2024 ICD-10-CM Diagnosis Code C51.9

by

Malignant neoplasm of vulva, unspecified

  • C51.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM C51.9 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of C51.9 – other international versions of ICD-10 C51.9 may differ.

ICD-10-CM Coding Rules

  • C51.9 is applicable to female patients.

Applicable To

  • Malignant neoplasm of external female genitalia NOS
  • Malignant neoplasm of pudendum

The following code(s) above C51.9 contain annotation back-references

 that may be applicable to C51.9:

  • C00-D49  Neoplasms
  • C51-C58  Malignant neoplasms of female genital organs
  • C51  Malignant neoplasm of vulva

Approximate Synonyms

  • Basal cell carcinoma of vulva
  • Basal cell carcinoma, vulva
  • Cancer of the vulva
  • Cancer of the vulva, adenocarcinoma
  • Cancer of the vulva, disseminated
  • Cancer of the vulva, pagets disease
  • Cancer of the vulva, pagets disease, invasive
  • Cancer of the vulva, recurrent to primary site
  • Cancer of the vulva, squamous cell
  • Cancer of vulva, disseminated
  • Invasive vulval paget’s disease
  • Malignant melanoma of vulva
  • Melanoma, vulva
  • Paget’s disease of vulva
  • Primary adenocarcinoma of vulva
  • Primary malignant neoplasm of vulva
  • Recurrent primary malignant neoplasm of vulva
  • Squamous cell carcinoma of vulva

Clinical Information

  • Primary or metastatic malignant neoplasm involving the vulva.
  • Vulvar cancer is a rare type of cancer. It forms in a woman’s external genitals, called the vulva. The cancer usually develops slowly over several years. First, precancerous cells grow on vulvar skin. This is called vulvar intraepithelial neoplasia (vin), or dysplasia. Not all vin cases turn into cancer, but it is best to treat it early. Often, vulvar cancer doesn’t cause early symptoms. However, see your doctor for testing if you notice
    • a lump in the vulva
    • vulvar itching or tenderness
    • bleeding that is not your period
    being older and having a human papillomavirus infection are risk factors for vulvar cancer. Treatment varies, depending on your overall health and how advanced the cancer is. It might include laser therapy, surgery, radiation or chemotherapy. nih: national cancer institute

ICD-10-CM C51.9 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 736 Uterine and adnexa procedures for ovarian or adnexal malignancy with mcc
  • 737 Uterine and adnexa procedures for ovarian or adnexal malignancy with cc
  • 738 Uterine and adnexa procedures for ovarian or adnexal malignancy without cc/mcc
  • 739 Uterine and adnexa procedures for non-ovarian and non-adnexal malignancy with mcc
  • 740 Uterine and adnexa procedures for non-ovarian and non-adnexal malignancy with cc
  • 741 Uterine and adnexa procedures for non-ovarian and non-adnexal malignancy without cc/mcc
  • 754 Malignancy, female reproductive system with mcc
  • 755 Malignancy, female reproductive system with cc
  • 756 Malignancy, female reproductive system without cc/mcc

Convert C51.9 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to C51.9: