diff --git a/src/ontology/config/hp-snomed.sssom.yml b/src/ontology/config/hp-snomed.sssom.yml
new file mode 100644
index 000000000..3ac434e16
--- /dev/null
+++ b/src/ontology/config/hp-snomed.sssom.yml
@@ -0,0 +1,8 @@
+license: "https://creativecommons.org/publicdomain/zero/1.0/"
+mapping_set_id: http://purl.obolibrary.org/obo/hp/mappings/hp-snomed
+curie_map:
+  rdfs: "http://www.w3.org/2000/01/rdf-schema#"
+  owl: "http://www.w3.org/2002/07/owl#"
+  SNOMED: "http://snomed.info/id/"
+  HP: http://purl.obolibrary.org/obo/HP_
+  orcid: "https://orcid.org/"
diff --git a/src/ontology/config/inverse-map.yml b/src/ontology/config/inverse-map.yml
new file mode 100644
index 000000000..f5e043492
--- /dev/null
+++ b/src/ontology/config/inverse-map.yml
@@ -0,0 +1,14 @@
+inverse_predicate_map:
+  skos:closeMatch: skos:closeMatch
+  skos:relatedMatch: skos:relatedMatch
+  skos:exactMatch: skos:exactMatch
+  skos:narrowMatch: skos:broadMatch
+  skos:broadMatch: skos:narrowMatch
+  semapv:crossSpeciesExactMatch: semapv:crossSpeciesExactMatch
+  semapv:crossSpeciesNarrowMatch: semapv:crossSpeciesBroadMatch
+  semapv:crossSpeciesBroadMatch: semapv:crossSpeciesNarrowMatch
+  semapv:crossSpeciesCloseMatch: semapv:crossSpeciesCloseMatch
+  owl:equivalentClass: owl:equivalentClass
+  owl:sameAs: owl:sameAs
+  rdfs:subClassOf: sssom:superClassOf
+  sssom:superClassOf: rdfs:subClassOf
diff --git a/src/ontology/config/prefixes.csv b/src/ontology/config/prefixes.csv
index 7a2a00208..4ba7c1459 100644
--- a/src/ontology/config/prefixes.csv
+++ b/src/ontology/config/prefixes.csv
@@ -227,4 +227,5 @@ ICD10CM,http://purl.bioontology.org/ontology/ICD10CM/
 ICD10WHO,https://icd.who.int/browse10/2019/en#/
 OMIMPS,https://omim.org/phenotypicSeries/PS
 OMIM,https://omim.org/entry/
-Orphanet,http://www.orpha.net/ORDO/Orphanet_
\ No newline at end of file
+Orphanet,http://www.orpha.net/ORDO/Orphanet_
+SNOMED, http://snomed.info/id/
diff --git a/src/ontology/hp.Makefile b/src/ontology/hp.Makefile
index c15dd9c3e..3c30b6c14 100644
--- a/src/ontology/hp.Makefile
+++ b/src/ontology/hp.Makefile
@@ -577,3 +577,30 @@ $(TMPDIR)/hp-%-merged.owl: hp-base.owl tmp/%.owl
 
 mappings: 
 	$(MAKE_FAST) ../mappings/hp-snomed.lexmatch.sssom.tsv
+
+SNOMED_HPO=https://docs.google.com/spreadsheets/d/e/2PACX-1vTHNmZFJJ0zExDORNE1rekVfeSny1Bv5_q6XXAFeuBkLHbeucokTPvjuTBZlRUbHyuAm26PQlzkMBAH/pub?gid=488628125&single=true&output=tsv
+tmp/hp-snomed-external.sssom.tsv:
+	wget "$(SNOMED_HPO)" -O $@
+
+tmp/hp-snomed.sssom.tsv: tmp/hp-snomed-external.sssom.tsv
+	sssom parse $< -m config/hp-snomed.sssom.yml -o $@
+
+tmp/snomed-hp.sssom.tsv: tmp/hp-snomed.sssom.tsv
+	sssom invert $< --inverse-map config/inverse-map.yml -o $@
+
+tmp/snomed-hp.sssom.ttl: tmp/snomed-hp.sssom.tsv
+	sssom convert $< -O owl -o $@
+
+tmp/snomed.owl: tmp/snomed-hp.sssom.ttl
+	$(ROBOT) merge -i tmp/snomed-0324.owl -i tmp/hp-snomed.sssom.ttl convert -f owl -o $@
+
+tmp/hp-snomed.basic-validation.txt: tmp/snomed.db
+	runoak -i $< validate-mappings -o $@
+
+tmp/hp-snomed.llm-validation.txt: tmp/snomed.db hp.obo
+	runoak -i llm:$< validate-mappings --adapter-mapping hp=hp.obo > $@
+
+validate-mappings:
+	make IMP=false MIR=false PAT=false tmp/hp-snomed.basic-validation.txt
+	make IMP=false MIR=false PAT=false tmp/hp-snomed.llm-validation.txt
+