diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 77f35376da7..75be3647422 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -710,6 +710,7 @@ import {
     isPrivateIdentifier,
     isPrivateIdentifierClassElementDeclaration,
     isPrivateIdentifierPropertyAccessExpression,
+    isPrivateIdentifierSymbol,
     isPropertyAccessEntityNameExpression,
     isPropertyAccessExpression,
     isPropertyAccessOrQualifiedName,
@@ -7610,6 +7611,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
                         if (getDeclarationModifierFlagsFromSymbol(propertySymbol) & (ModifierFlags.Private | ModifierFlags.Protected) && context.tracker.reportPrivateInBaseOfClassExpression) {
                             context.tracker.reportPrivateInBaseOfClassExpression(unescapeLeadingUnderscores(propertySymbol.escapedName));
                         }
+                        if (isPrivateIdentifierSymbol(propertySymbol) && context.tracker.reportPrivateInBaseOfClassExpression) {
+                            context.tracker.reportPrivateInBaseOfClassExpression(idText((propertySymbol.valueDeclaration! as NamedDeclaration).name! as PrivateIdentifier));
+                        }
                     }
                     if (checkTruncationLength(context) && (i + 2 < properties.length - 1)) {
                         context.out.truncated = true;
diff --git a/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.errors.txt b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.errors.txt
new file mode 100644
index 00000000000..c5c1abb1bc2
--- /dev/null
+++ b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.errors.txt
@@ -0,0 +1,31 @@
+privateFieldsInClassExpressionDeclaration.ts(1,14): error TS4094: Property '#context' of exported anonymous class type may not be private or protected.
+privateFieldsInClassExpressionDeclaration.ts(1,14): error TS4094: Property '#method' of exported anonymous class type may not be private or protected.
+privateFieldsInClassExpressionDeclaration.ts(8,14): error TS4094: Property '#instancePrivate' of exported anonymous class type may not be private or protected.
+privateFieldsInClassExpressionDeclaration.ts(8,14): error TS4094: Property '#staticPrivate' of exported anonymous class type may not be private or protected.
+
+
+==== privateFieldsInClassExpressionDeclaration.ts (4 errors) ====
+    export const ClassExpression = class {
+                 ~~~~~~~~~~~~~~~
+!!! error TS4094: Property '#context' of exported anonymous class type may not be private or protected.
+!!! related TS9027 privateFieldsInClassExpressionDeclaration.ts:1:14: Add a type annotation to the variable ClassExpression.
+                 ~~~~~~~~~~~~~~~
+!!! error TS4094: Property '#method' of exported anonymous class type may not be private or protected.
+!!! related TS9027 privateFieldsInClassExpressionDeclaration.ts:1:14: Add a type annotation to the variable ClassExpression.
+        #context = 0;
+        #method() { return 42; }
+        public value = 1;
+    };
+    
+    // Additional test with static private fields
+    export const ClassExpressionStatic = class {
+                 ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS4094: Property '#instancePrivate' of exported anonymous class type may not be private or protected.
+!!! related TS9027 privateFieldsInClassExpressionDeclaration.ts:8:14: Add a type annotation to the variable ClassExpressionStatic.
+                 ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS4094: Property '#staticPrivate' of exported anonymous class type may not be private or protected.
+!!! related TS9027 privateFieldsInClassExpressionDeclaration.ts:8:14: Add a type annotation to the variable ClassExpressionStatic.
+        static #staticPrivate = "hidden";
+        #instancePrivate = true;
+        public exposed = "visible";
+    };
\ No newline at end of file
diff --git a/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.js b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.js
new file mode 100644
index 00000000000..c801596e5ff
--- /dev/null
+++ b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.js
@@ -0,0 +1,44 @@
+//// [tests/cases/compiler/privateFieldsInClassExpressionDeclaration.ts] ////
+
+//// [privateFieldsInClassExpressionDeclaration.ts]
+export const ClassExpression = class {
+    #context = 0;
+    #method() { return 42; }
+    public value = 1;
+};
+
+// Additional test with static private fields
+export const ClassExpressionStatic = class {
+    static #staticPrivate = "hidden";
+    #instancePrivate = true;
+    public exposed = "visible";
+};
+
+//// [privateFieldsInClassExpressionDeclaration.js]
+var __setFunctionName = (this && this.__setFunctionName) || function (f, name, prefix) {
+    if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
+    return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
+};
+var _instances, _context, _method, _a, _b, _ClassExpressionStatic_staticPrivate, _ClassExpressionStatic_instancePrivate;
+export const ClassExpression = (_a = class {
+        constructor() {
+            _instances.add(this);
+            _context.set(this, 0);
+            this.value = 1;
+        }
+    },
+    _context = new WeakMap(),
+    _instances = new WeakSet(),
+    _method = function _method() { return 42; },
+    _a);
+// Additional test with static private fields
+export const ClassExpressionStatic = (_b = class {
+        constructor() {
+            _ClassExpressionStatic_instancePrivate.set(this, true);
+            this.exposed = "visible";
+        }
+    },
+    _ClassExpressionStatic_instancePrivate = new WeakMap(),
+    __setFunctionName(_b, "ClassExpressionStatic"),
+    _ClassExpressionStatic_staticPrivate = { value: "hidden" },
+    _b);
diff --git a/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.symbols b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.symbols
new file mode 100644
index 00000000000..395e587de77
--- /dev/null
+++ b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.symbols
@@ -0,0 +1,31 @@
+//// [tests/cases/compiler/privateFieldsInClassExpressionDeclaration.ts] ////
+
+=== privateFieldsInClassExpressionDeclaration.ts ===
+export const ClassExpression = class {
+>ClassExpression : Symbol(ClassExpression, Decl(privateFieldsInClassExpressionDeclaration.ts, 0, 12))
+
+    #context = 0;
+>#context : Symbol(ClassExpression.#context, Decl(privateFieldsInClassExpressionDeclaration.ts, 0, 38))
+
+    #method() { return 42; }
+>#method : Symbol(ClassExpression.#method, Decl(privateFieldsInClassExpressionDeclaration.ts, 1, 17))
+
+    public value = 1;
+>value : Symbol(ClassExpression.value, Decl(privateFieldsInClassExpressionDeclaration.ts, 2, 28))
+
+};
+
+// Additional test with static private fields
+export const ClassExpressionStatic = class {
+>ClassExpressionStatic : Symbol(ClassExpressionStatic, Decl(privateFieldsInClassExpressionDeclaration.ts, 7, 12))
+
+    static #staticPrivate = "hidden";
+>#staticPrivate : Symbol(ClassExpressionStatic.#staticPrivate, Decl(privateFieldsInClassExpressionDeclaration.ts, 7, 44))
+
+    #instancePrivate = true;
+>#instancePrivate : Symbol(ClassExpressionStatic.#instancePrivate, Decl(privateFieldsInClassExpressionDeclaration.ts, 8, 37))
+
+    public exposed = "visible";
+>exposed : Symbol(ClassExpressionStatic.exposed, Decl(privateFieldsInClassExpressionDeclaration.ts, 9, 28))
+
+};
diff --git a/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.types b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.types
new file mode 100644
index 00000000000..2377b1ba091
--- /dev/null
+++ b/tests/baselines/reference/privateFieldsInClassExpressionDeclaration.types
@@ -0,0 +1,55 @@
+//// [tests/cases/compiler/privateFieldsInClassExpressionDeclaration.ts] ////
+
+=== privateFieldsInClassExpressionDeclaration.ts ===
+export const ClassExpression = class {
+>ClassExpression : typeof ClassExpression
+>                : ^^^^^^^^^^^^^^^^^^^^^^
+>class {    #context = 0;    #method() { return 42; }    public value = 1;} : typeof ClassExpression
+>                                                                           : ^^^^^^^^^^^^^^^^^^^^^^
+
+    #context = 0;
+>#context : number
+>         : ^^^^^^
+>0 : 0
+>  : ^
+
+    #method() { return 42; }
+>#method : () => number
+>        : ^^^^^^^^^^^^
+>42 : 42
+>   : ^^
+
+    public value = 1;
+>value : number
+>      : ^^^^^^
+>1 : 1
+>  : ^
+
+};
+
+// Additional test with static private fields
+export const ClassExpressionStatic = class {
+>ClassExpressionStatic : typeof ClassExpressionStatic
+>                      : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+>class {    static #staticPrivate = "hidden";    #instancePrivate = true;    public exposed = "visible";} : typeof ClassExpressionStatic
+>                                                                                                         : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    static #staticPrivate = "hidden";
+>#staticPrivate : string
+>               : ^^^^^^
+>"hidden" : "hidden"
+>         : ^^^^^^^^
+
+    #instancePrivate = true;
+>#instancePrivate : boolean
+>                 : ^^^^^^^
+>true : true
+>     : ^^^^
+
+    public exposed = "visible";
+>exposed : string
+>        : ^^^^^^
+>"visible" : "visible"
+>          : ^^^^^^^^^
+
+};
diff --git a/tests/cases/compiler/privateFieldsInClassExpressionDeclaration.ts b/tests/cases/compiler/privateFieldsInClassExpressionDeclaration.ts
new file mode 100644
index 00000000000..1b46bf769ac
--- /dev/null
+++ b/tests/cases/compiler/privateFieldsInClassExpressionDeclaration.ts
@@ -0,0 +1,15 @@
+// @target: ES2015
+// @declaration: true
+
+export const ClassExpression = class {
+    #context = 0;
+    #method() { return 42; }
+    public value = 1;
+};
+
+// Additional test with static private fields
+export const ClassExpressionStatic = class {
+    static #staticPrivate = "hidden";
+    #instancePrivate = true;
+    public exposed = "visible";
+};
\ No newline at end of file