ICD-10-CM Codes
C00-D49
C81-C96
C93-
2023 ICD-10-CM Diagnosis Code C93.1

2023 ICD-10-CM Diagnosis Code C93.1

Chronic myelomonocytic leukemia

2016

2017

2018

2019

2020

2021

2022

2023

Non-Billable/Non-Specific Code

C93.1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2023 edition of ICD-10-CM C93.1 became effective on October 1, 2022.
This is the American ICD-10-CM version of C93.1 - other international versions of ICD-10 C93.1 may differ.

Applicable To

Chronic monocytic leukemia
CMML-1
CMML-2
CMML with eosinophilia

Code Also

Code Also Help

A code also note instructs that 2 codes may be required to fully describe a condition but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the encounter.

, if applicable, eosinophilia (
ICD-10-CM Diagnosis Code D72.18
Eosinophilia in diseases classified elsewhere
Code First
- underlying disease, such as:
- chronic myelomonocytic leukemia (C93.1-)
D72.18
)

The following code(s) above C93.1 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to C93.1:

C00-D49
2023 ICD-10-CM Range C00-D49
Neoplasms
Note
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Neoplasms
C81-C96
2023 ICD-10-CM Range C81-C96
Malignant neoplasms of lymphoid, hematopoietic and related tissue
Type 2 Excludes
- Kaposi's sarcoma of lymph nodes (C46.3)
- secondary and unspecified neoplasm of lymph nodes (C77.-)
- secondary neoplasm of bone marrow (C79.52)
- secondary neoplasm of spleen (C78.89)
Malignant neoplasms of lymphoid, hematopoietic and related tissue
C93
ICD-10-CM Diagnosis Code C93
Monocytic leukemia
Includes
- monocytoid leukemia
Type 1 Excludes
- personal history of leukemia (Z85.6)
Monocytic leukemia

Clinical Information

A chronic myelomonocytic leukemia characterized by a peripheral blood eosinophil count of equal or greater than 1.5x10e9/l, and absence of pdgfra or pdgfrb gene abnormalities.
A chronic myelomonocytic leukemia characterized by the presence of 10-19 percent blasts in the bone marrow and 5-19 percent blasts in the peripheral blood or by the presence of auer rods regardless of the blasts count.
A chronic myelomonocytic leukemia characterized by the presence of less than 10 percent blasts in the bone marrow and less than 5 percent blasts in the peripheral blood.
A myelodysplastic/myeloproliferative neoplasm which is characterized by persistent monocytosis, absence of a philadelphia chromosome and bcr/abl fusion gene, fewer than 20 percent blasts in the bone marrow and blood, myelodysplasia, and absence of pdgfra or pdgfrb rearrangement.
A myelodysplastic-myeloproliferative disease characterized by monocytosis, increased monocytes in the bone marrow, variable degrees of dysplasia, but an absence of immature granulocytes in the blood.
A slowly progressing type of myelodysplastic/myeloproliferative disease in which too many myelomonocytes (a type of white blood cell) are in the bone marrow, crowding out other normal blood cells, such as other white blood cells, red blood cells, and platelets.

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to C93.1:

Code Also: D47.02

ICD-10-CM Diagnosis Code D47.02
Systemic mastocytosis
Applicable To
- Indolent systemic mastocytosis
- Isolated bone marrow mastocytosis
- Smoldering systemic mastocytosis
- Systemic mastocytosis, with an associated hematological non-mast cell lineage disease (SM-AHNMD)
Code Also
- , if applicable, any associated hematological non-mast cell lineage disease, such as:
- acute myeloid leukemia (C92.6-, C92.A-)
- chronic myelomonocytic leukemia (C93.1-)
- essential thrombocytosis (D47.3)
- hypereosinophilic syndrome (D72.1)
- myelodysplastic syndrome (D46.9)
- myeloproliferative syndrome (D47.1)
- non-Hodgkin lymphoma (C82-C85)
- plasma cell myeloma (C90.0-)
- polycythemia vera (D45)
Type 1 Excludes
- aggressive systemic mastocytosis (C96.21)
- mast cell leukemia (C94.3-)
Code First: D72.18

ICD-10-CM Diagnosis Code D72.18
Eosinophilia in diseases classified elsewhere
Code First
- underlying disease, such as:
- chronic myelomonocytic leukemia (C93.1-)
Type 1 Excludes: D46.Z
, C92.1

ICD-10-CM Diagnosis Code D46.Z
Other myelodysplastic syndromes
Type 1 Excludes
- chronic myelomonocytic leukemia (C93.1-)
ICD-10-CM Diagnosis Code C92.1
Chronic myeloid leukemia, BCR/ABL-positive
Applicable To
- Chronic myelogenous leukemia, Philadelphia chromosome (Ph1) positive
- Chronic myelogenous leukemia, t(9;22) (q34;q11)
- Chronic myelogenous leukemia with crisis of blast cells
Type 1 Excludes
- atypical chronic myeloid leukemia BCR/ABL-negative (C92.2-)
- chronic myelomonocytic leukemia (C93.1-)
- chronic myeloproliferative disease (D47.1)

Diagnosis Index entries containing back-references to C93.1:

Leukemia, leukemic C95.9-
ICD-10-CM Diagnosis Code C95.9-
Leukemia, unspecified
- chronic monocytic C93.1-
- chronic myelomonocytic C93.1-
- CMML C93.1- (-1) (-2) (with eosinophilia)
Naegeli's
- leukemia, monocytic C93.1-

ICD-10-CM Codes Adjacent To C93.1

C92.Z2 …… in relapse

C92.9 Myeloid leukemia, unspecified

C92.90 …… not having achieved remission

C92.91 …… in remission

C92.92 …… in relapse

C93 Monocytic leukemia

C93.0 Acute monoblastic/monocytic leukemia

C93.00 …… not having achieved remission

C93.01 …… in remission

C93.02 …… in relapse

C93.1 Chronic myelomonocytic leukemia

C93.10 …… not having achieved remission

C93.11 …… in remission

C93.12 …… in relapse

C93.3 Juvenile myelomonocytic leukemia

C93.30 …… not having achieved remission

C93.31 …… in remission

C93.32 …… in relapse

C93.Z Other monocytic leukemia

C93.Z0 …… not having achieved remission

C93.Z1 …… in remission

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2023 ICD-10-CM Diagnosis Code C93.1

Chronic myelomonocytic leukemia

Eosinophilia in diseases classified elsewhere

Neoplasms

Malignant neoplasms of lymphoid, hematopoietic and related tissue

Monocytic leukemia

Systemic mastocytosis

Eosinophilia in diseases classified elsewhere

Other myelodysplastic syndromes

Chronic myeloid leukemia, BCR/ABL-positive

Leukemia, unspecified