2022 ICD-10-CM Code D89.41

Monoclonal mast cell activation syndrome

Version 2021

Valid for Submission

ICD-10:D89.41
Short Description:Monoclonal mast cell activation syndrome
Long Description:Monoclonal mast cell activation syndrome

Code Classification

  • Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50–D89)
    • Certain disorders involving the immune mechanism (D80-D89)
      • Oth disorders involving the immune mechanism, NEC (D89)

D89.41 is a billable diagnosis code used to specify a medical diagnosis of monoclonal mast cell activation syndrome. The code D89.41 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

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 D89.41 are found in the index:

Replacement Code

D8941 replaces the following previously assigned ICD-10 code(s):

Convert D89.41 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code D89.41 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

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