for one patient: patient's for more than one patients: patients'
If you are talking about one patient then it is: Patient's allergy. If you are talking about lots of patients, then it is: Patients' allergy.
An apostrophe is not required.
There is no apostrophe in "Sports Field"
health care should be marketed to patients?
Not necessarily: hospice care is palliative care. But palliative care is not necessarily hospice care. Palliative care can be applied to patients with chronic, incurable conditions, such as cerebral palsy.
Mrs Debase. (no apostrophe) Mrs Debase's handbag. (Possessive apostrophe)
Patients have every right to their health care record.
Doesn't
Lost wages doesn't need an apostrophe.
respectful care
respectful care