diff --git a/src/bioregistry/data/bioregistry.json b/src/bioregistry/data/bioregistry.json
index fec7b1590..95f79a963 100644
--- a/src/bioregistry/data/bioregistry.json
+++ b/src/bioregistry/data/bioregistry.json
@@ -67165,6 +67165,22 @@
       "NIST Chemistry WebBook"
     ]
   },
+  "nist.codata": {
+    "mappings": {
+      "wikidata": "P1645"
+    },
+    "wikidata": {
+      "database": "Q735279",
+      "description": "identifier for a physical constant",
+      "example": [
+        "c"
+      ],
+      "homepage": "http://physics.nist.gov/cuu/Constants/index.html",
+      "name": "NIST/CODATA ID",
+      "prefix": "P1645",
+      "uri_format": "http://physics.nist.gov/cgi-bin/cuu/Value?$1"
+    }
+  },
   "nkos": {
     "contributor": {
       "email": "cthoyt@gmail.com",
diff --git a/src/bioregistry/data/external/wikidata/processed.json b/src/bioregistry/data/external/wikidata/processed.json
index 545b2420a..5045f26f8 100644
--- a/src/bioregistry/data/external/wikidata/processed.json
+++ b/src/bioregistry/data/external/wikidata/processed.json
@@ -1959,6 +1959,17 @@
     "prefix": "P1610",
     "uri_format": "https://dialnet.unirioja.es/servlet/articulo?codigo=$1"
   },
+  "P1645": {
+    "database": "Q735279",
+    "description": "identifier for a physical constant",
+    "example": [
+      "c"
+    ],
+    "homepage": "http://physics.nist.gov/cuu/Constants/index.html",
+    "name": "NIST/CODATA ID",
+    "prefix": "P1645",
+    "uri_format": "http://physics.nist.gov/cgi-bin/cuu/Value?$1"
+  },
   "P1668": {
     "database": "Q192093",
     "description": "ATCvet code",