Prescription Terminology Selecting Abbreviations

How does a physician indicate that a generic drug cannot be substituted in a prescription?

a. pm
b. DAW
c. ud
e. stat

This gentleman has worsening bilateral hydronephrosis. he did not have much of a post void residual on his bladder scan. he is taken to the operating room to have a bilateral cystoscopy and retrograde pyelogram. cpt code: icd10-cm code: icd10-cm code: icd10-cm code