Convert to ICD-10-CM: 
621.35 converts approximately to:
- 2015/16 ICD-10-CM N85.02 Endometrial intraepithelial neoplasia [EIN]
 ICD-9-CM Volume 2 Index entries containing back-references to 
621.35:
- EIN (endometrial intraepithelial neoplasia) 621.35
- Neoplasia endometrial intraepithelial [EIN] 621.35 endometrial intraepithelial [EIN] 621.35