The Care Quality Commission (CQC) has launched a review of health care provision for care home residents.
The evaluation marks the first in a series of special reviews to tackle problems in the sector.
The CQC will assess whether care home residents have access to NHS services, whether they can exercise choice when using them and whether the health care provisions in the homes are good enough.
The provision of health services to care home residents has been of concern for some time. Residents often find their access to services or choice restricted. For example, care homes and GPs have expressed disquiet over the lack clarity regarding charges for GP services which campaigners say penalise residents with costs they would not pay in the community.
The CQC will ask councils and primary care trusts for data on complaints and the number of places funded.
The top 10% of areas that the CQC identifies as being at high risk of poor quality will then be subject to a more in-depth review involving inspection of care homes.
A national report is due in December.