diff --git a/modules/appnexusBidAdapter.js b/modules/appnexusBidAdapter.js
index 7589681f2fd9..62b62d20216c 100644
--- a/modules/appnexusBidAdapter.js
+++ b/modules/appnexusBidAdapter.js
@@ -15,7 +15,8 @@ import {
   logError,
   logInfo,
   logMessage,
-  logWarn
+  logWarn,
+  mergeDeep
 } from '../src/utils.js';
 import {Renderer} from '../src/Renderer.js';
 import {config} from '../src/config.js';
@@ -103,6 +104,28 @@ const VIEWABILITY_URL_START = /\/\/cdn\.adnxs\.com\/v|\/\/cdn\.adnxs\-simple\.co
 const VIEWABILITY_FILE_NAME = 'trk.js';
 const GVLID = 32;
 const storage = getStorageManager({bidderCode: BIDDER_CODE});
+// ORTB2 device types according to the OpenRTB specification
+const ORTB2_DEVICE_TYPE = {
+  MOBILE_TABLET: 1,
+  PERSONAL_COMPUTER: 2,
+  CONNECTED_TV: 3,
+  PHONE: 4,
+  TABLET: 5,
+  CONNECTED_DEVICE: 6,
+  SET_TOP_BOX: 7,
+  OOH_DEVICE: 8
+};
+// Map of ORTB2 device types to AppNexus device types
+const ORTB2_DEVICE_TYPE_MAP = new Map([
+  [ORTB2_DEVICE_TYPE.MOBILE_TABLET, 'Mobile/Tablet - General'],
+  [ORTB2_DEVICE_TYPE.PERSONAL_COMPUTER, 'Personal Computer'],
+  [ORTB2_DEVICE_TYPE.CONNECTED_TV, 'Connected TV'],
+  [ORTB2_DEVICE_TYPE.PHONE, 'Phone'],
+  [ORTB2_DEVICE_TYPE.TABLET, 'Tablet'],
+  [ORTB2_DEVICE_TYPE.CONNECTED_DEVICE, 'Connected Device'],
+  [ORTB2_DEVICE_TYPE.SET_TOP_BOX, 'Set Top Box'],
+  [ORTB2_DEVICE_TYPE.OOH_DEVICE, 'OOH Device'],
+]);
 
 export const spec = {
   code: BIDDER_CODE,
@@ -247,6 +270,12 @@ export const spec = {
       payload.app = appIdObj;
     }
 
+    // if present, convert and merge device object from ortb2 into `payload.device`
+    if (bidderRequest?.ortb2?.device) {
+      payload.device = payload.device || {};
+      mergeDeep(payload.device, convertORTB2DeviceDataToAppNexusDeviceObject(bidderRequest.ortb2.device));
+    }
+
     // grab the ortb2 keyword data (if it exists) and convert from the comma list string format to object format
     let ortb2 = deepClone(bidderRequest && bidderRequest.ortb2);
 
@@ -1196,4 +1225,29 @@ function getBidFloor(bid) {
   return null;
 }
 
+// Convert device data to a format that AppNexus expects
+function convertORTB2DeviceDataToAppNexusDeviceObject(ortb2DeviceData) {
+  const _device = {
+    useragent: ortb2DeviceData.ua,
+    devicetype: ORTB2_DEVICE_TYPE_MAP.get(ortb2DeviceData.devicetype),
+    make: ortb2DeviceData.make,
+    model: ortb2DeviceData.model,
+    os: ortb2DeviceData.os,
+    os_version: ortb2DeviceData.osv,
+    w: ortb2DeviceData.w,
+    h: ortb2DeviceData.h,
+    ppi: ortb2DeviceData.ppi,
+    pxratio: ortb2DeviceData.pxratio,
+  };
+
+  // filter out any empty values and return the object
+  return Object.keys(_device)
+    .reduce((r, key) => {
+      if (_device[key]) {
+        r[key] = _device[key];
+      }
+      return r;
+    }, {});
+}
+
 registerBidder(spec);
diff --git a/test/spec/modules/appnexusBidAdapter_spec.js b/test/spec/modules/appnexusBidAdapter_spec.js
index c8be99f71613..511a9a42a26d 100644
--- a/test/spec/modules/appnexusBidAdapter_spec.js
+++ b/test/spec/modules/appnexusBidAdapter_spec.js
@@ -431,6 +431,42 @@ describe('AppNexusAdapter', function () {
         expect(payload.tags[0].video_frameworks).to.deep.equal([1, 4])
       });
 
+      it('should convert and include ORTB2 device data when available', function () {
+        const bidRequest = deepClone(bidRequests[0]);
+        const bidderRequest = {
+          ortb2: {
+            device: {
+              w: 980,
+              h: 1720,
+              dnt: 0,
+              ua: 'Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/125.0.6422.80 Mobile/15E148 Safari/604.1',
+              language: 'en',
+              devicetype: 1,
+              make: 'Apple',
+              model: 'iPhone 12 Pro Max',
+              os: 'iOS',
+              osv: '17.4',
+            },
+          },
+        };
+
+        const expectedDeviceResult = {
+          useragent: bidderRequest.ortb2.device.ua,
+          devicetype: 'Mobile/Tablet - General',
+          make: bidderRequest.ortb2.device.make,
+          model: bidderRequest.ortb2.device.model,
+          os: bidderRequest.ortb2.device.os,
+          os_version: bidderRequest.ortb2.device.osv,
+          w: bidderRequest.ortb2.device.w,
+          h: bidderRequest.ortb2.device.h,
+        };
+
+        const request = spec.buildRequests([bidRequest], bidderRequest);
+        const payload = JSON.parse(request.data);
+
+        expect(payload.device).to.deep.equal(expectedDeviceResult);
+      });
+
       it('should add video property when adUnit includes a renderer', function () {
         const videoData = {
           mediaTypes: {