2026 ICD-10-CM Diagnosis Code C93Monocytic leukemia

ICD-10-CM Codes›C00–D49›C81-C96›C93

ICD-10-CM C93
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C93 is a non-billable ICD-10-CM category code for monocytic leukemia, so it cannot be submitted on claims. Use a more specific code from this category instead, such as C93.00, C93.01, C93.02, and C93.10.

Code Identity

ICD-10-CM Code
C93
Billable Status
No — Non-Billable Category
Code Describes
Monocytic leukemia
Short Description
Monocytic leukemia
Same as the full description in the CMS dataset.
Chapter
C81-C96
Malignant neoplasms of lymphoid, hematopoietic and related tissue

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC93Monocytic leukemia
This CodeC93Monocytic leukemia

Specific Coding for Monocytic leukemiaOverview

Non-specific codes like C93 require more characters. Use one of these billable codes instead:

  • C93.0 for Acute monoblastic/monocytic leukemia

  • Use C93.00 for Acute monoblastic/monocytic leukemia, not having achieved remission

  • Use C93.01 for Acute monoblastic/monocytic leukemia, in remission

  • Use C93.02 for Acute monoblastic/monocytic leukemia, in relapse

  • C93.1 for Chronic myelomonocytic leukemia

  • Use C93.10 for Chronic myelomonocytic leukemia not having achieved remission

  • Use C93.11 for Chronic myelomonocytic leukemia, in remission

  • Use C93.12 for Chronic myelomonocytic leukemia, in relapse

  • C93.3 for Juvenile myelomonocytic leukemia

  • Use C93.30 for Juvenile myelomonocytic leukemia, not having achieved remission

  • Use C93.31 for Juvenile myelomonocytic leukemia, in remission

  • Use C93.32 for Juvenile myelomonocytic leukemia, in relapse

  • C93.9 for Monocytic leukemia, unspecified

  • Use C93.90 for Monocytic leukemia, unspecified, not having achieved remission

  • Use C93.91 for Monocytic leukemia, unspecified in remission

  • Use C93.92 for Monocytic leukemia, unspecified in relapse

  • C93.Z for Other monocytic leukemia

  • Use C93.Z0 for Other monocytic leukemia, not having achieved remission

  • Use C93.Z1 for Other monocytic leukemia, in remission

  • Use C93.Z2 for Other monocytic leukemia, in relapse

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • monocytoid leukemia

Type 1 Excludes

  • personal history of leukemia Z85.6

Patient EducationClinical

Acute Myeloid Leukemia

Leukemia is a term for cancers of the blood cells. Leukemia starts in blood-forming tissues such as the bone marrow. Your bone marrow makes the cells which will develop into white blood cells, red blood cells, and platelets. Each type of cell has a different job:

The full article covers:

  • What is leukemia?
  • What is acute myeloid leukemia (AML)?
  • What causes acute myeloid leukemia (AML)?
  • Who is at risk for acute myeloid leukemia (AML)?
  • What are the symptoms of acute myeloid leukemia (AML)?
  • How is acute myeloid leukemia (AML) diagnosed?
  • What are the treatments for acute myeloid leukemia (AML)?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C93Overview

Is C93 (Monocytic leukemia) a billable code?

No. This is a category header that groups the codes for monocytic leukemia, and headers cannot be submitted on claims. Claims for monocytic leukemia need a more specific code from this category, such as C93.00, C93.01, and C93.02.