diff --git a/ChangeLog.md b/ChangeLog.md
index 03c9c1cd94..905732712e 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -16,8 +16,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix analyzer [RCS1046](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1046) to report `async void` methods without `Async` suffix ([PR](https://github.com/dotnet/roslynator/pull/1790))
 - Fix analyzer [RCS1265](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1265) to not report catch clauses with a `when` filter ([PR](https://github.com/dotnet/roslynator/pull/1789))
 - Fix analyzer [RCS0034](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS0034) for types with a primary constructor and multiple constraint clauses ([PR](https://github.com/dotnet/roslynator/pull/1791))
-- [CLI] Fix GitLab output format to use relative paths, forward slashes, and 1-based line numbers ([PR](https://github.com/dotnet/roslynator/pull/1792))
 - Fix analyzer [RCS1231](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1231) to not report `CancellationToken` in sync methods returning `Task` ([PR](https://github.com/dotnet/roslynator/pull/1802))
+- [CLI] Fix GitLab output format to use relative paths, forward slashes, and 1-based line numbers ([PR](https://github.com/dotnet/roslynator/pull/1792))
+- [CLI] Fix `generate-doc` to omit internal interfaces from type declarations and the Implements section ([PR](https://github.com/dotnet/roslynator/pull/1801))
 
 ## [4.16.0] - 2026-08-08
 
diff --git a/src/Documentation/Documentation.csproj b/src/Documentation/Documentation.csproj
index 024e9f2ff0..8c602b3660 100644
--- a/src/Documentation/Documentation.csproj
+++ b/src/Documentation/Documentation.csproj
@@ -57,4 +57,4 @@ Roslynator.Documentation.DocumentationGenerator</Description>
     </AssemblyAttribute>
   </ItemGroup>
 
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/Documentation/DocumentationGenerator.cs b/src/Documentation/DocumentationGenerator.cs
index e213d9cf24..7a6476dd48 100644
--- a/src/Documentation/DocumentationGenerator.cs
+++ b/src/Documentation/DocumentationGenerator.cs
@@ -1052,7 +1052,7 @@ void GenerateMemberContent(DocumentationWriter writer, ISymbol symbol, int headi
                     }
                     case MemberDocumentationParts.Implements:
                     {
-                        writer.WriteImplementedInterfaceMembers(symbol.FindImplementedInterfaceMembers());
+                        writer.WriteImplementedInterfaceMembers(symbol.FindImplementedInterfaceMembers().Where(f => f.IsPubliclyVisible()));
                         break;
                     }
                     case MemberDocumentationParts.Attributes:
diff --git a/src/Documentation/DocumentationWriter.cs b/src/Documentation/DocumentationWriter.cs
index c6df7d2ee9..96146327e1 100644
--- a/src/Documentation/DocumentationWriter.cs
+++ b/src/Documentation/DocumentationWriter.cs
@@ -532,7 +532,8 @@ public virtual void WriteDefinition(ISymbol symbol)
                 | SymbolDisplayTypeDeclarationOptions.IncludeModifiers
                 | SymbolDisplayTypeDeclarationOptions.BaseList,
             additionalOptions: additionalOptions,
-            shouldDisplayAttribute: (s, a) => DocumentationModel.Filter.IsMatch(s, a));
+            shouldDisplayAttribute: (s, a) => DocumentationModel.Filter.IsMatch(s, a),
+            shouldDisplayInterface: f => f.IsPubliclyVisible());
 
         StringBuilder sb = StringBuilderCache.GetInstance(attributesParts.Length + definitionParts.Length);
 
@@ -1491,7 +1492,7 @@ void WriteOverrides(ISymbol symbol)
 
         void WriteImplements(ISymbol symbol)
         {
-            using (IEnumerator<ISymbol> en = symbol.FindImplementedInterfaceMembers().GetEnumerator())
+            using (IEnumerator<ISymbol> en = symbol.FindImplementedInterfaceMembers().Where(f => f.IsPubliclyVisible()).GetEnumerator())
             {
                 if (en.MoveNext())
                 {
diff --git a/src/Documentation/SymbolDefinitionDisplay.cs b/src/Documentation/SymbolDefinitionDisplay.cs
index 1e7411f759..e5df33b617 100644
--- a/src/Documentation/SymbolDefinitionDisplay.cs
+++ b/src/Documentation/SymbolDefinitionDisplay.cs
@@ -18,7 +18,8 @@ public static ImmutableArray<SymbolDisplayPart> GetDisplayParts(
         SymbolDisplayFormat format,
         SymbolDisplayTypeDeclarationOptions typeDeclarationOptions = SymbolDisplayTypeDeclarationOptions.None,
         SymbolDisplayAdditionalOptions additionalOptions = SymbolDisplayAdditionalOptions.None,
-        Func<ISymbol, AttributeData, bool> shouldDisplayAttribute = null)
+        Func<ISymbol, AttributeData, bool> shouldDisplayAttribute = null,
+        Func<INamedTypeSymbol, bool> shouldDisplayInterface = null)
     {
         ImmutableArray<SymbolDisplayPart> parts;
 
@@ -62,6 +63,9 @@ public static ImmutableArray<SymbolDisplayPart> GetDisplayParts(
                 {
                     interfaces = interfaces.RemoveAll(f => f.SpecialType == SpecialType.System_Collections_IEnumerable);
                 }
+
+                if (shouldDisplayInterface is not null)
+                    interfaces = interfaces.RemoveAll(f => !shouldDisplayInterface(f));
             }
         }
 
diff --git a/src/Documentation/SymbolDefinitionWriter.cs b/src/Documentation/SymbolDefinitionWriter.cs
index 6f03fcc30c..6f3e0c3cdf 100644
--- a/src/Documentation/SymbolDefinitionWriter.cs
+++ b/src/Documentation/SymbolDefinitionWriter.cs
@@ -969,7 +969,8 @@ public virtual void WriteDefinition(ISymbol symbol, SymbolDisplayFormat format)
             format ?? DefinitionFormat,
             typeDeclarationOptions: GetTypeDeclarationOptions(),
             additionalOptions: GetAdditionalOptions(),
-            shouldDisplayAttribute: (s, a) => Filter.IsMatch(s, a));
+            shouldDisplayAttribute: (s, a) => Filter.IsMatch(s, a),
+            shouldDisplayInterface: f => Filter.IsMatch(f));
 
         WriteDefinition(symbol, parts);
     }
diff --git a/src/Documentation/TypeDocumentationModel.cs b/src/Documentation/TypeDocumentationModel.cs
index 2a53e80021..118379ba89 100644
--- a/src/Documentation/TypeDocumentationModel.cs
+++ b/src/Documentation/TypeDocumentationModel.cs
@@ -334,14 +334,20 @@ public IEnumerable<INamedTypeSymbol> GetImplementedInterfaces(bool omitIEnumerab
             {
                 foreach (INamedTypeSymbol interfaceType in allInterfaces)
                 {
-                    if (interfaceType.SpecialType != SpecialType.System_Collections_IEnumerable)
+                    if (interfaceType.IsPubliclyVisible()
+                        && interfaceType.SpecialType != SpecialType.System_Collections_IEnumerable)
+                    {
                         yield return interfaceType;
+                    }
                 }
             }
             else
             {
                 foreach (INamedTypeSymbol interfaceType in allInterfaces)
-                    yield return interfaceType;
+                {
+                    if (interfaceType.IsPubliclyVisible())
+                        yield return interfaceType;
+                }
             }
         }
     }