ICD-10-CM > A00-B99 > A30-A49 > A36 > A36.8 A36.8 Other diphtheria Non-Billable/Non-Specific Codes A36.81Diphtheritic cardiomyopathyA36.82Diphtheritic radiculomyelitisA36.83Diphtheritic polyneuritisA36.84Diphtheritic tubulo-interstitial nephropathyA36.85Diphtheritic cystitisA36.86Diphtheritic conjunctivitisA36.89Other diphtheritic complications