Maryland Insurance Section 27-221
§ 27-221.
  (a)   (1)   In this section the following words have the meanings indicated.
    (2)   "Carrier" means a person that is:
      (i)   an insurer that holds a certificate of authority in the State and provides health insurance in the State;
      (ii)   a health maintenance organization that holds a certificate of authority to operate in the State; or
      (iii)   a nonprofit health service plan that holds a certificate of authority to operate in the State.
    (3)   "Health coverage" means any of the following:
      (i)   a health insurance contract that is issued or delivered in the State by an insurer;
      (ii)   a contract that is issued or delivered in the State by a nonprofit health service plan; or
      (iii)   a contract that is issued or delivered in the State by a health maintenance organization.
    (4)   "Health status-related factor" has the meaning stated in § 15-1301 of this article.
    (5)   "Individual contract" means a contract between a carrier and an individual covering:
      (i)   the individual;
      (ii)   the individual and the individual's family members; or
      (iii)   the family members of the individual.
    (6)   (i)   "Reunderwrite" means to reevaluate any health status-related factor, occupation, hobby, or activity of an individual for the purpose of:
        1.   terminating health coverage of the individual; or
        2.   moving the individual from a more favorable rate class to a less favorable rate class.
      (ii)   "Reunderwrite" does not include:
        1.   moving an individual from one rate tier to another rate tier solely due to the addition or deletion of a family member under the health coverage;
        2.   increasing the premium under an attained age rated contract solely due to the increasing age of the individual covered under the health coverage;
        3.   on receipt of an application from an insured to increase the benefits under an existing contract, evaluating the health status-related factors, occupation, hobbies, or activities of the insured for the purpose of increasing the benefits under the contract; or
        4.   during the period in which a carrier has the right to contest a policy, denying a claim, amending the policy, making an adjustment to the premium, or rescinding the policy based on a material misrepresentation or fraud in the application.
  (b)   A carrier may not reunderwrite an individual for health coverage under an individual contract after the individual contract has been issued.