2023

  1. ICD-10-CM Codes
    2. ›
  2. C00-D49
    3. ›
  3. C81-C96
    4. ›
  4. C95-
    5. ›
  5. 2023 ICD-10-CM Diagnosis Code C95.1

2023 ICD-10-CM Diagnosis Code C95.1

Chronic leukemia of unspecified cell type

    2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
  • C95.1 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 C95.1 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of C95.1 - other international versions of ICD-10 C95.1 may differ.
The following code(s) above C95.1 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 C95.1:
  • 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
  • C95
    ICD-10-CM Diagnosis Code C95

    Leukemia of unspecified cell type

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • personal history of leukemia (Z85.6)
    Leukemia of unspecified cell type
Clinical Information
  • A slowly progressing cancer that starts in blood-forming tissues such as the bone marrow, and causes large numbers of white blood cells to be produced and enter the blood stream.
  • A slowly progressing leukemia characterized by a clonal (malignant) proliferation of maturing and mature myeloid cells or mature lymphocytes. When the clonal cellular population is composed of myeloid cells, the process is called chronic myelogenous leukemia. When the clonal cellular population is composed of lymphocytes, it is classified as chronic lymphocytic leukemia, hairy cell leukemia, or t-cell large granular lymphocyte leukemia.
  • Leukemia in which the involved cell is well differentiated, usually b-lymphocytes, but immunologically incompetent; types distinguished include chronic granulocytic, chronic lymphocytic, chronic myelomonocytic, eosinophilic and hairy cell leukemia.
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

Diagnosis Index entries containing back-references to C95.1:
  • Leukemia, leukemic C95.9-
    ICD-10-CM Diagnosis Code C95.9-

    Leukemia, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    • unspecified cell type C95.9-
      ICD-10-CM Diagnosis Code C95.9-

      Leukemia, unspecified

        2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
      • chronic C95.1-

ICD-10-CM Codes Adjacent To C95.1
C94.6 Myelodysplastic disease, not elsewhere classified
C94.8 Other specified leukemias
C94.80 …… not having achieved remission
C94.81 …… in remission
C94.82 …… in relapse
C95 Leukemia of unspecified cell type
C95.0 Acute leukemia of unspecified cell type
C95.00 …… not having achieved remission
C95.01 …… in remission
C95.02 …… in relapse
C95.1 Chronic leukemia of unspecified cell type
C95.10 …… not having achieved remission
C95.11 …… in remission
C95.12 …… in relapse
C95.9 Leukemia, unspecified
C95.90 …… not having achieved remission
C95.91 …… in remission
C95.92 …… in relapse
C96 Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue
C96.0 Multifocal and multisystemic (disseminated) Langerhans-cell histiocytosis
C96.2 Malignant mast cell neoplasm

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

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