If you are applying to any Medical, Dental, or Veterinary school, you are essentially required to interview with the committee and submit a committee letter of recommendation. While some professional schools may review your application without a committee letter, many will not. Moreover, schools that accept your application will question why you avoided the committee review process and will be more critical of your application during their evaluation process.
If you are applying to other health professional schools (e.g. optometry, physical therapy, nursing, etc.), in most cases, you will not need to seek a committee letter; however, you should always verify this with the University to which you plan to apply.