diff --git a/src/components/clinical-dashboard/global-search-shell.tsx b/src/components/clinical-dashboard/global-search-shell.tsx
index 186a0dac2c..285a8d7c77 100644
--- a/src/components/clinical-dashboard/global-search-shell.tsx
+++ b/src/components/clinical-dashboard/global-search-shell.tsx
@@ -260,30 +260,6 @@ function readInitialBrowserSubmittedSearchParamString(): string {
   return params.get("run") === "1" && query ? search : "";
 }
 
-export function infoPageBackHref(pathname: string): string | null {
-  if (pathname.startsWith("/services/")) return appModeHomeHref("services");
-  if (pathname.startsWith("/forms/")) return appModeHomeHref("forms");
-  if (pathname.startsWith("/medications/")) return appModeHomeHref("prescribing");
-  if (pathname.startsWith("/differentials/")) return appModeHomeHref("differentials");
-  if (pathname.startsWith("/dsm/")) return appModeHomeHref("dsm");
-  if (pathname.startsWith("/specifiers/")) return appModeHomeHref("specifiers");
-  if (pathname.startsWith("/formulation/")) return appModeHomeHref("formulation");
-  if (pathname.startsWith("/therapy-compass/")) return appModeHomeHref("therapy-compass");
-  if (pathname.startsWith("/factsheets/")) return appModeHomeHref("factsheets");
-  if (pathname.startsWith("/documents/")) return documentsSearchHref();
-  return null;
-}
-
-/** Stable in-app back target for non-info mobile back (e.g. submitted differential search). */
-export function mobileBackHref(pathname: string, searchMode: string, hasQuery: boolean): string | null {
-  const infoHref = infoPageBackHref(pathname);
-  if (infoHref) return infoHref;
-  if (pathname === "/differentials" && searchMode === "differentials" && hasQuery) {
-    return appModeHomeHref("differentials", { focus: true });
-  }
-  return null;
-}
-
 function isToolDetailWithFooterSearch(pathname: string): boolean {
   return (
     (pathname.startsWith("/services/") && pathname !== "/services") ||
@@ -864,27 +840,6 @@ function GlobalStandaloneSearchShellBody({
             onNewChat={startNewAnswerChat}
             showDesktopNewChat={!shouldShowDesktopSidebar}
             onOpenMobileSidebar={() => setMobileMenuOpen(true)}
-            mobileLeadingAction={
-              isInfoPage
-                ? "back"
-                : pathname === "/differentials" && searchMode === "differentials" && requestedQuery
-                  ? "back"
-                  : "menu"
-            }
-            onMobileBack={() => {
-              const fallbackHref = mobileBackHref(pathname, searchMode, Boolean(requestedQuery));
-              if (fallbackHref) {
-                if (!isInfoPage) setQuery("");
-                router.push(fallbackHref);
-                return;
-              }
-              if (!isInfoPage) {
-                setQuery("");
-                navigateToMode(searchMode, { focus: true });
-                return;
-              }
-              router.back();
-            }}
             queryModeOptions={mockupQueryModeOptions}
             queryInputRef={inputRef}
             recentQueries={recentQueries}
diff --git a/src/components/clinical-dashboard/master-search-header.tsx b/src/components/clinical-dashboard/master-search-header.tsx
index 31c32d47aa..17d59eabdd 100644
--- a/src/components/clinical-dashboard/master-search-header.tsx
+++ b/src/components/clinical-dashboard/master-search-header.tsx
@@ -29,7 +29,6 @@ import {
   Search,
   Send,
   ShieldCheck,
-  ArrowLeft,
   X,
 } from "lucide-react";
 
@@ -197,8 +196,6 @@ export function MasterSearchHeader({
   desktopPageComposerSlotId,
   heroComposerBreakpoint = "all",
   mobileBottomSearchAddonSlotId,
-  mobileLeadingAction = "menu",
-  onMobileBack,
   hideOnScroll,
   onBottomComposerHiddenChange,
   showDesktopNewChat = true,
@@ -263,8 +260,6 @@ export function MasterSearchHeader({
   heroComposerBreakpoint?: "all" | "sm-up";
   /** Mobile/tablet slot rendered above the search pill for page-specific composer addons. */
   mobileBottomSearchAddonSlotId?: string;
-  mobileLeadingAction?: "menu" | "back";
-  onMobileBack?: () => void;
   /** Phone-only hide-on-scroll for the universal header and bottom search dock.
    *  "overlay" translates the sticky header away (host scrolls the document,
    *  content already flows beneath); "collapse" also releases the header's
@@ -604,7 +599,6 @@ export function MasterSearchHeader({
                           : "answer";
   const actionMenuItems = modeActionItemsFor(actionMenuSetId);
   const actionMenuButtonLabel = `Open ${selectedAppMode.label.toLowerCase()} options`;
-  const useMobileBackControl = mobileLeadingAction === "back";
 
   function currentUsesScopeSheet() {
     return window.matchMedia(scopeSheetMediaQuery).matches;
@@ -2031,20 +2025,16 @@ export function MasterSearchHeader({
         <div className="flex min-w-0 items-center gap-2 sm:gap-3">
           <button
             type="button"
-            onClick={useMobileBackControl ? onMobileBack : onOpenMobileSidebar}
+            onClick={onOpenMobileSidebar}
             className={cn(
               "universal-header-icon-control h-tap w-tap shrink-0 place-items-center rounded-full text-[color:var(--text-muted)] transition hover:bg-[color:var(--surface-subtle)] hover:text-[color:var(--text)] focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[color:var(--focus)]",
               // From md the desktop icon rail owns navigation, so the drawer
               // trigger is phone-only outside workflow headers.
-              isWorkflowHeader || useMobileBackControl ? "grid" : "grid md:hidden",
+              isWorkflowHeader ? "grid" : "grid md:hidden",
             )}
-            aria-label={useMobileBackControl ? "Go back" : "Open Clinical Guide menu"}
+            aria-label="Open Clinical Guide menu"
           >
-            {useMobileBackControl ? (
-              <ArrowLeft aria-hidden="true" className="h-5 w-5" />
-            ) : (
-              <Menu aria-hidden="true" className="h-5 w-5" />
-            )}
+            <Menu aria-hidden="true" className="h-5 w-5" />
           </button>
           {isServicesMode ? (
             <div className="hidden min-w-0 items-center gap-3 lg:flex">
diff --git a/tests/global-search-shell-back-href.test.ts b/tests/global-search-shell-back-href.test.ts
deleted file mode 100644
index cfe16fa623..0000000000
--- a/tests/global-search-shell-back-href.test.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-import { describe, expect, it } from "vitest";
-
-import { infoPageBackHref, mobileBackHref } from "@/components/clinical-dashboard/global-search-shell";
-
-describe("infoPageBackHref", () => {
-  it.each([
-    ["/services/community-team", "/services"],
-    ["/forms/12a", "/forms"],
-    ["/medications/lithium", "/?mode=prescribing"],
-    ["/differentials/diagnoses/delirium", "/differentials"],
-    ["/dsm/diagnoses/delirium", "/dsm"],
-    ["/specifiers/anxious-distress", "/specifiers"],
-    ["/formulation/example", "/formulation"],
-    ["/therapy-compass/cbt/brief", "/therapy-compass"],
-    ["/factsheets/lithium", "/factsheets"],
-    ["/documents/example", "/documents/search?mode=documents"],
-  ])("maps %s to its stable in-app parent", (pathname, expected) => {
-    expect(infoPageBackHref(pathname)).toBe(expected);
-  });
-
-  it("leaves non-detail routes on browser-history behaviour", () => {
-    expect(infoPageBackHref("/services")).toBeNull();
-    expect(infoPageBackHref("/privacy")).toBeNull();
-  });
-});
-
-describe("mobileBackHref", () => {
-  it("routes submitted differential search back to the differentials home with focus", () => {
-    expect(mobileBackHref("/differentials", "differentials", true)).toBe("/differentials?focus=1");
-  });
-
-  it("does not invent a target for non-submitted differential home visits", () => {
-    expect(mobileBackHref("/differentials", "differentials", false)).toBeNull();
-  });
-
-  it("still prefers info-page parents over mode-home fallbacks", () => {
-    expect(mobileBackHref("/differentials/diagnoses/delirium", "differentials", true)).toBe("/differentials");
-  });
-});