Comprehensive Health Care Reform Act of 2007- Amends the Internal Revenue Code to: (1) revise the tax credit for the health insurance costs of a taxpayer, the taxpayer's spouse, and dependents to increase the amount of, and expand eligibility criteria for, such credit; (2) permit up to $500 of unused health benefits under a health flexible spending arrangement to be carried over to a succeeding plan year or paid directly to an employee as compensation; (3) revise the tax deduction for payments to a health savings account to eliminate the requirement for coverage under a high deductible health plan; and (4) repeal the 7.5% threshold limitation on the tax deduction of medical and dental expenses.