2026 ICD-10-CM Diagnosis Code C93.90Monocytic leukemia, unspecified, not having achieved remission
ICD-10-CM Codes›C00–D49›C81-C96›C93
- Billable — Valid for Submission
- Chronic Condition
C93.90 is a billable ICD-10-CM diagnosis code for monocytic leukemia, unspecified, not having achieved remission. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 820 through 825, 840 through 842. Coders also document this condition as leukemic infiltration of skin. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Leukemia - all other types.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Leukemic infiltration of skin
- Leukemic infiltration of skin in monocytic leukemia
- Leukemic infiltration of skin in myeloid leukemia
- Monocytic leukemia
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Monocytic leukemia, unspecified with failed remission
- Monocytic leukemia, unspecified NOS
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Convert C93.90 to ICD-9-CMHistory
Code HistoryHistory
Questions About C93.90Overview
Is C93.90 (Monocytic leukemia, unspecified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report monocytic leukemia, unspecified, not having achieved remission on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C93.90 group to?
When monocytic leukemia, unspecified, not having achieved remission is the principal diagnosis on an inpatient stay, it groups to MS-DRG 820, 821, 822, 823, 824, 825, 840, 841, 842, with relative weights from 1.0104 to 5.8648 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of C93.90?
Under the General Equivalence Mappings, monocytic leukemia, unspecified, not having achieved remission converts to ICD-9-CM 206.20 (sbac mno leu wo ach rmsn) and 206.90 (uns mno leu wo ach rmsn). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
