Specific code 2015 ICD-9-CM Diagnosis Code 621.33
Endometrial hyperplasia with atypia
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015
  • Female Only Dx

  • ICD-9-CM 621.33 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 621.33 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 621.33 converts approximately to:
  • 2015/16 ICD-10-CM N85.02 Endometrial intraepithelial neoplasia [EIN]
Approximate Synonyms
  • Atypical endometrial hyperplasia
  • Endometrial hyperplasia W atypia
Clinical Information
  • A benign form of endometrial hyperplasia with increased number of cells with atypia. The atypical cells are large and irregular and have an increased nuclear/cytoplasmic ratio. The risk of progression to endometrial carcinoma rises with the increasing degree of cell atypia
  • An endometrial hyperplasia characterized by cytologic and architectural changes which may lead to endometrial carcinoma. Despite the atypical features and possible course, there is debate on whether to consider this a neoplasm. The relationship with endometrial intraepithelial neoplasia is also unclear
621.33 Excludes
  • endometrial intraepithelial neoplasia [EIN] (621.35)
ICD-9-CM Coding Information
  • 621.33 is only applicable to female patients.
ICD-9-CM Volume 2 Index entries containing back-references to 621.33:
  • Hyperplasia, hyperplastic
    • endometrium, endometrial (adenomatous) (atypical) (cystic) (glandular) (polypoid) (uterus) 621.30
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 621.33 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.