2024 ICD-10-CM Diagnosis Code D47.09

Approximate Synonyms

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

• Localized extracutaneous mastocytosis
• Mast cell disorder
• Mast cell neoplasm
• Mastocytoma
• Systemic mast cell disease

Clinical Information

• Mast-Cell Sarcoma

  a unifocal malignant tumor that consists of atypical pathological mast cells without systemic involvement. it causes local destructive growth in organs other than in skin or bone marrow.

• Mastocytoma

  a solid tumor consisting of a dense infiltration of mast cells. it is generally benign.

• Mastocytoma, Skin

  a variant of cutaneous mastocytosis which occurs as a single lesion usually in infants. it is found mostly in the wrist and trunk and there is no atypical cytomorphology.

• Mast Cells

  granulated cells that are found in almost all tissues, most abundantly in the skin and the gastrointestinal tract. like the basophils, mast cells contain large amounts of histamine and heparin. unlike basophils, mast cells normally remain in the tissues and do not circulate in the blood. mast cells, derived from the bone marrow stem cells, are regulated by the stem cell factor.

D47.09 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Replacement Code

D4709 replaces the following previously assigned ICD-10-CM code(s):

• D47.0 - Histiocytic and mast cell tumors of uncertain behavior
• D47.0 - Mast cell neoplasms of uncertain behavior

Convert D47.09 to ICD-9-CM

• ICD-9-CM Code: 238.5 - Mastocytoma NOS
  Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• 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