2021 ICD-10-CM Code C91.01

Acute lymphoblastic leukemia, in remission

Version 2021

Valid for Submission

C91.01 is a billable diagnosis code used to specify a medical diagnosis of acute lymphoblastic leukemia, in remission. The code C91.01 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code C91.01 might also be used to specify conditions or terms like acute lymphoid leukemia in remission, acute lymphoid leukemia in remission, acute lymphoid leukemia in remission, disorder of central nervous system co-occurrent and due to acute lymphoid leukemia, disorder of central nervous system co-occurrent and due to acute lymphoid leukemia in remission , lymphoid leukemia in remission, etc.

ICD-10:C91.01
Short Description:Acute lymphoblastic leukemia, in remission
Long Description:Acute lymphoblastic leukemia, in remission

Code Classification

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert C91.01 to ICD-9 Code

Information for Patients


Acute Lymphocytic Leukemia

Also called: ALL, Acute lymphoblastic leukemia

Leukemia is cancer of the white blood cells. White blood cells help your body fight infection. Your blood cells form in your bone marrow. In leukemia, however, the bone marrow produces abnormal white blood cells. These cells crowd out the healthy blood cells, making it hard for blood to do its work. In acute lymphocytic leukemia (ALL), also called acute lymphoblastic leukemia, there are too many of specific types of white blood cells called lymphocytes or lymphoblasts. ALL is the most common type of cancer in children.

Possible risk factors for ALL include being male, being white, previous chemotherapy treatment, exposure to radiation, and for adults, being older than 70.

Symptoms of ALL include:

Tests that examine the blood and bone marrow diagnose ALL. Treatments include chemotherapy, radiation therapy, stem cell transplants, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. Once the leukemia is in remission, you need additional treatment to make sure that it does not come back.

NIH: National Cancer Institute


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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)