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If Denmark is anything like Sweden there's also: - SSN from different ID space gets assigned to immigrants; when they become citizens they are assigned a new p

If Denmark is anything like Sweden there's also: - SSN from different ID space gets assigned to immigrants; when they become citizens they are assigned a new permanent SSN. - SSN:s have a long and a short form; the short form which cuts off century information can be the same for someone who is 5 years old and someone who is 105 years old. - When an unconscious patient comes in to the E.R. you don't know their SSN, so a temporary one is assigned for use in patient records. Such temporary SSN:s are not coordinated nation-wide so multiple patients may have the same SSN. In some hospitals they don't even have a local standard for ID:s. The staff just makes something up on the spot. It happens that the SSN they made up collides with a valid SSN for another person.

kassner 2y ago
Also: the personnummer carries a date that often means birth date, but there are cases where it’s not, but I’ve seen a few system that just assumes it’s the same. > SSN from different ID space gets assigned to immigrants; when they become citizens they are assigned a new permanent SSN Having gone through that, my personummer didn’t change. Maybe that doesn’t happen anymore?
- tapland 2y ago
  It does, but if you already have a Personnummer or get a residence permit right away so that you are eligible for one you don't get the temporary Samordningsnummer.
  - kalleboo 2y ago
    And the samordningsnummer isn't only for immigrants - it's also for Swedes born abroad who have never been folkbokförd.
    - tapland 2y ago
      They're still still an immigrant. The numbers are for residents (at some point in time) and citizenship isn't reflected by it.
      - kalleboo 2y ago
        Interesting, I've never heard of anyone referring to a citizen as an immigrant, but looking up the legal definition, they certainly are. TIL.
mrweasel 2y ago
Immigrants and refugees will get a "replacement CPR number", which is outside the normal space/range of CPR numbers. Once registered as living in Denmark, they'll get a real CPR number. Danish SSNs doesn't have a long or short form, you used the seventh digit to do a table lookup to see if the person is born in 18XY, 19XY or 20XY. The date of birth is always ddmmyy, there is no long form. So if the seventh digit is 9, and the 5-6 digit is between 00 and 36, then you're born in between 2000 and 2036, if the 5-6 digits are 37 to 99, then your born in the 1900. But you need the published table to figure that out. Last point, there is backup system for unconscious patients, but it should be the same across all medical records as these are somewhat standardized.
delusional 2y ago
> - SSN:s have a long and a short form; the short form which cuts off century information can be the same for someone who is 5 years old and someone who is 105 years old. We don't do that. instead, we shove that extra bit of information into the digit following the last two digits through a table: https://da.wikipedia.org/wiki/CPR-nummer#Under_eller_over_100_%C3%A5r https://da.wikipedia.org/wiki/CPR-nummer#Under_eller_over_10...

kassner 2y ago

Also: the personnummer carries a date that often means birth date, but there are cases where it’s not, but I’ve seen a few system that just assumes it’s the same. > SSN from different ID space gets assigned to immigrants; when they become citizens they are assigned a new permanent SSN Having gone through that, my personummer didn’t change. Maybe that doesn’t happen anymore?

tapland 2y ago
It does, but if you already have a Personnummer or get a residence permit right away so that you are eligible for one you don't get the temporary Samordningsnummer.
- kalleboo 2y ago
  And the samordningsnummer isn't only for immigrants - it's also for Swedes born abroad who have never been folkbokförd.
  - tapland 2y ago
    They're still still an immigrant. The numbers are for residents (at some point in time) and citizenship isn't reflected by it.
    - kalleboo 2y ago
      Interesting, I've never heard of anyone referring to a citizen as an immigrant, but looking up the legal definition, they certainly are. TIL.

mrweasel 2y ago

Immigrants and refugees will get a "replacement CPR number", which is outside the normal space/range of CPR numbers. Once registered as living in Denmark, they'll get a real CPR number. Danish SSNs doesn't have a long or short form, you used the seventh digit to do a table lookup to see if the person is born in 18XY, 19XY or 20XY. The date of birth is always ddmmyy, there is no long form. So if the seventh digit is 9, and the 5-6 digit is between 00 and 36, then you're born in between 2000 and 2036, if the 5-6 digits are 37 to 99, then your born in the 1900. But you need the published table to figure that out. Last point, there is backup system for unconscious patients, but it should be the same across all medical records as these are somewhat standardized.

delusional 2y ago

> - SSN:s have a long and a short form; the short form which cuts off century information can be the same for someone who is 5 years old and someone who is 105 years old. We don't do that. instead, we shove that extra bit of information into the digit following the last two digits through a table: https://da.wikipedia.org/wiki/CPR-nummer#Under_eller_over_100_%C3%A5r https://da.wikipedia.org/wiki/CPR-nummer#Under_eller_over_10...