What are the ICD-10-CM codes?

a. Subsequent follow-up care is provided for the 82-year-old male nursing facility patient with Alzheimer's disease.
b. The resident has responded well to some new medications and appears to have recovered some of his cognitive abilities without behavioral disturbances.
c. The physician performs a problem-focused history and physical examination on his neurological problem and orders the current treatments continued.
d. The MDM complexity is low.