2021 ICD-10-CM Code C83.9

Non-follicular (diffuse) lymphoma, unspecified

Version 2021

Not Valid for Submission

C83.9 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of non-follicular (diffuse) lymphoma, unspecified. The code is not specific and is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like C83.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Short Description:Non-follicular (diffuse) lymphoma, unspecified
Long Description:Non-follicular (diffuse) lymphoma, unspecified

Code Classification

Specific Coding for Non-follicular (diffuse) lymphoma, unspecified

Non-specific codes like C83.9 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for non-follicular (diffuse) lymphoma, unspecified:

  • BILLABLE CODE - Use C83.90 for Non-follicular (diffuse) lymphoma, unspecified, unspecified site
  • BILLABLE CODE - Use C83.91 for Non-follicular (diffuse) lymphoma, unspecified, lymph nodes of head, face, and neck
  • BILLABLE CODE - Use C83.92 for Non-follicular (diffuse) lymphoma, unspecified, intrathoracic lymph nodes
  • BILLABLE CODE - Use C83.93 for Non-follicular (diffuse) lymphoma, unspecified, intra-abdominal lymph nodes
  • BILLABLE CODE - Use C83.94 for Non-follicular (diffuse) lymphoma, unspecified, lymph nodes of axilla and upper limb
  • BILLABLE CODE - Use C83.95 for Non-follicular (diffuse) lymphoma, unspecified, lymph nodes of inguinal region and lower limb
  • BILLABLE CODE - Use C83.96 for Non-follicular (diffuse) lymphoma, unspecified, intrapelvic lymph nodes
  • BILLABLE CODE - Use C83.97 for Non-follicular (diffuse) lymphoma, unspecified, spleen
  • BILLABLE CODE - Use C83.98 for Non-follicular (diffuse) lymphoma, unspecified, lymph nodes of multiple sites
  • BILLABLE CODE - Use C83.99 for Non-follicular (diffuse) lymphoma, unspecified, extranodal and solid organ sites

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code C83.9 are found in the index:

Information for Patients


Also called: Non-Hodgkin lymphoma

Lymphoma is a cancer of a part of the immune system called the lymph system. There are many types of lymphoma. One type is Hodgkin disease. The rest are called non-Hodgkin lymphomas.

Non-Hodgkin lymphomas begin when a type of white blood cell, called a T cell or B cell, becomes abnormal. The cell divides again and again, making more and more abnormal cells. These abnormal cells can spread to almost any other part of the body. Most of the time, doctors don't know why a person gets non-Hodgkin lymphoma. You are at increased risk if you have a weakened immune system or have certain types of infections.

Non-Hodgkin lymphoma can cause many symptoms, such as

Your doctor will diagnose lymphoma with a physical exam, blood tests, a chest x-ray, and a biopsy. Treatments include chemotherapy, radiation therapy, targeted therapy, biological therapy, or therapy to remove proteins from the blood. Targeted therapy uses substances that attack cancer cells without harming normal cells. Biologic therapy boosts your body's own ability to fight cancer. If you don't have symptoms, you may not need treatment right away. This is called watchful waiting.

NIH: National Cancer Institute

[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)