant: {"allergic asthma": "asthma", "severe persistent allergic asthma": "asthma"}

+- Updated load_drug_indication_mapping() to apply SEARCH_TERM_MERGE_MAP when loading CSV

+  - Normalizes Search_Term before accumulating fragments

+  - Drug fragments from all 3 original rows combined under "asthma" key

+- Exported SEARCH_TERM_MERGE_MAP in __all__

+- Tier 1 (Code): py_compile passed, import check passed

+  - "asthma" fragments: OMALIZUMAB, BENRALIZUMAB, DUPILUMAB, INHALED, MEPOLIZUMAB, RESLIZUMAB (complete combined list)

+  - "allergic asthma" no longer exists as separate key

+  - "severe persistent allergic asthma" no longer exists as separate key

+  - "urticaria" ÔåÆ ['OMALIZUMAB'] ÔÇö correctly separate

+  - OMALIZUMAB maps to: ['asthma', 'urticaria'] ÔÇö correct

+  - Total Search_Terms: 162 (was 164, 3 asthma entries ÔåÆ 1)

+- Tier 3 (Functional): N/A (no UI changes)

+- data_processing/diagnosis_lookup.py (CLUSTER_MAPPING_SQL, SEARCH_TERM_MERGE_MAP, load_drug_indication_mapping)

+- IMPLEMENTATION_PLAN.md (marked 1.2 subtasks [x])

+- SEARCH_TERM_MERGE_MAP is reusable: any future module that receives Search_Terms from Snowflake can apply the same normalization

+- The merge approach (normalize at load time) is cleaner than post-hoc deduplication

+- Work on Task 1.1: Update `get_patient_indication_groups()` to return ALL matches with code_frequency

+  - The current query at ~line 1467 uses `QUALIFY ROW_NUMBER() OVER (PARTITION BY pc."PatientPseudonym" ORDER BY pc."EventDateTime" DESC) = 1`

+  - Replace with GROUP BY + COUNT(*) for code_frequency

+  - Add `earliest_hcd_date` parameter to restrict GP codes to HCD data window

+  - Return columns: PatientPseudonym, Search_Term, code_frequency

+  - Empty DataFrame columns should match new return type

+  - This requires Snowflake connectivity to fully test, but code changes can be verified with py_compile and import checks

+- OR work on Task 2.1: Create assign_drug_indications() ÔÇö can be built and tested with mock data

+  - This is independent of Task 1.1 if you mock the gp_matches_df input


Now let me commit the changes.


Bash

cd "C:\Users\charlwoodand\Ralph local\Tasks\UI Redesign" && git add data_processing/diagnosis_lookup.py IMPLEMENTATION_PLAN.md progress.txt

Stage changed files for commit


cd "C:\Users\charlwoodand\Ralph local\Tasks\UI Redesign" && git commit -m "$(cat <<'EOF'
feat: merge asthma Search_Term variants in CLUSTER_MAPPING_SQL and drug mapping (Task 1.2)

Merge 'allergic asthma' and 'severe persistent allergic asthma' into
canonical 'asthma' in both CLUSTER_MAPPING_SQL (Snowflake CTE) and
load_drug_indication_mapping() (DimSearchTerm.csv loader).

- CLUSTER_MAPPING_SQL: 3 Cluster_IDs (AST_COD, eFI2_Asthma, SEVAST_COD) now
  all map to Search_Term = 'asthma'
- Added SEARCH_TERM_MERGE_MAP constant for reusable normalization
- load_drug_indication_mapping() applies merge at CSV load time
- urticaria (XSAL_COD) stays separate ÔÇö not merged with asthma
- Combined asthma drug list: BENRALIZUMAB, DUPILUMAB, INHALED, MEPOLIZUMAB,
  OMALIZUMAB, RESLIZUMAB
EOF
)"

Commit asthma merge changes


[feature/snomed-indication-mapping b0a8a9d] feat: merge asthma Search_Term variants in CLUSTER_MAPPING_SQL and drug mapping (Task 1.2)
 3 files changed, 88 insertions(+), 7 deletions(-)


Now let me update the commit hash in progress.txt.


Edit

### Committed: b0a8a9d "feat: merge asthma Search_Term variants in CLUSTER_MAPPING_SQL and drug mapping (Task 1.2)"


# Progress Log - Drug-Aware Indication Matching

## Project Context

This project extends the indication-based pathway charts (Phase 1-5 complete) with drug-aware matching.

**Previous state**: Patients get ONE indication based on their most recent GP diagnosis match (SNOMED cluster codes). This ignores which drugs the patient is taking.

**New goal**: Match each drug to an indication by cross-referencing the patient's GP diagnoses AND the drug's Search_Term mapping from DimSearchTerm.csv.

## Key Data/Patterns

### DimSearchTerm.csv
- Located at `data/DimSearchTerm.csv`
- Columns: Search_Term, CleanedDrugName (pipe-separated), PrimaryDirectorate
- ~165 rows mapping clinical conditions to drug name fragments
- Drug fragments are substrings that match standardized drug names from HCD data
- Some entries have generic fragments: INHALED, CONTINUOUS, STANDARD-DOSE, PEGYLATED

### Current get_patient_indication_groups() in diagnosis_lookup.py
- Uses CLUSTER_MAPPING_SQL as CTE in Snowflake query
- Returns ONLY the most recent match per patient (QUALIFY ROW_NUMBER() = 1)
- Needs to return ALL matching Search_Terms per patient (remove QUALIFY)
- Batches 500 patients per query

### Modified UPID approach
- Current: UPID = Provider Code[:3] + PersonKey (e.g., "RMV12345")
- New: UPID = original + "|" + search_term (e.g., "RMV12345|rheumatoid arthritis")
- The pipe delimiter "|" is safe because existing UPIDs are alphanumeric
- generate_icicle_chart_indication() treats UPID as an opaque identifier ÔÇö modified UPIDs work transparently
- The " - " delimiter in pathway ids is used for hierarchy levels, not within UPIDs

### PseudoNHSNoLinked mapping
- HCD data has PseudoNHSNoLinked column that matches PatientPseudonym in GP records
- PersonKey is provider-specific local ID ÔÇö do NOT use for GP matching
- One PseudoNHSNoLinked can map to multiple UPIDs (multi-provider patients)
- GP match lookup: PseudoNHSNoLinked ÔåÆ list of matched Search_Terms

### Drug matching logic
- For each HCD row (UPID + Drug Name):
  1. Get patient's GP-matched Search_Terms with code_frequency (via PseudoNHSNoLinked)
  2. Get which Search_Terms list this drug (from DimSearchTerm.csv)
  3. Intersection = valid indications
  4. If 1: use it. If multiple: pick highest code_frequency (most GP coding = most likely indication). If 0: fallback to directory.
- Modified UPID groups drugs under same indication together naturally
- code_frequency = COUNT(*) of matching SNOMED codes per Search_Term per patient in GP records
- GP code time range: only count codes from MIN(Intervention Date) onwards (the HCD data window)
  - Reduces noise from old/irrelevant diagnoses, makes frequency more meaningful
  - Pass earliest_hcd_date as parameter to get_patient_indication_groups()
- Tiebreaker rationale: 47 RA codes vs 2 crohn's codes ÔåÆ RA is clearly the active condition

### Known edge cases
- Some DimSearchTerm drug fragments are generic (INHALED, ORAL, CONTINUOUS)
  - These could match broadly but are constrained by GP diagnosis requirement
- A patient visiting multiple providers has multiple UPIDs
  - Each UPID gets its own drug-indication matching independently
- Same Search_Term appears twice in DimSearchTerm.csv with different directorates
  - e.g., "diabetes" ÔåÆ DIABETIC MEDICINE and OPHTHALMOLOGY
  - For indication charts, we use Search_Term not directorate, so this is fine

## Iteration Log

## Iteration 1 ÔÇö 2026-02-05
### Task: 1.3 ÔÇö Build drug-to-Search_Term lookup from DimSearchTerm.csv
### Why this task:
- First iteration, chose Phase 1 foundations. Task 1.2 (CSV loading) is self-contained and testable locally without Snowflake.
- Task 1.1 (Snowflake query update) can't be verified without a live connection ÔÇö better to do 1.2 first.
- Both 1.1 and 1.2 are independent, so order doesn't matter for dependencies.
### Status: COMPLETE
### What was done:
- Added `load_drug_indication_mapping()` to `diagnosis_lookup.py`:
  - Loads `data/DimSearchTerm.csv`, builds two dicts:
    - `fragment_to_search_terms`: drug fragment (UPPER) ÔåÆ list of Search_Terms
    - `search_term_to_fragments`: search_term ÔåÆ list of drug fragments (UPPER)
  - Handles duplicate Search_Terms (e.g., "diabetes" rows combined)
  - Result: 164 Search_Terms, 346 drug fragments
- Added `get_search_terms_for_drug()` to `diagnosis_lookup.py`:
  - Returns all Search_Terms whose drug fragments are substrings of the drug name (case-insensitive)
  - Named differently from plan's `drug_matches_search_term()` ÔÇö returns all matches at once rather than single boolean, more practical for Phase 2
- Updated `__all__` exports
### Validation results:
- Tier 1 (Code): py_compile passed, import check passed
- Tier 2 (Data): ADALIMUMAB ÔåÆ 7 indications (including axial spondyloarthritis, rheumatoid arthritis), OMALIZUMAB ÔåÆ 4 indications (asthma, allergic asthma, etc.), PEGYLATED LIPOSOMAL DOXORUBICIN ÔåÆ 4 matches via substring, "ADALIMUMAB 40MG" matches correctly with dosage info, diabetes fragments combined from 2 CSV rows
- Tier 3 (Functional): N/A (no UI changes)
### Files changed:
- data_processing/diagnosis_lookup.py (added load_drug_indication_mapping, get_search_terms_for_drug)
- IMPLEMENTATION_PLAN.md (marked 1.2 subtasks [x])
### Committed: 0779df7 "feat: add drug-to-indication mapping from DimSearchTerm.csv (Task 1.3)"
### Patterns discovered:
- DimSearchTerm.csv has 164 unique Search_Terms (not 165 as noted) because diabetes appears twice with different directorates but same Search_Term
- Some drug fragments are very generic: INHALED, CONTINUOUS, ORAL, STANDARD-DOSE, INTRAVENOUS, PEGYLATED, ROUTINE, INDUCTION ÔÇö these will match broadly but are constrained by the GP diagnosis requirement in Phase 2
- Function signatures for Phase 2: `get_search_terms_for_drug(drug_name, search_term_to_fragments)` returns list[str] ÔÇö use this to get candidate indications per drug
### Next iteration should:
- Work on Task 1.2: Merge asthma Search_Terms in CLUSTER_MAPPING_SQL and load_drug_indication_mapping()
  - Merge "allergic asthma", "asthma", "severe persistent allergic asthma" ÔåÆ "asthma"
  - Keep "urticaria" separate
  - This is self-contained and testable locally
- OR work on Task 1.1: Update `get_patient_indication_groups()` to return ALL matches with code_frequency
  - The current query at line ~1352 of diagnosis_lookup.py uses `QUALIFY ROW_NUMBER() OVER (PARTITION BY pc."PatientPseudonym" ORDER BY pc."EventDateTime" DESC) = 1` ÔÇö this must be replaced with GROUP BY + COUNT(*)
  - Add `earliest_hcd_date` parameter to restrict GP codes to HCD data window
  - Return columns: PatientPseudonym, Search_Term, code_frequency (not EventDateTime)
- OR if Snowflake isn't available to test 1.1, skip to Task 2.1 (assign_drug_indications function) which can be built and tested with mock data
### Blocked items:
- None

## Iteration 2 ÔÇö 2026-02-05
### Task: 1.2 ÔÇö Merge related asthma Search_Terms in CLUSTER_MAPPING_SQL
### Why this task:
- Previous iteration recommended this as the next task (self-contained, testable locally)
- Both CLUSTER_MAPPING_SQL and load_drug_indication_mapping() need consistent Search_Term names
- Must be done before Task 1.1 (Snowflake query) to ensure GP lookups return "asthma" not "allergic asthma"
### Status: COMPLETE
### What was done:
- Updated CLUSTER_MAPPING_SQL: changed 'allergic asthma' ÔåÆ 'asthma' (AST_COD) and 'severe persistent allergic asthma' ÔåÆ 'asthma' (SEVAST_COD)
  - Now 3 rows for 'asthma': AST_COD, eFI2_Asthma, SEVAST_COD
  - urticaria (XSAL_COD) stays separate
- Added SEARCH_TERM_MERGE_MAP constant: {"allergic asthma": "asthma", "severe persistent allergic asthma": "asthma"}
- Updated load_drug_indication_mapping() to apply SEARCH_TERM_MERGE_MAP when loading CSV
  - Normalizes Search_Term before accumulating fragments
  - Drug fragments from all 3 original rows combined under "asthma" key
- Exported SEARCH_TERM_MERGE_MAP in __all__
### Validation results:
- Tier 1 (Code): py_compile passed, import check passed
- Tier 2 (Data):
  - "asthma" fragments: OMALIZUMAB, BENRALIZUMAB, DUPILUMAB, INHALED, MEPOLIZUMAB, RESLIZUMAB (complete combined list)
  - "allergic asthma" no longer exists as separate key
  - "severe persistent allergic asthma" no longer exists as separate key
  - "urticaria" ÔåÆ ['OMALIZUMAB'] ÔÇö correctly separate
  - OMALIZUMAB maps to: ['asthma', 'urticaria'] ÔÇö correct
  - Total Search_Terms: 162 (was 164, 3 asthma entries ÔåÆ 1)
  - Total fragments: 346 (unchanged)
- Tier 3 (Functional): N/A (no UI changes)
### Files changed:
- data_processing/diagnosis_lookup.py (CLUSTER_MAPPING_SQL, SEARCH_TERM_MERGE_MAP, load_drug_indication_mapping)
- IMPLEMENTATION_PLAN.md (marked 1.2 subtasks [x])
### Committed: [pending]
### Patterns discovered:
- SEARCH_TERM_MERGE_MAP is reusable: any future module that receives Search_Terms from Snowflake can apply the same normalization
- The merge approach (normalize at load time) is cleaner than post-hoc deduplication
### Next iteration should:
- Work on Task 1.1: Update `get_patient_indication_groups()` to return ALL matches with code_frequency
  - The current query at ~line 1467 uses `QUALIFY ROW_NUMBER() OVER (PARTITION BY pc."PatientPseudonym" ORDER BY pc."EventDateTime" DESC) = 1`
  - Replace with GROUP BY + COUNT(*) for code_frequency
  - Add `earliest_hcd_date` parameter to restrict GP codes to HCD data window
  - Return columns: PatientPseudonym, Search_Term, code_frequency
  - Empty DataFrame columns should match new return type
  - This requires Snowflake connectivity to fully test, but code changes can be verified with py_compile and import checks
- OR work on Task 2.1: Create assign_drug_indications() ÔÇö can be built and tested with mock data
  - This is independent of Task 1.1 if you mock the gp_matches_df input
### Blocked items:
- None

+### Committed: b0a8a9d "feat: merge asthma Search_Term variants in CLUSTER_MAPPING_SQL and drug mapping (Task 1.2)"


Bash

cd "C:\Users\charlwoodand\Ralph local\Tasks\UI Redesign" && git add progress.txt && git commit -m "$(cat <<'EOF'
docs: update progress.txt with Iteration 2 results (Task 1.2)
EOF
)"

Commit progress.txt update


[feature/snomed-indication-mapping 4fed0e5] docs: update progress.txt with Iteration 2 results (Task 1.2)
 1 file changed, 1 insertion(+), 1 deletion(-)


TodoWrite

Read DimSearchTerm.csv for asthma rows and understand current CLUSTER_MAPPING_SQL asthma entries

Analyzing asthma-related entries in data sources

Update CLUSTER_MAPPING_SQL to map all 3 asthma Cluster_IDs to 'asthma' Search_Term

Updating CLUSTER_MAPPING_SQL asthma entries

Update load_drug_indication_mapping() to merge asthma variants

Updating load_drug_indication_mapping() for asthma merge

Validate: py_compile, import check, asthma merge correctness

Commit changes and update progress.txt


Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Read DimSearchTerm.csv for asthma rows and understand current CLUSTER_MAPPING_SQL asthma entries

Analyzing asthma-related entries in data sources

Update CLUSTER_MAPPING_SQL to map all 3 asthma Cluster_IDs to 'asthma' Search_Term

Updating CLUSTER_MAPPING_SQL asthma entries

Update load_drug_indication_mapping() to merge asthma variants

Updating load_drug_indication_mapping() for asthma merge

Validate: py_compile, import check, asthma merge correctness

Commit changes and update progress.txt

Commit changes and update progress.txt


**Iteration 2 complete.** Here's the summary:

**Task 1.2: Merge related asthma Search_Terms** ÔÇö DONE

Changes made:
1. **CLUSTER_MAPPING_SQL**: `'allergic asthma'` ÔåÆ `'asthma'` (AST_COD) and `'severe persistent allergic asthma'` ÔåÆ `'asthma'` (SEVAST_COD). Now 3 Cluster_IDs all map to `'asthma'`.
2. **SEARCH_TERM_MERGE_MAP**: New constant mapping asthma variants ÔåÆ canonical `"asthma"`. Reusable by other modules.
3. **load_drug_indication_mapping()**: Applies merge map at CSV load time. Combined asthma drug list: BENRALIZUMAB, DUPILUMAB, INHALED, MEPOLIZUMAB, OMALIZUMAB, RESLIZUMAB.
4. **urticaria** stays separate (XSAL_COD, OMALIZUMAB only).

All validation passed. Commits: `b0a8a9d`, `4fed0e5`.

**Next iteration**: Task 1.1 (update Snowflake query to return ALL matches with code_frequency) or Task 2.1 (assign_drug_indications function).