diff --git a/data/specifiers-content.json b/data/specifiers-content.json
index a75df6706..542d6426f 100644
--- a/data/specifiers-content.json
+++ b/data/specifiers-content.json
@@ -5568,15 +5568,15 @@
         },
         {
           "name": "Trance Disorder (ICD-11)",
-          "icd11Context": "ICD-11: Altered state of consciousness with/without possession.",
+          "icd11Context": "ICD-11: 6B62 Trance disorder is a dissociative state without a replacing external identity; the possession form is the separate diagnosis 6B63 Possession trance disorder, not a with/without specifier.",
           "groups": [
             {
               "label": "Features",
               "items": [
                 {
-                  "label": "With/without possession",
+                  "label": "Possession trance is a separate ICD-11 diagnosis (6B63)",
                   "definition": {
-                    "meaning": "The dissociative presentation may occur with or without experiences of being taken over by an external identity, spirit, or power (the possession vs non-possession form).",
+                    "meaning": "In ICD-11, trance disorder (6B62) and possession trance disorder (6B63) are two distinct diagnoses — not a with/without specifier: 6B62 is a dissociative trance without a replacing identity, and 6B63 is a trance in which identity is replaced by an external identity, spirit, or power. Record the appropriate diagnosis rather than a possession qualifier.",
                     "clinicalNote": null,
                     "sourceFamily": "WHO ICD-11 CDDR/MMS",
                     "status": "defined"
@@ -11971,15 +11971,15 @@
         },
         {
           "name": "Trance Disorder",
-          "icd11Context": "ICD-11: Altered state of consciousness with/without possession.",
+          "icd11Context": "ICD-11: 6B62 Trance disorder is a dissociative state without a replacing external identity; the possession form is the separate diagnosis 6B63 Possession trance disorder, not a with/without specifier.",
           "groups": [
             {
               "label": "Features",
               "items": [
                 {
-                  "label": "With/without possession",
+                  "label": "Possession trance is a separate ICD-11 diagnosis (6B63)",
                   "definition": {
-                    "meaning": "The dissociative presentation may occur with or without experiences of being taken over by an external identity, spirit, or power (the possession vs non-possession form).",
+                    "meaning": "In ICD-11, trance disorder (6B62) and possession trance disorder (6B63) are two distinct diagnoses — not a with/without specifier: 6B62 is a dissociative trance without a replacing identity, and 6B63 is a trance in which identity is replaced by an external identity, spirit, or power. Record the appropriate diagnosis rather than a possession qualifier.",
                     "clinicalNote": null,
                     "sourceFamily": "WHO ICD-11 CDDR/MMS",
                     "status": "defined"
diff --git a/data/specifiers-search-index.json b/data/specifiers-search-index.json
index 743ad17dd..afadf3a96 100644
--- a/data/specifiers-search-index.json
+++ b/data/specifiers-search-index.json
@@ -2871,7 +2871,7 @@
     },
     {
       "slug": "specifier-dis-trance-disorder-icd-11-features-with-without-possession",
-      "label": "With/without possession",
+      "label": "Possession trance is a separate ICD-11 diagnosis (6B63)",
       "disorder": "Trance Disorder (ICD-11)",
       "categoryId": "dis",
       "category": "8. Dissociative Disorders",
@@ -6402,7 +6402,7 @@
     },
     {
       "slug": "specifier-icd-trance-disorder-features-with-without-possession",
-      "label": "With/without possession",
+      "label": "Possession trance is a separate ICD-11 diagnosis (6B63)",
       "disorder": "Trance Disorder",
       "categoryId": "icd",
       "category": "20. ICD-11 Specifics",
diff --git a/tests/specifiers-content.test.ts b/tests/specifiers-content.test.ts
index 29e9f7226..fdfe8cc82 100644
--- a/tests/specifiers-content.test.ts
+++ b/tests/specifiers-content.test.ts
@@ -131,12 +131,23 @@ describe("specifiers content catalog", () => {
     }
   });
 
-  it("describes with/without possession rows for both states", () => {
-    const rows = specifierCatalogItems().filter((item) => /possession/i.test(item.label));
-    expect(rows.length).toBeGreaterThan(0);
-    for (const item of rows) {
-      // Must not assert possession is present; must acknowledge both states.
-      expect(item.definition?.meaning ?? "").toMatch(/with or without|may occur|present or absent/i);
+  it("frames possession per ICD-11: DID covers both forms; Trance splits into 6B63", () => {
+    const items = specifierCatalogItems();
+    // DID (ICD-11 6B64) genuinely encompasses both possession and non-possession forms
+    // within one diagnosis, so its meaning must acknowledge both states.
+    const did = items.find(
+      (item) => /dissociative identity/i.test(item.disorderName) && /possession/i.test(item.label),
+    );
+    expect(did?.definition?.meaning ?? "").toMatch(/with or without|both|may occur/i);
+    // Trance Disorder must NOT frame possession as a with/without specifier — ICD-11
+    // codes possession trance as the separate diagnosis 6B63.
+    const trance = items.filter(
+      (item) => /^trance disorder/i.test(item.disorderName) && /possession/i.test(item.label),
+    );
+    expect(trance.length).toBeGreaterThanOrEqual(1);
+    for (const item of trance) {
+      expect(item.label).toMatch(/6B63|separate/i);
+      expect(item.definition?.meaning ?? "").toMatch(/6B62|6B63|separate diagnosis/i);
     }
   });