diff --git a/x-pack/legacy/plugins/siem/public/containers/case/types.ts b/x-pack/legacy/plugins/siem/public/containers/case/types.ts
index e98ff9677815b..0f80b2327a30c 100644
--- a/x-pack/legacy/plugins/siem/public/containers/case/types.ts
+++ b/x-pack/legacy/plugins/siem/public/containers/case/types.ts
@@ -13,12 +13,10 @@ export interface NewCase extends FormData {
   description: string;
   tags: string[];
   title: string;
-  case_type: string;
 }
 
 export interface Case {
   case_id: string;
-  case_type: string;
   created_at: string;
   created_by: ElasticUser;
   description: string;
diff --git a/x-pack/legacy/plugins/siem/public/containers/case/use_get_case.tsx b/x-pack/legacy/plugins/siem/public/containers/case/use_get_case.tsx
index 0de8a5fe80fdd..8cc961c68fdf0 100644
--- a/x-pack/legacy/plugins/siem/public/containers/case/use_get_case.tsx
+++ b/x-pack/legacy/plugins/siem/public/containers/case/use_get_case.tsx
@@ -51,7 +51,6 @@ const dataFetchReducer = (state: CaseState, action: Action): CaseState => {
 };
 const initialData: Case = {
   case_id: '',
-  case_type: '',
   created_at: '',
   created_by: {
     username: '',
diff --git a/x-pack/legacy/plugins/siem/public/containers/case/use_post_case.tsx b/x-pack/legacy/plugins/siem/public/containers/case/use_post_case.tsx
index 1078c9645ec62..5cf99701977d2 100644
--- a/x-pack/legacy/plugins/siem/public/containers/case/use_post_case.tsx
+++ b/x-pack/legacy/plugins/siem/public/containers/case/use_post_case.tsx
@@ -57,7 +57,6 @@ const dataFetchReducer = (state: NewCaseState, action: Action): NewCaseState =>
   }
 };
 const initialData: NewCase = {
-  case_type: 'security',
   description: '',
   isNew: false,
   tags: [],
diff --git a/x-pack/legacy/plugins/siem/public/pages/case/components/create/form_options.ts b/x-pack/legacy/plugins/siem/public/pages/case/components/create/form_options.ts
index 44c009b566795..7bc43e23a72c5 100644
--- a/x-pack/legacy/plugins/siem/public/pages/case/components/create/form_options.ts
+++ b/x-pack/legacy/plugins/siem/public/pages/case/components/create/form_options.ts
@@ -4,17 +4,6 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-export const caseTypeOptions = [
-  {
-    value: 'security',
-    inputDisplay: 'Security',
-  },
-  {
-    value: 'other',
-    inputDisplay: 'Other',
-  },
-];
-
 export const stateOptions = [
   {
     value: 'open',
diff --git a/x-pack/legacy/plugins/siem/public/pages/case/components/create/index.tsx b/x-pack/legacy/plugins/siem/public/pages/case/components/create/index.tsx
index 2d453686f873d..9fd1525003b0b 100644
--- a/x-pack/legacy/plugins/siem/public/pages/case/components/create/index.tsx
+++ b/x-pack/legacy/plugins/siem/public/pages/case/components/create/index.tsx
@@ -21,7 +21,6 @@ import { schema } from './schema';
 import * as i18n from '../../translations';
 import { SiemPageName } from '../../../home/types';
 import { DescriptionMarkdown } from '../description_md_editor';
-import { caseTypeOptions } from './form_options';
 
 export const CommonUseField = getUseField({ component: Field });
 
@@ -74,18 +73,6 @@ export const Create = React.memo(() => {
           isLoading={isLoading}
           onChange={description => setFormData({ ...data, description })}
         />
-        <CommonUseField
-          path="case_type"
-          componentProps={{
-            idAria: 'caseType',
-            'data-test-subj': 'caseType',
-            euiFieldProps: {
-              fullWidth: false,
-              options: caseTypeOptions,
-            },
-            isDisabled: isLoading,
-          }}
-        />
         <TagContainer>
           <CommonUseField
             path="tags"
diff --git a/x-pack/legacy/plugins/siem/public/pages/case/components/create/schema.tsx b/x-pack/legacy/plugins/siem/public/pages/case/components/create/schema.tsx
index 8a93848c62e56..1b5df72a6671c 100644
--- a/x-pack/legacy/plugins/siem/public/pages/case/components/create/schema.tsx
+++ b/x-pack/legacy/plugins/siem/public/pages/case/components/create/schema.tsx
@@ -28,15 +28,6 @@ export const schema: FormSchema = {
       },
     ],
   },
-  case_type: {
-    type: FIELD_TYPES.SUPER_SELECT,
-    label: i18n.CASE_TYPE,
-    validations: [
-      {
-        validator: emptyField(i18n.CASE_TYPE_REQUIRED),
-      },
-    ],
-  },
   tags: {
     type: FIELD_TYPES.COMBO_BOX,
     label: i18n.TAGS,
diff --git a/x-pack/legacy/plugins/siem/public/pages/case/translations.ts b/x-pack/legacy/plugins/siem/public/pages/case/translations.ts
index 87e4956f93017..4e878ba58411e 100644
--- a/x-pack/legacy/plugins/siem/public/pages/case/translations.ts
+++ b/x-pack/legacy/plugins/siem/public/pages/case/translations.ts
@@ -18,17 +18,6 @@ export const CASE_TITLE = i18n.translate('xpack.siem.case.caseView.caseTitle', {
   defaultMessage: 'Case Title',
 });
 
-export const CASE_TYPE = i18n.translate('xpack.siem.case.caseView.caseType', {
-  defaultMessage: 'Case type',
-});
-
-export const CASE_TYPE_REQUIRED = i18n.translate(
-  'xpack.siem.case.createCase.caseTypeFieldRequiredError',
-  {
-    defaultMessage: 'A case type is required.',
-  }
-);
-
 export const CREATED_AT = i18n.translate('xpack.siem.case.caseView.createdAt', {
   defaultMessage: 'Created at',
 });
diff --git a/x-pack/legacy/plugins/siem/server/lib/case/saved_object_mappings.ts b/x-pack/legacy/plugins/siem/server/lib/case/saved_object_mappings.ts
index e1056f0ec70ec..80cdb9e979a68 100644
--- a/x-pack/legacy/plugins/siem/server/lib/case/saved_object_mappings.ts
+++ b/x-pack/legacy/plugins/siem/server/lib/case/saved_object_mappings.ts
@@ -45,9 +45,6 @@ export const caseSavedObjectMappings: {
       tags: {
         type: 'keyword',
       },
-      case_type: {
-        type: 'keyword',
-      },
       updated_at: {
         type: 'date',
       },
diff --git a/x-pack/plugins/case/server/routes/api/__fixtures__/mock_saved_objects.ts b/x-pack/plugins/case/server/routes/api/__fixtures__/mock_saved_objects.ts
index 1bcbfb5cd765c..c7f6b6fad7d1a 100644
--- a/x-pack/plugins/case/server/routes/api/__fixtures__/mock_saved_objects.ts
+++ b/x-pack/plugins/case/server/routes/api/__fixtures__/mock_saved_objects.ts
@@ -18,7 +18,6 @@ export const mockCases = [
       title: 'Super Bad Security Issue',
       state: 'open',
       tags: ['defacement'],
-      case_type: 'security',
       updated_at: '2019-11-25T21:54:48.952Z',
     },
     references: [],
@@ -38,7 +37,6 @@ export const mockCases = [
       title: 'Damaging Data Destruction Detected',
       state: 'open',
       tags: ['Data Destruction'],
-      case_type: 'security',
       updated_at: '2019-11-25T22:32:00.900Z',
     },
     references: [],
@@ -58,7 +56,6 @@ export const mockCases = [
       title: 'Another bad one',
       state: 'open',
       tags: ['LOLBins'],
-      case_type: 'security',
       updated_at: '2019-11-25T22:32:17.947Z',
     },
     references: [],
diff --git a/x-pack/plugins/case/server/routes/api/__tests__/post_case.test.ts b/x-pack/plugins/case/server/routes/api/__tests__/post_case.test.ts
index 14a56e2fcbfc9..32c7c5a015af0 100644
--- a/x-pack/plugins/case/server/routes/api/__tests__/post_case.test.ts
+++ b/x-pack/plugins/case/server/routes/api/__tests__/post_case.test.ts
@@ -28,7 +28,6 @@ describe('POST cases', () => {
         title: 'Super Bad Security Issue',
         state: 'open',
         tags: ['defacement'],
-        case_type: 'security',
       },
     });
 
@@ -48,7 +47,6 @@ describe('POST cases', () => {
         title: 'Super Bad Security Issue',
         state: 'open',
         tags: ['error'],
-        case_type: 'security',
       },
     });
 
@@ -69,7 +67,6 @@ describe('POST cases', () => {
         title: 'Super Bad Security Issue',
         state: 'open',
         tags: ['defacement'],
-        case_type: 'security',
       },
     });
 
diff --git a/x-pack/plugins/case/server/routes/api/schema.ts b/x-pack/plugins/case/server/routes/api/schema.ts
index 0f09283f21ecb..962dc474254f0 100644
--- a/x-pack/plugins/case/server/routes/api/schema.ts
+++ b/x-pack/plugins/case/server/routes/api/schema.ts
@@ -28,7 +28,6 @@ export const UpdatedCommentSchema = schema.object({
 });
 
 export const NewCaseSchema = schema.object({
-  case_type: schema.string(),
   description: schema.string(),
   state: schema.oneOf([schema.literal('open'), schema.literal('closed')], { defaultValue: 'open' }),
   tags: schema.arrayOf(schema.string(), { defaultValue: [] }),
@@ -36,7 +35,6 @@ export const NewCaseSchema = schema.object({
 });
 
 export const UpdatedCaseSchema = schema.object({
-  case_type: schema.maybe(schema.string()),
   description: schema.maybe(schema.string()),
   state: schema.maybe(schema.oneOf([schema.literal('open'), schema.literal('closed')])),
   tags: schema.maybe(schema.arrayOf(schema.string())),
diff --git a/x-pack/plugins/case/server/routes/api/types.ts b/x-pack/plugins/case/server/routes/api/types.ts
index a5c565029b29a..2d1a88bcf1429 100644
--- a/x-pack/plugins/case/server/routes/api/types.ts
+++ b/x-pack/plugins/case/server/routes/api/types.ts
@@ -63,7 +63,6 @@ export interface AllComments {
 }
 
 export interface UpdatedCaseType {
-  case_type?: UpdatedCaseTyped['case_type'];
   description?: UpdatedCaseTyped['description'];
   state?: UpdatedCaseTyped['state'];
   tags?: UpdatedCaseTyped['tags'];