"Basic medical-surgical expense coverage" is a policy of disability insurance which provides coverage for each person insured under the policy for the expenses incurred for the necessary services rendered by a physician for treatment of an injury or sickness for at least the following:

(1) Surgical services:

(a) In amounts not less than those provided on a fee schedule based on the relative values contained in the state of New York certified surgical fee schedule, or the 1974 California relative value schedule or other acceptable relative value scale of surgical procedures, up to a maximum of at least $500 for any one procedure; or

(b) Not less than 80% of the reasonable charges.

(2) Anesthesia services, consisting of administration of necessary general anesthesia and related procedures in connection with covered surgical service rendered by a person licensed to perform such service other than the physician (or his assistant) performing the surgical services:

(a) In an amount not less than 80% of the reasonable charges; or

(b) 15% of the surgical service benefit.

(3) In-hospital medical services, consisting of physician services rendered to a person who is a bed patient in a hospital for treatment of sickness or injury other than that for which surgical care is required, in an amount not less than 80% of the reasonable charges; or $5 per day for not less than 21 days during one period of confinement.