diff --git a/tsc/internal/transformers/estransforms/classfields.go b/tsc/internal/transformers/estransforms/classfields.go
index 68dc3950413d9..94671bdd4238e 100644
--- a/tsc/internal/transformers/estransforms/classfields.go
+++ b/tsc/internal/transformers/estransforms/classfields.go
@@ -686,9 +686,9 @@ func (tx *classFieldsTransformer) visitMethodOrAccessorDeclaration(node *ast.Nod
 	}
 
 	// leave invalid code untransformed
-	info := tx.accessPrivateIdentifier(node.Name())
+	info, _ := tx.getPrivateIdentifier(tx.getPrivateIdentifierEnvironment(), node.Name())
 	debug.Assert(info != nil, "Undeclared private name for property declaration.")
-	if !info.isValid {
+	if info.kind == printer.PrivateIdentifierKindUntransformed || !info.isValid {
 		return node
 	}
 
@@ -895,11 +895,11 @@ func (tx *classFieldsTransformer) transformAutoAccessor(node *ast.PropertyDeclar
 func (tx *classFieldsTransformer) transformPrivateFieldInitializer(node *ast.PropertyDeclaration) *ast.Node {
 	if tx.shouldTransformClassElementToWeakMap(node.AsNode()) {
 		// If we are transforming private elements into WeakMap/WeakSet, we should elide the node.
-		info := tx.accessPrivateIdentifier(node.Name())
+		info, _ := tx.getPrivateIdentifier(tx.getPrivateIdentifierEnvironment(), node.Name())
 		debug.Assert(info != nil, "Undeclared private name for property declaration.")
 
 		// Leave invalid code untransformed
-		if !info.isValid {
+		if info.kind == printer.PrivateIdentifierKindUntransformed || !info.isValid {
 			return node.AsNode()
 		}
 
diff --git a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).errors.txt b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).errors.txt
new file mode 100644
index 0000000000000..25f63760f051a
--- /dev/null
+++ b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).errors.txt
@@ -0,0 +1,66 @@
+esDecorators-classDeclaration-methods-staticPrivate.ts(14,12): error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(15,5): error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(16,5): error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(17,12): error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(18,12): error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(19,5): error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(20,5): error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(21,12): error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(22,16): error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(23,9): error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(24,9): error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(25,16): error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+
+
+==== esDecorators-classDeclaration-methods-staticPrivate.ts (12 errors) ====
+    declare let dec: any;
+    
+    class C {
+        @dec static #method1() {}
+    }
+    
+    @dec
+    class D {
+        static #method1() {}
+    }
+    
+    @dec
+    class E {
+        static #a() {}
+               ~~
+!!! error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+        #a() {}
+        ~~
+!!! error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+        #b() {}
+        ~~
+!!! error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+        static #b() {}
+               ~~
+!!! error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+        static #c = 0;
+               ~~
+!!! error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+        #c = 0;
+        ~~
+!!! error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+        #d = 0;
+        ~~
+!!! error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+        static #d = 0;
+               ~~
+!!! error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+        static get #e() { return 0; }
+                   ~~
+!!! error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+        set #e(value: number) {}
+            ~~
+!!! error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+        get #f() { return 0; }
+            ~~
+!!! error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+        static set #f(value: number) {}
+                   ~~
+!!! error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+    }
+    
\ No newline at end of file
diff --git a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).js b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).js
index 4db3b713a6ed3..33b81d3f1ca93 100644
--- a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).js
+++ b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2015).js
@@ -11,6 +11,22 @@ class C {
 class D {
     static #method1() {}
 }
+
+@dec
+class E {
+    static #a() {}
+    #a() {}
+    #b() {}
+    static #b() {}
+    static #c = 0;
+    #c = 0;
+    #d = 0;
+    static #d = 0;
+    static get #e() { return 0; }
+    set #e(value: number) {}
+    get #f() { return 0; }
+    static set #f(value: number) {}
+}
 
 
 //// [esDecorators-classDeclaration-methods-staticPrivate.js]
@@ -51,3 +67,45 @@ let D = (() => {
     })();
     return D = _classThis;
 })();
+let E = (() => {
+    var _E_instances, _E_a, _E_a_1, _E_b, _E_b_1, _E_c, _E_c_1, _E_d, _E_d_1, _E_e_get, _E_e_set, _E_f_get, _E_f_set;
+    let _classDecorators = [dec];
+    let _classDescriptor;
+    let _classExtraInitializers = [];
+    let _classThis;
+    var E = _classThis = class {
+        constructor() {
+            _E_instances.add(this);
+            _E_c_1.set(this, 0);
+            _E_d_1 = { value: 0 };
+        }
+        static #a() { }
+        #a() { }
+        #b() { }
+        static #b() { }
+        static #c = 0;
+        #c = 0;
+        #d = 0;
+        static #d = 0;
+        static get #e() { return 0; }
+        set #e(value) { }
+        get #f() { return 0; }
+        static set #f(value) { }
+    };
+    _E_c_1 = new WeakMap();
+    _E_d = new WeakMap();
+    _E_instances = new WeakSet();
+    __setFunctionName(_classThis, "E");
+    (() => {
+        const _metadata = typeof Symbol === "function" && Symbol.metadata ? Object.create(null) : void 0;
+        __esDecorate(null, _classDescriptor = { value: _classThis }, _classDecorators, { kind: "class", name: _classThis.name, metadata: _metadata }, null, _classExtraInitializers);
+        E = _classThis = _classDescriptor.value;
+        if (_metadata) Object.defineProperty(_classThis, Symbol.metadata, { enumerable: true, configurable: true, writable: true, value: _metadata });
+    })();
+    _E_c_1.set(_classThis, 0);
+    _E_d_1 = { value: 0 };
+    (() => {
+        __runInitializers(_classThis, _classExtraInitializers);
+    })();
+    return E = _classThis;
+})();
diff --git a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).errors.txt b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).errors.txt
new file mode 100644
index 0000000000000..25f63760f051a
--- /dev/null
+++ b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).errors.txt
@@ -0,0 +1,66 @@
+esDecorators-classDeclaration-methods-staticPrivate.ts(14,12): error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(15,5): error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(16,5): error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(17,12): error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(18,12): error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(19,5): error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(20,5): error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(21,12): error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(22,16): error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(23,9): error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(24,9): error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(25,16): error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+
+
+==== esDecorators-classDeclaration-methods-staticPrivate.ts (12 errors) ====
+    declare let dec: any;
+    
+    class C {
+        @dec static #method1() {}
+    }
+    
+    @dec
+    class D {
+        static #method1() {}
+    }
+    
+    @dec
+    class E {
+        static #a() {}
+               ~~
+!!! error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+        #a() {}
+        ~~
+!!! error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+        #b() {}
+        ~~
+!!! error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+        static #b() {}
+               ~~
+!!! error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+        static #c = 0;
+               ~~
+!!! error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+        #c = 0;
+        ~~
+!!! error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+        #d = 0;
+        ~~
+!!! error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+        static #d = 0;
+               ~~
+!!! error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+        static get #e() { return 0; }
+                   ~~
+!!! error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+        set #e(value: number) {}
+            ~~
+!!! error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+        get #f() { return 0; }
+            ~~
+!!! error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+        static set #f(value: number) {}
+                   ~~
+!!! error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+    }
+    
\ No newline at end of file
diff --git a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).js b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).js
index 63b4ea82d5828..b141c3d07250a 100644
--- a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).js
+++ b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=es2022).js
@@ -11,6 +11,22 @@ class C {
 class D {
     static #method1() {}
 }
+
+@dec
+class E {
+    static #a() {}
+    #a() {}
+    #b() {}
+    static #b() {}
+    static #c = 0;
+    #c = 0;
+    #d = 0;
+    static #d = 0;
+    static get #e() { return 0; }
+    set #e(value: number) {}
+    get #f() { return 0; }
+    static set #f(value: number) {}
+}
 
 
 //// [esDecorators-classDeclaration-methods-staticPrivate.js]
@@ -50,3 +66,36 @@ let D = (() => {
     };
     return D = _classThis;
 })();
+let E = (() => {
+    var _E_a, _E_b, _E_c, _E_d, _E_e_get, _E_f_set;
+    let _classDecorators = [dec];
+    let _classDescriptor;
+    let _classExtraInitializers = [];
+    let _classThis;
+    var E = class {
+        static { _classThis = this; }
+        static { __setFunctionName(this, "E"); }
+        static {
+            const _metadata = typeof Symbol === "function" && Symbol.metadata ? Object.create(null) : void 0;
+            __esDecorate(null, _classDescriptor = { value: _classThis }, _classDecorators, { kind: "class", name: _classThis.name, metadata: _metadata }, null, _classExtraInitializers);
+            E = _classThis = _classDescriptor.value;
+            if (_metadata) Object.defineProperty(_classThis, Symbol.metadata, { enumerable: true, configurable: true, writable: true, value: _metadata });
+        }
+        static #a() { }
+        #a() { }
+        #b() { }
+        static #b() { }
+        static #c = 0;
+        #c = 0;
+        #d = 0;
+        static #d = 0;
+        static get #e() { return 0; }
+        set #e(value) { }
+        get #f() { return 0; }
+        static set #f(value) { }
+        static {
+            __runInitializers(_classThis, _classExtraInitializers);
+        }
+    };
+    return E = _classThis;
+})();
diff --git a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).errors.txt b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).errors.txt
new file mode 100644
index 0000000000000..25f63760f051a
--- /dev/null
+++ b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).errors.txt
@@ -0,0 +1,66 @@
+esDecorators-classDeclaration-methods-staticPrivate.ts(14,12): error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(15,5): error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(16,5): error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(17,12): error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(18,12): error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(19,5): error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(20,5): error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(21,12): error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(22,16): error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(23,9): error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(24,9): error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+esDecorators-classDeclaration-methods-staticPrivate.ts(25,16): error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+
+
+==== esDecorators-classDeclaration-methods-staticPrivate.ts (12 errors) ====
+    declare let dec: any;
+    
+    class C {
+        @dec static #method1() {}
+    }
+    
+    @dec
+    class D {
+        static #method1() {}
+    }
+    
+    @dec
+    class E {
+        static #a() {}
+               ~~
+!!! error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+        #a() {}
+        ~~
+!!! error TS2804: Duplicate identifier '#a'. Static and instance elements cannot share the same private name.
+        #b() {}
+        ~~
+!!! error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+        static #b() {}
+               ~~
+!!! error TS2804: Duplicate identifier '#b'. Static and instance elements cannot share the same private name.
+        static #c = 0;
+               ~~
+!!! error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+        #c = 0;
+        ~~
+!!! error TS2804: Duplicate identifier '#c'. Static and instance elements cannot share the same private name.
+        #d = 0;
+        ~~
+!!! error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+        static #d = 0;
+               ~~
+!!! error TS2804: Duplicate identifier '#d'. Static and instance elements cannot share the same private name.
+        static get #e() { return 0; }
+                   ~~
+!!! error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+        set #e(value: number) {}
+            ~~
+!!! error TS2804: Duplicate identifier '#e'. Static and instance elements cannot share the same private name.
+        get #f() { return 0; }
+            ~~
+!!! error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+        static set #f(value: number) {}
+                   ~~
+!!! error TS2804: Duplicate identifier '#f'. Static and instance elements cannot share the same private name.
+    }
+    
\ No newline at end of file
diff --git a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).js b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).js
index 40084510a5fe9..c3bb3969ceabf 100644
--- a/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).js
+++ b/tsc/testdata/baselines/reference/conformance/esDecorators-classDeclaration-methods-staticPrivate(target=esnext).js
@@ -11,6 +11,22 @@ class C {
 class D {
     static #method1() {}
 }
+
+@dec
+class E {
+    static #a() {}
+    #a() {}
+    #b() {}
+    static #b() {}
+    static #c = 0;
+    #c = 0;
+    #d = 0;
+    static #d = 0;
+    static get #e() { return 0; }
+    set #e(value: number) {}
+    get #f() { return 0; }
+    static set #f(value: number) {}
+}
 
 
 //// [esDecorators-classDeclaration-methods-staticPrivate.js]
@@ -23,3 +39,18 @@ class C {
 class D {
     static #method1() { }
 }
+@dec
+class E {
+    static #a() { }
+    #a() { }
+    #b() { }
+    static #b() { }
+    static #c = 0;
+    #c = 0;
+    #d = 0;
+    static #d = 0;
+    static get #e() { return 0; }
+    set #e(value) { }
+    get #f() { return 0; }
+    static set #f(value) { }
+}
diff --git a/tsc/testdata/tests/cases/conformance/esDecorators/classDeclaration/methods/esDecorators-classDeclaration-methods-staticPrivate.ts b/tsc/testdata/tests/cases/conformance/esDecorators/classDeclaration/methods/esDecorators-classDeclaration-methods-staticPrivate.ts
index 89954a68bcc87..83b2759e7d1f9 100644
--- a/tsc/testdata/tests/cases/conformance/esDecorators/classDeclaration/methods/esDecorators-classDeclaration-methods-staticPrivate.ts
+++ b/tsc/testdata/tests/cases/conformance/esDecorators/classDeclaration/methods/esDecorators-classDeclaration-methods-staticPrivate.ts
@@ -12,3 +12,19 @@ class C {
 class D {
     static #method1() {}
 }
+
+@dec
+class E {
+    static #a() {}
+    #a() {}
+    #b() {}
+    static #b() {}
+    static #c = 0;
+    #c = 0;
+    #d = 0;
+    static #d = 0;
+    static get #e() { return 0; }
+    set #e(value: number) {}
+    get #f() { return 0; }
+    static set #f(value: number) {}
+}