If these are automated messages than I think the TCPA would apply regardless of whether they involve marketing.
(a) No person or entity may:
(1) Except as provided in paragraph (a)(2) of this section, initiate any telephone call (other than a call made for emergency purposes or is made with the prior express consent of the called party) using an automatic telephone dialing system or an artificial or prerecorded voice;
(i) To any emergency telephone line, including any 911 line and any emergency line of a hospital, medical physician or service office, health care facility, poison control center, or fire protection or law enforcement agency;
(ii) To the telephone line of any guest room or patient room of a hospital, health care facility, elderly home, or similar establishment; or
(iii) To any telephone number assigned to a paging service, cellular telephone service, specialized mobile radio service, or other radio common carrier service, or any service for which the called party is charged for the call.
(iv) A person will not be liable for violating the prohibition in paragraph (a)(1)(iii) of this section when the call is placed to a wireless number that has been ported from wireline service and such call is a voice call; not knowingly made to a wireless number; and made within 15 days of the porting of the number from wireline to wireless service, provided the number is not already on the national do-not-call registry or caller's company-specific do-not-call list. A person will not be liable for violating the prohibition in paragraph (a)(1)(iii) of this section when making calls exempted by paragraph (a)(9) of this section.
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Opinions expressed are my own and do not reflect legal advice or the opinions of my employer.