Free physiotherapy (§ 62) means that the Danish National Health Insurance pays for the treatment. Guidelines for free physiotherapy is applicable for persons with long-term severe physical disabilities. There is a list showing which conditions are accepted for free physiotherapy. For further details and diagnoses have a look on
http://www.sst.dk/publ/Publ2008/Plan/Fysio/VejlVederlagsfriFysioterapi_4jul08.pdf
Free physiotherapy requires a special recommandation from a doctor. You need to have a Danish CPR-number and live in Denmark.