diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 0bedc9f404a..33ff04697f9 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -10241,8 +10241,13 @@ namespace ts {
                 return unknownType;
             }
 
-            if (noUnusedIdentifiers && !isInAmbientContext(node)) {
-                prop.isReferenced = true;
+            if (noUnusedIdentifiers && (prop.flags & SymbolFlags.ClassMember)) {
+                if (prop.flags & SymbolFlags.Instantiated) {
+                    getSymbolLinks(prop).target.isReferenced = true;
+                }
+                else {
+                    prop.isReferenced = true;
+                }
             }
 
             getNodeLinks(node).resolvedSymbol = prop;
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index a3d7fd4823d..7d7e92f27c3 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2107,6 +2107,8 @@ namespace ts {
         PropertyOrAccessor = Property | Accessor,
         Export = ExportNamespace | ExportType | ExportValue,
 
+        ClassMember = Method | Accessor | Property,
+
         /* @internal */
         // The set of things we consider semantically classifiable.  Used to speed up the LS during
         // classification.
diff --git a/tests/baselines/reference/unusedPrivateMembers.js b/tests/baselines/reference/unusedPrivateMembers.js
new file mode 100644
index 00000000000..cdb540349c3
--- /dev/null
+++ b/tests/baselines/reference/unusedPrivateMembers.js
@@ -0,0 +1,114 @@
+//// [unusedPrivateMembers.ts]
+
+class Test1 {
+    private initializeInternal() {
+    }
+
+    public test() {
+        var x = new Test1();
+        x.initializeInternal();
+    }
+}
+
+class Test2 {
+    private p = 0;
+    public test() {
+        var x = new Test2();
+        x.p;
+    }
+}
+
+class Test3 {
+    private get x () {
+        return 0;
+    }
+
+    public test() {
+        var x = new Test3();
+        x.x;
+    }
+}
+
+class Test4 {
+    private set x(v) {
+        v;
+    }
+
+    public test() {
+        var x = new Test4();
+        x.x;
+    }
+}
+
+class Test5<T> {
+    private p: T;
+    public test() {
+        var x = new Test5<number>();
+        x.p;
+    }
+}
+
+
+//// [unusedPrivateMembers.js]
+var Test1 = (function () {
+    function Test1() {
+    }
+    Test1.prototype.initializeInternal = function () {
+    };
+    Test1.prototype.test = function () {
+        var x = new Test1();
+        x.initializeInternal();
+    };
+    return Test1;
+}());
+var Test2 = (function () {
+    function Test2() {
+        this.p = 0;
+    }
+    Test2.prototype.test = function () {
+        var x = new Test2();
+        x.p;
+    };
+    return Test2;
+}());
+var Test3 = (function () {
+    function Test3() {
+    }
+    Object.defineProperty(Test3.prototype, "x", {
+        get: function () {
+            return 0;
+        },
+        enumerable: true,
+        configurable: true
+    });
+    Test3.prototype.test = function () {
+        var x = new Test3();
+        x.x;
+    };
+    return Test3;
+}());
+var Test4 = (function () {
+    function Test4() {
+    }
+    Object.defineProperty(Test4.prototype, "x", {
+        set: function (v) {
+            v;
+        },
+        enumerable: true,
+        configurable: true
+    });
+    Test4.prototype.test = function () {
+        var x = new Test4();
+        x.x;
+    };
+    return Test4;
+}());
+var Test5 = (function () {
+    function Test5() {
+    }
+    Test5.prototype.test = function () {
+        var x = new Test5();
+        x.p;
+    };
+    return Test5;
+}());
diff --git a/tests/baselines/reference/unusedPrivateMembers.symbols b/tests/baselines/reference/unusedPrivateMembers.symbols
new file mode 100644
index 00000000000..0d4426a594a
--- /dev/null
+++ b/tests/baselines/reference/unusedPrivateMembers.symbols
@@ -0,0 +1,113 @@
+=== tests/cases/compiler/unusedPrivateMembers.ts ===
+
+class Test1 {
+>Test1 : Symbol(Test1, Decl(unusedPrivateMembers.ts, 0, 0))
+
+    private initializeInternal() {
+>initializeInternal : Symbol(Test1.initializeInternal, Decl(unusedPrivateMembers.ts, 1, 13))
+    }
+
+    public test() {
+>test : Symbol(Test1.test, Decl(unusedPrivateMembers.ts, 3, 5))
+
+        var x = new Test1();
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 6, 11))
+>Test1 : Symbol(Test1, Decl(unusedPrivateMembers.ts, 0, 0))
+
+        x.initializeInternal();
+>x.initializeInternal : Symbol(Test1.initializeInternal, Decl(unusedPrivateMembers.ts, 1, 13))
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 6, 11))
+>initializeInternal : Symbol(Test1.initializeInternal, Decl(unusedPrivateMembers.ts, 1, 13))
+    }
+}
+
+class Test2 {
+>Test2 : Symbol(Test2, Decl(unusedPrivateMembers.ts, 9, 1))
+
+    private p = 0;
+>p : Symbol(Test2.p, Decl(unusedPrivateMembers.ts, 11, 13))
+
+    public test() {
+>test : Symbol(Test2.test, Decl(unusedPrivateMembers.ts, 12, 18))
+
+        var x = new Test2();
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 14, 11))
+>Test2 : Symbol(Test2, Decl(unusedPrivateMembers.ts, 9, 1))
+
+        x.p;
+>x.p : Symbol(Test2.p, Decl(unusedPrivateMembers.ts, 11, 13))
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 14, 11))
+>p : Symbol(Test2.p, Decl(unusedPrivateMembers.ts, 11, 13))
+    }
+}
+
+class Test3 {
+>Test3 : Symbol(Test3, Decl(unusedPrivateMembers.ts, 17, 1))
+
+    private get x () {
+>x : Symbol(Test3.x, Decl(unusedPrivateMembers.ts, 19, 13))
+
+        return 0;
+    }
+
+    public test() {
+>test : Symbol(Test3.test, Decl(unusedPrivateMembers.ts, 22, 5))
+
+        var x = new Test3();
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 25, 11))
+>Test3 : Symbol(Test3, Decl(unusedPrivateMembers.ts, 17, 1))
+
+        x.x;
+>x.x : Symbol(Test3.x, Decl(unusedPrivateMembers.ts, 19, 13))
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 25, 11))
+>x : Symbol(Test3.x, Decl(unusedPrivateMembers.ts, 19, 13))
+    }
+}
+
+class Test4 {
+>Test4 : Symbol(Test4, Decl(unusedPrivateMembers.ts, 28, 1))
+
+    private set x(v) {
+>x : Symbol(Test4.x, Decl(unusedPrivateMembers.ts, 30, 13))
+>v : Symbol(v, Decl(unusedPrivateMembers.ts, 31, 18))
+
+        v;
+>v : Symbol(v, Decl(unusedPrivateMembers.ts, 31, 18))
+    }
+
+    public test() {
+>test : Symbol(Test4.test, Decl(unusedPrivateMembers.ts, 33, 5))
+
+        var x = new Test4();
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 36, 11))
+>Test4 : Symbol(Test4, Decl(unusedPrivateMembers.ts, 28, 1))
+
+        x.x;
+>x.x : Symbol(Test4.x, Decl(unusedPrivateMembers.ts, 30, 13))
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 36, 11))
+>x : Symbol(Test4.x, Decl(unusedPrivateMembers.ts, 30, 13))
+    }
+}
+
+class Test5<T> {
+>Test5 : Symbol(Test5, Decl(unusedPrivateMembers.ts, 39, 1))
+>T : Symbol(T, Decl(unusedPrivateMembers.ts, 41, 12))
+
+    private p: T;
+>p : Symbol(Test5.p, Decl(unusedPrivateMembers.ts, 41, 16))
+>T : Symbol(T, Decl(unusedPrivateMembers.ts, 41, 12))
+
+    public test() {
+>test : Symbol(Test5.test, Decl(unusedPrivateMembers.ts, 42, 17))
+
+        var x = new Test5<number>();
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 44, 11))
+>Test5 : Symbol(Test5, Decl(unusedPrivateMembers.ts, 39, 1))
+
+        x.p;
+>x.p : Symbol(Test5.p, Decl(unusedPrivateMembers.ts, 41, 16))
+>x : Symbol(x, Decl(unusedPrivateMembers.ts, 44, 11))
+>p : Symbol(Test5.p, Decl(unusedPrivateMembers.ts, 41, 16))
+    }
+}
+
diff --git a/tests/baselines/reference/unusedPrivateMembers.types b/tests/baselines/reference/unusedPrivateMembers.types
new file mode 100644
index 00000000000..1d303068f24
--- /dev/null
+++ b/tests/baselines/reference/unusedPrivateMembers.types
@@ -0,0 +1,121 @@
+=== tests/cases/compiler/unusedPrivateMembers.ts ===
+
+class Test1 {
+>Test1 : Test1
+
+    private initializeInternal() {
+>initializeInternal : () => void
+    }
+
+    public test() {
+>test : () => void
+
+        var x = new Test1();
+>x : Test1
+>new Test1() : Test1
+>Test1 : typeof Test1
+
+        x.initializeInternal();
+>x.initializeInternal() : void
+>x.initializeInternal : () => void
+>x : Test1
+>initializeInternal : () => void
+    }
+}
+
+class Test2 {
+>Test2 : Test2
+
+    private p = 0;
+>p : number
+>0 : number
+
+    public test() {
+>test : () => void
+
+        var x = new Test2();
+>x : Test2
+>new Test2() : Test2
+>Test2 : typeof Test2
+
+        x.p;
+>x.p : number
+>x : Test2
+>p : number
+    }
+}
+
+class Test3 {
+>Test3 : Test3
+
+    private get x () {
+>x : number
+
+        return 0;
+>0 : number
+    }
+
+    public test() {
+>test : () => void
+
+        var x = new Test3();
+>x : Test3
+>new Test3() : Test3
+>Test3 : typeof Test3
+
+        x.x;
+>x.x : number
+>x : Test3
+>x : number
+    }
+}
+
+class Test4 {
+>Test4 : Test4
+
+    private set x(v) {
+>x : any
+>v : any
+
+        v;
+>v : any
+    }
+
+    public test() {
+>test : () => void
+
+        var x = new Test4();
+>x : Test4
+>new Test4() : Test4
+>Test4 : typeof Test4
+
+        x.x;
+>x.x : any
+>x : Test4
+>x : any
+    }
+}
+
+class Test5<T> {
+>Test5 : Test5<T>
+>T : T
+
+    private p: T;
+>p : T
+>T : T
+
+    public test() {
+>test : () => void
+
+        var x = new Test5<number>();
+>x : Test5<number>
+>new Test5<number>() : Test5<number>
+>Test5 : typeof Test5
+
+        x.p;
+>x.p : number
+>x : Test5<number>
+>p : number
+    }
+}
+
diff --git a/tests/cases/compiler/unusedPrivateMembers.ts b/tests/cases/compiler/unusedPrivateMembers.ts
new file mode 100644
index 00000000000..ab4e5ba9bca
--- /dev/null
+++ b/tests/cases/compiler/unusedPrivateMembers.ts
@@ -0,0 +1,51 @@
+//@noUnusedLocals:true
+//@noUnusedParameters:true
+//@target:ES5
+
+class Test1 {
+    private initializeInternal() {
+    }
+
+    public test() {
+        var x = new Test1();
+        x.initializeInternal();
+    }
+}
+
+class Test2 {
+    private p = 0;
+    public test() {
+        var x = new Test2();
+        x.p;
+    }
+}
+
+class Test3 {
+    private get x () {
+        return 0;
+    }
+
+    public test() {
+        var x = new Test3();
+        x.x;
+    }
+}
+
+class Test4 {
+    private set x(v) {
+        v;
+    }
+
+    public test() {
+        var x = new Test4();
+        x.x;
+    }
+}
+
+class Test5<T> {
+    private p: T;
+    public test() {
+        var x = new Test5<number>();
+        x.p;
+    }
+}