diff --git a/package.json b/package.json
index ea458d053aa8d..56e5706038415 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
         "node": ">=4.2.0"
     },
     "devDependencies": {
-        "@octokit/rest": "latest",
+        "@octokit/rest": "17.11.2",
         "@types/browserify": "latest",
         "@types/chai": "latest",
         "@types/convert-source-map": "latest",
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 0d2a17fc8c27a..12fbed724ec1f 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3856,16 +3856,21 @@ namespace ts {
         }
 
         function isTypeSymbolAccessible(typeSymbol: Symbol, enclosingDeclaration: Node | undefined): boolean {
-            const access = isSymbolAccessible(typeSymbol, enclosingDeclaration, SymbolFlags.Type, /*shouldComputeAliasesToMakeVisible*/ false);
+            const access = isSymbolAccessibleWorker(typeSymbol, enclosingDeclaration, SymbolFlags.Type, /*shouldComputeAliasesToMakeVisible*/ false, /*allowModules*/ true);
             return access.accessibility === SymbolAccessibility.Accessible;
         }
 
         function isValueSymbolAccessible(typeSymbol: Symbol, enclosingDeclaration: Node | undefined): boolean {
-            const access = isSymbolAccessible(typeSymbol, enclosingDeclaration, SymbolFlags.Value, /*shouldComputeAliasesToMakeVisible*/ false);
+            const access = isSymbolAccessibleWorker(typeSymbol, enclosingDeclaration, SymbolFlags.Value, /*shouldComputeAliasesToMakeVisible*/ false, /*allowModules*/ true);
             return access.accessibility === SymbolAccessibility.Accessible;
         }
 
-        function isAnySymbolAccessible(symbols: Symbol[] | undefined, enclosingDeclaration: Node | undefined, initialSymbol: Symbol, meaning: SymbolFlags, shouldComputeAliasesToMakeVisible: boolean): SymbolAccessibilityResult | undefined {
+        function isSymbolAccessibleByFlags(typeSymbol: Symbol, enclosingDeclaration: Node | undefined, flags: SymbolFlags): boolean {
+            const access = isSymbolAccessibleWorker(typeSymbol, enclosingDeclaration, flags, /*shouldComputeAliasesToMakeVisible*/ false, /*allowModules*/ false);
+            return access.accessibility === SymbolAccessibility.Accessible;
+        }
+
+        function isAnySymbolAccessible(symbols: Symbol[] | undefined, enclosingDeclaration: Node | undefined, initialSymbol: Symbol, meaning: SymbolFlags, shouldComputeAliasesToMakeVisible: boolean, allowModules: boolean): SymbolAccessibilityResult | undefined {
             if (!length(symbols)) return;
 
             let hadAccessibleChain: Symbol | undefined;
@@ -3880,7 +3885,7 @@ namespace ts {
                         return hasAccessibleDeclarations;
                     }
                 }
-                else {
+                else if (allowModules) {
                     if (some(symbol.declarations, hasNonGlobalAugmentationExternalModuleSymbol)) {
                         if (shouldComputeAliasesToMakeVisible) {
                             earlyModuleBail = true;
@@ -3920,7 +3925,7 @@ namespace ts {
                         containers = [getSymbolOfNode(firstDecl.parent)];
                     }
                 }
-                const parentResult = isAnySymbolAccessible(containers, enclosingDeclaration, initialSymbol, initialSymbol === symbol ? getQualifiedLeftMeaning(meaning) : meaning, shouldComputeAliasesToMakeVisible);
+                const parentResult = isAnySymbolAccessible(containers, enclosingDeclaration, initialSymbol, initialSymbol === symbol ? getQualifiedLeftMeaning(meaning) : meaning, shouldComputeAliasesToMakeVisible, allowModules);
                 if (parentResult) {
                     return parentResult;
                 }
@@ -3950,8 +3955,12 @@ namespace ts {
          * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
          */
         function isSymbolAccessible(symbol: Symbol | undefined, enclosingDeclaration: Node | undefined, meaning: SymbolFlags, shouldComputeAliasesToMakeVisible: boolean): SymbolAccessibilityResult {
+            return isSymbolAccessibleWorker(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible, /*allowModules*/ true);
+        }
+
+        function isSymbolAccessibleWorker(symbol: Symbol | undefined, enclosingDeclaration: Node | undefined, meaning: SymbolFlags, shouldComputeAliasesToMakeVisible: boolean, allowModules: boolean): SymbolAccessibilityResult {
             if (symbol && enclosingDeclaration) {
-                const result = isAnySymbolAccessible([symbol], enclosingDeclaration, symbol, meaning, shouldComputeAliasesToMakeVisible);
+                const result = isAnySymbolAccessible([symbol], enclosingDeclaration, symbol, meaning, shouldComputeAliasesToMakeVisible, allowModules);
                 if (result) {
                     return result;
                 }
@@ -6211,7 +6220,7 @@ namespace ts {
                     const constructSignatures = serializeSignatures(SignatureKind.Construct, interfaceType, baseType, SyntaxKind.ConstructSignature) as ConstructSignatureDeclaration[];
                     const indexSignatures = serializeIndexSignatures(interfaceType, baseType);
 
-                    const heritageClauses = !length(baseTypes) ? undefined : [createHeritageClause(SyntaxKind.ExtendsKeyword, mapDefined(baseTypes, b => trySerializeAsTypeReference(b)))];
+                    const heritageClauses = !length(baseTypes) ? undefined : [createHeritageClause(SyntaxKind.ExtendsKeyword, mapDefined(baseTypes, b => trySerializeAsTypeReference(b, SymbolFlags.Value)))];
                     addResult(createInterfaceDeclaration(
                         /*decorators*/ undefined,
                         /*modifiers*/ undefined,
@@ -6371,7 +6380,7 @@ namespace ts {
                     const typeParamDecls = map(localParams, p => typeParameterToDeclaration(p, context));
                     const classType = getDeclaredTypeOfClassOrInterface(symbol);
                     const baseTypes = getBaseTypes(classType);
-                    const implementsTypes = getImplementsTypes(classType);
+                    const implementsExpressions = mapDefined(getImplementsTypes(classType), serializeImplementedType);
                     const staticType = getTypeOfSymbol(symbol);
                     const isClass = !!staticType.symbol?.valueDeclaration && isClassLike(staticType.symbol.valueDeclaration);
                     const staticBaseType = isClass
@@ -6379,7 +6388,7 @@ namespace ts {
                         : anyType;
                     const heritageClauses = [
                         ...!length(baseTypes) ? [] : [createHeritageClause(SyntaxKind.ExtendsKeyword, map(baseTypes, b => serializeBaseType(b, staticBaseType, localName)))],
-                        ...!length(implementsTypes) ? [] : [createHeritageClause(SyntaxKind.ImplementsKeyword, map(implementsTypes, b => serializeBaseType(b, staticBaseType, localName)))]
+                        ...!length(implementsExpressions) ? [] : [createHeritageClause(SyntaxKind.ImplementsKeyword, implementsExpressions)]
                     ];
                     const symbolProps = getNonInterhitedProperties(classType, baseTypes, getPropertiesOfType(classType));
                     const publicSymbolProps = filter(symbolProps, s => {
@@ -6870,7 +6879,7 @@ namespace ts {
                 }
 
                 function serializeBaseType(t: Type, staticType: Type, rootName: string) {
-                    const ref = trySerializeAsTypeReference(t);
+                    const ref = trySerializeAsTypeReference(t, SymbolFlags.Value);
                     if (ref) {
                         return ref;
                     }
@@ -6882,16 +6891,17 @@ namespace ts {
                     return createExpressionWithTypeArguments(/*typeArgs*/ undefined, createIdentifier(tempName));
                 }
 
-                function trySerializeAsTypeReference(t: Type) {
+                function trySerializeAsTypeReference(t: Type, flags: SymbolFlags) {
                     let typeArgs: TypeNode[] | undefined;
                     let reference: Expression | undefined;
+
                     // We don't use `isValueSymbolAccessible` below. since that considers alternative containers (like modules)
                     // which we can't write out in a syntactically valid way as an expression
-                    if ((t as TypeReference).target && getAccessibleSymbolChain((t as TypeReference).target.symbol, enclosingDeclaration, SymbolFlags.Value, /*useOnlyExternalAliasing*/ false)) {
+                    if ((t as TypeReference).target && isSymbolAccessibleByFlags((t as TypeReference).target.symbol, enclosingDeclaration, flags)) {
                         typeArgs = map(getTypeArguments(t as TypeReference), t => typeToTypeNodeHelper(t, context));
                         reference = symbolToExpression((t as TypeReference).target.symbol, context, SymbolFlags.Type);
                     }
-                    else if (t.symbol && getAccessibleSymbolChain(t.symbol, enclosingDeclaration, SymbolFlags.Value, /*useOnlyExternalAliasing*/ false)) {
+                    else if (t.symbol && isSymbolAccessibleByFlags(t.symbol, enclosingDeclaration, flags)) {
                         reference = symbolToExpression(t.symbol, context, SymbolFlags.Type);
                     }
                     if (reference) {
@@ -6899,6 +6909,16 @@ namespace ts {
                     }
                 }
 
+                function serializeImplementedType(t: Type) {
+                    const ref = trySerializeAsTypeReference(t, SymbolFlags.Type);
+                    if (ref) {
+                        return ref;
+                    }
+                    if (t.symbol) {
+                        return createExpressionWithTypeArguments(/*typeArgs*/ undefined, symbolToExpression(t.symbol, context, SymbolFlags.Type));
+                    }
+                }
+
                 function getUnusedName(input: string, symbol?: Symbol): string {
                     if (symbol) {
                         if (context.remappedSymbolNames!.has("" + getSymbolId(symbol))) {
@@ -24063,7 +24083,7 @@ namespace ts {
                 // if jsx emit was not react as there wont be error being emitted
                 reactSym.isReferenced = SymbolFlags.All;
 
-                // If react symbol is alias, mark it as refereced
+                // If react symbol is alias, mark it as referenced
                 if (reactSym.flags & SymbolFlags.Alias && !getTypeOnlyAliasDeclaration(reactSym)) {
                     markAliasSymbolAsReferenced(reactSym);
                 }
diff --git a/tests/baselines/reference/jsdocImplements_namespacedInterface.js b/tests/baselines/reference/jsdocImplements_namespacedInterface.js
new file mode 100644
index 0000000000000..4a3e1ddf4e68a
--- /dev/null
+++ b/tests/baselines/reference/jsdocImplements_namespacedInterface.js
@@ -0,0 +1,37 @@
+//// [tests/cases/conformance/jsdoc/jsdocImplements_namespacedInterface.ts] ////
+
+//// [defs.d.ts]
+declare namespace N {
+    interface A {
+        mNumber(): number;
+    }
+    interface AT<T> {
+        gen(): T;
+    }
+}
+//// [a.js]
+/** @implements N.A */
+class B {
+    mNumber() {
+        return 0;
+    }
+}
+/** @implements {N.AT<string>} */
+class BAT {
+    gen() {
+        return "";
+    }
+}
+
+
+
+
+//// [a.d.ts]
+/** @implements N.A */
+declare class B implements N.A {
+    mNumber(): number;
+}
+/** @implements {N.AT<string>} */
+declare class BAT implements N.AT<string> {
+    gen(): string;
+}
diff --git a/tests/baselines/reference/jsdocImplements_namespacedInterface.symbols b/tests/baselines/reference/jsdocImplements_namespacedInterface.symbols
new file mode 100644
index 0000000000000..17697471add24
--- /dev/null
+++ b/tests/baselines/reference/jsdocImplements_namespacedInterface.symbols
@@ -0,0 +1,41 @@
+=== /defs.d.ts ===
+declare namespace N {
+>N : Symbol(N, Decl(defs.d.ts, 0, 0))
+
+    interface A {
+>A : Symbol(A, Decl(defs.d.ts, 0, 21))
+
+        mNumber(): number;
+>mNumber : Symbol(A.mNumber, Decl(defs.d.ts, 1, 17))
+    }
+    interface AT<T> {
+>AT : Symbol(AT, Decl(defs.d.ts, 3, 5))
+>T : Symbol(T, Decl(defs.d.ts, 4, 17))
+
+        gen(): T;
+>gen : Symbol(AT.gen, Decl(defs.d.ts, 4, 21))
+>T : Symbol(T, Decl(defs.d.ts, 4, 17))
+    }
+}
+=== /a.js ===
+/** @implements N.A */
+class B {
+>B : Symbol(B, Decl(a.js, 0, 0))
+
+    mNumber() {
+>mNumber : Symbol(B.mNumber, Decl(a.js, 1, 9))
+
+        return 0;
+    }
+}
+/** @implements {N.AT<string>} */
+class BAT {
+>BAT : Symbol(BAT, Decl(a.js, 5, 1))
+
+    gen() {
+>gen : Symbol(BAT.gen, Decl(a.js, 7, 11))
+
+        return "";
+    }
+}
+
diff --git a/tests/baselines/reference/jsdocImplements_namespacedInterface.types b/tests/baselines/reference/jsdocImplements_namespacedInterface.types
new file mode 100644
index 0000000000000..ca6fb4e58aad7
--- /dev/null
+++ b/tests/baselines/reference/jsdocImplements_namespacedInterface.types
@@ -0,0 +1,35 @@
+=== /defs.d.ts ===
+declare namespace N {
+    interface A {
+        mNumber(): number;
+>mNumber : () => number
+    }
+    interface AT<T> {
+        gen(): T;
+>gen : () => T
+    }
+}
+=== /a.js ===
+/** @implements N.A */
+class B {
+>B : B
+
+    mNumber() {
+>mNumber : () => number
+
+        return 0;
+>0 : 0
+    }
+}
+/** @implements {N.AT<string>} */
+class BAT {
+>BAT : BAT
+
+    gen() {
+>gen : () => string
+
+        return "";
+>"" : ""
+    }
+}
+
diff --git a/tests/cases/conformance/jsdoc/jsdocImplements_namespacedInterface.ts b/tests/cases/conformance/jsdoc/jsdocImplements_namespacedInterface.ts
new file mode 100644
index 0000000000000..c298e6685a509
--- /dev/null
+++ b/tests/cases/conformance/jsdoc/jsdocImplements_namespacedInterface.ts
@@ -0,0 +1,28 @@
+// @allowJs: true
+// @checkJs: true
+// @declaration: true
+// @emitDeclarationOnly: true
+// @outDir: ./out
+
+// @Filename: /defs.d.ts
+declare namespace N {
+    interface A {
+        mNumber(): number;
+    }
+    interface AT<T> {
+        gen(): T;
+    }
+}
+// @Filename: /a.js
+/** @implements N.A */
+class B {
+    mNumber() {
+        return 0;
+    }
+}
+/** @implements {N.AT<string>} */
+class BAT {
+    gen() {
+        return "";
+    }
+}