diff --git a/cli/lsp/documents.rs b/cli/lsp/documents.rs
index d5acac8d7b4819..cbc839c46405f4 100644
--- a/cli/lsp/documents.rs
+++ b/cli/lsp/documents.rs
@@ -455,12 +455,17 @@ impl Document {
   pub fn is_diagnosable(&self) -> bool {
     matches!(
       self.media_type(),
-      // todo(#12410): Update with new media types for TS 4.5
       MediaType::JavaScript
         | MediaType::Jsx
+        | MediaType::Mjs
+        | MediaType::Cjs
         | MediaType::TypeScript
         | MediaType::Tsx
+        | MediaType::Mts
+        | MediaType::Cts
         | MediaType::Dts
+        | MediaType::Dmts
+        | MediaType::Dcts
     )
   }
 
diff --git a/cli/lsp/language_server.rs b/cli/lsp/language_server.rs
index 94cc98f603ba66..59755db8bb25ad 100644
--- a/cli/lsp/language_server.rs
+++ b/cli/lsp/language_server.rs
@@ -326,12 +326,17 @@ impl Inner {
     if specifier.scheme() == "asset" {
       matches!(
         MediaType::from(specifier),
-        // todo(#12410): Update with new media types for TS 4.5
         MediaType::JavaScript
           | MediaType::Jsx
+          | MediaType::Mjs
+          | MediaType::Cjs
           | MediaType::TypeScript
           | MediaType::Tsx
+          | MediaType::Mts
+          | MediaType::Cts
           | MediaType::Dts
+          | MediaType::Dmts
+          | MediaType::Dcts
       )
     } else {
       self
diff --git a/cli/tsc.rs b/cli/tsc.rs
index 184fbd144b2b1f..a35ca9e7daa36e 100644
--- a/cli/tsc.rs
+++ b/cli/tsc.rs
@@ -144,31 +144,26 @@ fn get_tsc_media_type(specifier: &ModuleSpecifier) -> MediaType {
         if let Some(os_str) = path.file_stem() {
           if let Some(file_name) = os_str.to_str() {
             if file_name.ends_with(".d") {
-              // todo(#12410): Use Dmts for TS 4.5
-              return MediaType::Dts;
+              return MediaType::Dmts;
             }
           }
         }
-        // todo(#12410): Use Mts for TS 4.5
-        MediaType::TypeScript
+        MediaType::Mts
       }
       Some("cts") => {
         if let Some(os_str) = path.file_stem() {
           if let Some(file_name) = os_str.to_str() {
             if file_name.ends_with(".d") {
-              // todo(#12410): Use Dcts for TS 4.5
-              return MediaType::Dts;
+              return MediaType::Dcts;
             }
           }
         }
-        // todo(#12410): Use Cts for TS 4.5
-        MediaType::TypeScript
+        MediaType::Cts
       }
       Some("tsx") => MediaType::Tsx,
       Some("js") => MediaType::JavaScript,
-      // todo(#12410): Use correct media type for TS 4.5
-      Some("mjs") => MediaType::JavaScript,
-      Some("cjs") => MediaType::JavaScript,
+      Some("mjs") => MediaType::Mjs,
+      Some("cjs") => MediaType::Cjs,
       Some("jsx") => MediaType::Jsx,
       _ => MediaType::Unknown,
     },