Add documentation for Patients Visited by Physiotherapists query

Care/Clinical/patients_visited_by_physio_kc.md

@@ -0,0 +1,53 @@
+
+# Patients Visited by Physiotherapists
+
+> Count of unique living patients who received a physiotherapist visit
+
+## Purpose
+
+Returns the total count of patients who got a physiotherapist visit. Filterable by facility, date, and the staff member who recorded the response.
+
+## Parameters
+
+| Parameter | Type | Description | Example |
+|-----------|------|-------------|---------|
+| `facility_id` | TEXT | Filter by facility external ID (exact match on `facility_facility.external_id`) | `'facility-uuid-1234'` |
+| `date` | DATE / range | Metabase date filter (typically bound to `emr_questionnaireresponse.created_date`) | `'2026-07-01'` |
+| `staff_name` | TEXT | Filter by the full name of the staff who recorded the response (prefix + first + last) | `'Dr. Jane Smith'` |
+
+---
+
+## Query
+
+```sql
+WITH nurse_responses AS (
+    SELECT
+        emr_questionnaireresponse.patient_id
+    FROM emr_questionnaireresponse
+    JOIN emr_encounter
+        ON emr_encounter.id = emr_questionnaireresponse.encounter_id
+    JOIN facility_facility
+        ON facility_facility.id = emr_encounter.facility_id
+    JOIN emr_patient
+        ON emr_patient.id = emr_questionnaireresponse.patient_id
+    JOIN users_user
+        ON users_user.id = emr_questionnaireresponse.created_by_id
+    WHERE emr_questionnaireresponse.questionnaire_id = 265
+      AND emr_questionnaireresponse.status = 'completed'
+      AND emr_questionnaireresponse.encounter_id IS NOT NULL
+      AND emr_patient.deceased_datetime IS NULL
+      --[[AND facility_facility.external_id::text = {{facility_id}}]]
+      --[[AND {{date}}]]
+      --[[AND TRIM(COALESCE(users_user.prefix || ' ', '') || users_user.first_name || ' ' || users_user.last_name, '') = {{staff_name}}]]
+)
+SELECT
+    COUNT(patient_id) AS homecare_patient_count
+FROM nurse_responses;
+```
+
+## Notes
+
+- **Questionnaire filter:** `questionnaire_id = 265` is the physio home-care questionnaire. Update if the questionnaire id changes.
+- **Completed responses only:** `status = 'completed'` 
+
+*Last updated: 2026-07-15*