diff --git a/roles/nvidia_dcgm/defaults/main.yml b/roles/nvidia_dcgm/defaults/main.yml
index 087cf9c0c..7b7e24b98 100644
--- a/roles/nvidia_dcgm/defaults/main.yml
+++ b/roles/nvidia_dcgm/defaults/main.yml
@@ -1,6 +1,15 @@
 ---
 dcgm_pkg_name: "datacenter-gpu-manager"
 
+# DGX OS ships its own DCGM and the package name differs per release.
+# install-dgx.yml converges on this package and removes the other series.
+dcgm_dgx_pkg_map:
+  "18.04": "datacenter-gpu-manager"           # DGX OS 4
+  "20.04": "datacenter-gpu-manager"           # DGX OS 5
+  "22.04": "datacenter-gpu-manager"           # DGX OS 6
+  "24.04": "datacenter-gpu-manager-4-cuda13"  # DGX OS 7
+dcgm_dgx_pkg_name: "{{ dcgm_dgx_pkg_map[ansible_distribution_version] | default('') }}"
+
 # RedHat family
 epel_package: "https://dl.fedoraproject.org/pub/epel/epel-release-latest-{{ ansible_distribution_major_version }}.noarch.rpm"
 epel_key_url: "https://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-{{ ansible_distribution_major_version }}"
diff --git a/roles/nvidia_dcgm/tasks/install-dgx.yml b/roles/nvidia_dcgm/tasks/install-dgx.yml
index 0d512b3e7..74d09a794 100644
--- a/roles/nvidia_dcgm/tasks/install-dgx.yml
+++ b/roles/nvidia_dcgm/tasks/install-dgx.yml
@@ -1,5 +1,37 @@
 ---
-- name: install DCGM from repos
+# DGX OS ships its own DCGM (4.x on DGX OS 7). Never replace it with the
+# unversioned 3.x metapackage from the CUDA repo; converge on the package
+# DGX OS expects and remove packages from the other series first.
+- name: gather package facts
+  package_facts:
+    manager: auto
+
+- name: fail when this DGX OS release has no known DCGM package
+  fail:
+    msg: >-
+      No DCGM package is mapped for {{ ansible_distribution }}
+      {{ ansible_distribution_version }} on DGX; set dcgm_dgx_pkg_name to
+      the package shipped by this DGX OS release.
+  when: dcgm_dgx_pkg_name | length == 0
+
+- name: collect installed DCGM packages from the other series
+  set_fact:
+    dcgm_dgx_conflicting_pkgs: >-
+      {{ (_dcgm_installed | reject('match', _dcgm_v4_re) | list)
+         if (dcgm_dgx_pkg_name is match(_dcgm_v4_re))
+         else (_dcgm_installed | select('match', _dcgm_v4_re) | list) }}
+  vars:
+    _dcgm_installed: "{{ ansible_facts.packages | select('match', '^datacenter-gpu-manager') | list }}"
+    _dcgm_v4_re: '^datacenter-gpu-manager-4(-|$)'
+
+- name: remove DCGM packages from the other series
   package:
-    name: "datacenter-gpu-manager"
+    name: "{{ dcgm_dgx_conflicting_pkgs }}"
+    state: absent
+  when: dcgm_dgx_conflicting_pkgs | length > 0
+
+- name: install the DCGM package shipped by DGX OS
+  package:
+    name: "{{ dcgm_dgx_pkg_name }}"
     state: present
+  when: dcgm_dgx_pkg_name not in ansible_facts.packages