diff --git a/src/tint/ast/identifier.cc b/src/tint/ast/identifier.cc
new file mode 100644
index 0000000..8b8c3f5
--- /dev/null
+++ b/src/tint/ast/identifier.cc
@@ -0,0 +1,40 @@
+// Copyright 2023 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/tint/ast/identifier.h"
+
+#include "src/tint/program_builder.h"
+
+TINT_INSTANTIATE_TYPEINFO(tint::ast::Identifier);
+
+namespace tint::ast {
+
+Identifier::Identifier(ProgramID pid, NodeID nid, const Source& src, Symbol sym)
+    : Base(pid, nid, src), symbol(sym) {
+    TINT_ASSERT_PROGRAM_IDS_EQUAL_IF_VALID(AST, symbol, program_id);
+    TINT_ASSERT(AST, symbol.IsValid());
+}
+
+Identifier::Identifier(Identifier&&) = default;
+
+Identifier::~Identifier() = default;
+
+const Identifier* Identifier::Clone(CloneContext* ctx) const {
+    // Clone arguments outside of create() call to have deterministic ordering
+    auto src = ctx->Clone(source);
+    auto sym = ctx->Clone(symbol);
+    return ctx->dst->create<Identifier>(src, sym);
+}
+
+}  // namespace tint::ast