---
id: "de_ik"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["medical", "companies"]
country: ["DE"]
langs: ["common"]
quality: 90
url: "http://registry.apicrafter.io/datatype/de_ik"
---

# German institution code (Institutionskennzeichen, IK) (`de_ik`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Institutionskennzeichen (IK), the nine-digit number that identifies health insurers, hospitals, care services, pharmacies and other institutions that bill the German social insurance (§ 293 SGB V). Two digits classify the kind of institution, two give the state, four are a serial number and the last is a check digit: digits 3 to 8 weighted 2 1 2 1 2 1, 9 subtracted from products above 9, and the sum modulo 10. The IK of a health insurer is printed on the health card as its insurer number.

- Personal data (PII): no
- Categories: Medical/pharma identifiers (medical), Companies/business/organizations (companies)
- Countries: Germany (DE)
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^\d{9}$
```

Check digit algorithm: `de_ik`

## Examples

- `260326822` — Worked example of the check digit in German Wikipedia
- `600300081` — Patient transport company (class 60) in Niedersachsen (region 03), serial 0008, from the German Wikipedia example
- `260326823` (invalid example) — Check digit does not match
- `26032682` (invalid example) — Without the check digit

## Mappings

- fhir: `http://fhir.de/sid/arge-ik/iknr`

## Translations

- de: Institutionskennzeichen (IK)
- ru: Код учреждения в системе социального страхования Германии (IK): Девятизначный номер больничных касс, больниц, аптек и других учреждений, которые выставляют счета социальному страхованию; последняя цифра контрольная.

## Sources

- wikipedia: <https://de.wikipedia.org/wiki/Institutionskennzeichen>

## Quality

Score 90/100. Missing: detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/de_ik.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/DE/medical/de_ik.yaml>
