diff --git a/.github/workflows/github-zen-packages-release.yml b/.github/workflows/github-zen-packages-release.yml
index b8281f6..f1161cb 100644
--- a/.github/workflows/github-zen-packages-release.yml
+++ b/.github/workflows/github-zen-packages-release.yml
@@ -67,6 +67,16 @@ jobs:
       - name: cleanup r4.terminology from r4b to avoid clashes
         run: rm -rf zen-packages/hl7-terminology-r4
 
+      - run: bb zen-profiles-packages "release.txt" "us-core-610/" "zen-packages/"
+        name: Generate & release us-core610
+        env:
+          ZEN_FHIR_RELEASE_GITHUB_USER: ${{ secrets.ZEN_FHIR_RELEASE_GITHUB_USER }}
+          ZEN_FHIR_RELEASE_GITHUB_TOKEN: ${{ secrets.ZEN_FHIR_RELEASE_GITHUB_TOKEN }}
+          ZEN_FHIR_RELEASE_GITHUB_ORG: ${{ secrets.ZEN_FHIR_RELEASE_GITHUB_ORG }}
+
+      - name: cleanup after us-core601 build
+        run: rm -rf zen-packages/hl7.fhir.r4.core zen-packages/hl7.fhir.uv.bulkdata zen-packages/us.nlm.vsac zen-packages/hl7.fhir.uv.sdc
+
       - run: bb zen-profiles-packages "release.txt" "node_modules/" "zen-packages/"
         name: Generate & release npm Zen packages
         env:
diff --git a/bb.edn b/bb.edn
index be001e2..fafd197 100644
--- a/bb.edn
+++ b/bb.edn
@@ -111,7 +111,7 @@
          kbv-basis-patch
          {:task (shell "cp resources/KBV_PR_Base_Patient.json node_modules/kbv.basis/KBV_PR_Base_Patient.json")}
 
-         init {:depends [set-zen-fhir-version set-zen-fhir-lib-version install-npm kbv-basis-patch pull-nz-igs pull-r4b pull-r5 pull-au-igs pull-chile-igs]}
+         init {:depends [set-zen-fhir-version set-zen-fhir-lib-version install-npm kbv-basis-patch pull-nz-igs pull-r4b pull-r5 pull-au-igs pull-chile-igs build-us-core-601]}
 
          repl {:depends [set-zen-fhir-version set-zen-fhir-lib-version]
                :task (clojure "-M:test:nrepl -m nrepl.cmdline --middleware [cider.nrepl/cider-middleware]")}
@@ -138,6 +138,20 @@
                                                                   true)]
                                 (run 'build-stanadlone-projects))
 
+         build-us-core-601 {:task (do
+                                    (shell {:dir "us-core-610"} "npm --registry=https://packages.simplifier.net install")
+                                    (shell {:dir "us-core-610"} "npm --registry=https://packages.simplifier.net install")
+                                    (let [root-manifest-file (io/file "us-core-610/package.json")
+                                          root-manifest-deps (:dependencies (json/parse-string (slurp root-manifest-file) keyword))
+                                          us-core-manifest-file (io/file "us-core-610/node_modules/hl7.fhir.us.core/package.json")
+                                          updated-manifest (assoc (json/parse-string (slurp us-core-manifest-file) keyword)
+                                                                  :name "hl7.fhir.us.core610"
+                                                                  :dependencies (dissoc root-manifest-deps :hl7.fhir.us.core))
+                                          _ (spit us-core-manifest-file (json/generate-string updated-manifest))
+                                          _  (.renameTo
+                                               ^File (io/file "us-core-610/node_modules/hl7.fhir.us.core")
+                                               (io/file "us-core-610/node_modules/hl7.fhir.us.core610"))]))}
+
          build (clojure "-X:build all")
 
          zen-profiles (let [[node-modules zrc ver package] *command-line-args*]
diff --git a/us-core-610/package.json b/us-core-610/package.json
new file mode 100644
index 0000000..44af3c1
--- /dev/null
+++ b/us-core-610/package.json
@@ -0,0 +1,12 @@
+{
+    "dependencies" : {
+        "hl7.fhir.us.core" : "6.1.0",
+        "hl7.fhir.r4.core" : "4.0.1",
+        "hl7.fhir.uv.bulkdata" : "2.0.0",
+        "hl7.fhir.uv.smart-app-launch" : "2.1.0",
+        "us.nlm.vsac" : "0.7.0",
+        "hl7.fhir.uv.sdc" : "3.0.0",
+        "us.cdc.phinvads" : "0.12.0",
+        "ihe.formatcode.fhir" : "1.1.0"
+    }
+}