Say the employer pays directly for an employee's individual health care policy. By Rev. Rul. 61-146, that employer direct payment is not included in the employee's compensation (under IRC Section 106(a) and Treas. Reg. Section 1.106-1). That same rule would apply if the health care policy premiums paid directly by the employer for the employee's coverage also included coverage, in the same policy, for the employee's spouse and/or dependents.
However, let's say that the employer not only pays premiums for the employee's individual health care policy, but also pays premiums for an individual policy for the employee's spouse (a separate policy from the one covering the employee). Is the employer-paid premium for the spouse's individual health care policy included or not included in the employee's gross income? (Seems to me it ought to be included.)