diff --git a/src/cron/demarchesSimplifiees.ts b/src/cron/demarchesSimplifiees.ts
index 33fd6a47..f0c4cdf2 100644
--- a/src/cron/demarchesSimplifiees.ts
+++ b/src/cron/demarchesSimplifiees.ts
@@ -1,6 +1,7 @@
 import * as Sentry from "@sentry/nextjs";
 import pLimit from "p-limit";
 
+import { formatAdeliId } from "../services/adeli/formatAdeliId";
 import { requestAdeli } from "../services/adeli/request";
 import { addVerificationMessage } from "../services/demarchesSimplifiees/buildRequest";
 import filterDossiersToVerif from "../services/demarchesSimplifiees/dossiers";
@@ -20,7 +21,6 @@ import {
 } from "../services/psychologists";
 import { AdeliData } from "../types/adeli";
 import { Psychologist } from "../types/psychologist";
-import { removeNonNumericCharacters } from "../utils/string";
 
 const limit = pLimit(5);
 
@@ -74,6 +74,27 @@ export const importFromDS = async (): Promise<void> => {
   await importArchived();
 };
 
+function isAdeliIdValidDepartment(
+  adeliId: string,
+  department: string
+): boolean {
+  const departmentFromAdeli = formatAdeliId(adeliId).substring(0, 2);
+  switch (departmentFromAdeli) {
+    case "9A":
+      return department === "971";
+    case "9B":
+      return department === "972";
+    case "9C":
+      return department === "973";
+    case "9D":
+      return department === "974";
+    case "9F":
+      return department === "976";
+    default:
+      return departmentFromAdeli === department;
+  }
+}
+
 export const validateDossier = async (
   dossier: Psychologist,
   adeliData: AdeliData[]
@@ -84,10 +105,7 @@ export const validateDossier = async (
     return [`Numéro ADELI invalide : ${dossier.adeliId}`];
   }
 
-  const departmentFromAdeli = removeNonNumericCharacters(
-    dossier.adeliId || ""
-  ).substring(0, 2);
-  if (dossier.department !== departmentFromAdeli) {
+  if (!isAdeliIdValidDepartment(dossier.adeliId || "", dossier.department)) {
     errors.push(
       `Le numéro ADELI ${dossier.adeliId} ne correspond pas au département ${dossier.department}`
     );
diff --git a/src/services/__tests__/adeli-resquest.spec.ts b/src/services/__tests__/adeli-resquest.spec.ts
index 5c1dcfbf..c54269cc 100644
--- a/src/services/__tests__/adeli-resquest.spec.ts
+++ b/src/services/__tests__/adeli-resquest.spec.ts
@@ -20,17 +20,23 @@ describe("requestAdeli", () => {
   });
 
   it.each`
-    input
-    ${"123"}
-    ${"1 2    3"}
-    ${"1.2...3"}
-    ${"00/00/01/23"}
-  `("should call api endpoint if adeli is $input", async ({ input }) => {
-    const result = await requestAdeli(input);
-    expect(axios.get).toHaveBeenCalledWith(
-      "https://datasette-ps-libre-acces.dev.fabrique.social.gouv.fr/PS_LibreAcces/PS_LibreAcces_Personne_activite.json",
-      { params: { "Identification nationale PP__exact": "0000000123" } }
-    );
-    expect(result).toEqual([]);
-  });
+    input             | expected
+    ${"123"}          | ${"0000000123"}
+    ${"1 2    3"}     | ${"0000000123"}
+    ${"1.2...3"}      | ${"0000000123"}
+    ${"00/00/01/23"}  | ${"0000000123"}
+    ${"123zzz"}       | ${"0000000123"}
+    ${"9F12345678"}   | ${"9F12345678"}
+    ${"2A 1234 5678"} | ${"2A12345678"}
+  `(
+    "should call api endpoint if adeli is $input",
+    async ({ input, expected }) => {
+      const result = await requestAdeli(input);
+      expect(axios.get).toHaveBeenCalledWith(
+        "https://datasette-ps-libre-acces.dev.fabrique.social.gouv.fr/PS_LibreAcces/PS_LibreAcces_Personne_activite.json",
+        { params: { "Identification nationale PP__exact": expected } }
+      );
+      expect(result).toEqual([]);
+    }
+  );
 });
diff --git a/src/services/adeli/formatAdeliId.ts b/src/services/adeli/formatAdeliId.ts
new file mode 100644
index 00000000..2020fe2c
--- /dev/null
+++ b/src/services/adeli/formatAdeliId.ts
@@ -0,0 +1,10 @@
+export const formatAdeliId = (adeliId: string): string => {
+  // Adeli ID is a 10-digit string, that can also contain letters for some departments.
+  // e.g. "9A1234678" (Guadeloupe) or "2A1234678" (Corse-du-Sud).
+  // In this particular function, we just want to remove non-alphanumeric (0 to 9 and A to F) characters
+  // since it is sent to adeli service for complete checking.
+  return (adeliId || "")
+    .replace(/[^0-9a-f]/gi, "")
+    .toUpperCase()
+    .padStart(10, "0");
+};
diff --git a/src/services/adeli/request.ts b/src/services/adeli/request.ts
index 04b4f568..221ac707 100644
--- a/src/services/adeli/request.ts
+++ b/src/services/adeli/request.ts
@@ -2,11 +2,8 @@ import axios, { AxiosResponse } from "axios";
 
 import { AdeliData, AdeliRawResponse } from "../../types/adeli";
 import { zip } from "../../utils/array";
-import { removeNonNumericCharacters } from "../../utils/string";
 import config from "../config";
-
-const formatRequestedAdeli = (adeliId: string): string =>
-  removeNonNumericCharacters(adeliId || "").padStart(10, "0");
+import { formatAdeliId } from "./formatAdeliId";
 
 const rowColumnsToObject = <Column>(row: string[], columns: Column[]) =>
   Object.fromEntries(zip(columns, row));
@@ -24,7 +21,7 @@ export const requestAdeli = async (
     config.adeli.apiUrl,
     {
       params: {
-        "Identification nationale PP__exact": formatRequestedAdeli(numeroAdeli),
+        "Identification nationale PP__exact": formatAdeliId(numeroAdeli),
       },
     }
   );
diff --git a/src/utils/string.ts b/src/utils/string.ts
index afd63fac..b2451593 100644
--- a/src/utils/string.ts
+++ b/src/utils/string.ts
@@ -19,7 +19,3 @@ export const firstWordAreSimilar = (
 
   return areSimilar(firstWord1, firstWord2);
 };
-
-export function removeNonNumericCharacters(value: string): string {
-  return value.replace(/[^0-9]/g, "");
-}