Mont. Code Ann. § 71-3-1117

If any insurer or person, after receiving notice of a lien, makes payment on account of injury, disease, counseling service, or death and the amount of the lien claimed by any physician, nurse, physical therapist, occupational therapist, acupuncturist, chiropractor, dentist, optometrist, naturopathic physician, podiatrist, ambulance service, rehabilitation facility, long-term care facility, psychologist, licensed social worker, licensed professional counselor, hospital, or outpatient center for surgical services has not been paid, the insurer or person is liable to the physician, nurse, physical therapist, occupational therapist, acupuncturist, chiropractor, dentist, optometrist, naturopathic physician, podiatrist, ambulance service, rehabilitation facility, long-term care facility, psychologist, licensed social worker, licensed professional counselor, hospital, or outpatient center for surgical services for the reasonable value of the services.