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v1.0.0
ICD-10 Guide
DiagnosesAcute Leukemia

Acute Leukemia

ICD-10 Coding for Acute Leukemia(C91.0, C92.0)

PRIMARY SPECIALTYHematology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Acute Leukemia?
Essential facts and insights about Acute Leukemia

Key Clinical Considerations:

  • Presence of symptoms such as fatigue, fever, easy bruising, or bleeding.
  • Laboratory findings including elevated white blood cell count, presence of blast cells in peripheral blood or bone marrow.
  • Physical examination may reveal splenomegaly, hepatomegaly, or lymphadenopathy.
  • Imaging studies are typically not required for diagnosis but may be used to assess organ involvement.
  • Staging is not typically used for acute leukemia; however, risk stratification may be based on cytogenetic abnormalities.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Complete blood count (CBC) results showing leukocytosis or thrombocytopenia must be documented.
  • Specific terminology such as 'acute myeloid leukemia' (AML) or 'acute lymphoblastic leukemia' (ALL) must be used.
  • Examples include documenting the presence of specific cytogenetic markers or mutations.
  • Medical necessity must be established through documentation of symptoms and laboratory findings.
  • Quality measures may include documentation of treatment response and follow-up care.

Coding Guidelines

Usage Guidelines & Examples

  • Use C91.0 for acute lymphoblastic leukemia and C92.0 for acute myeloid leukemia based on the type diagnosed.
  • Do not use these codes for chronic leukemias or other hematological malignancies.
  • C91.9 (leukemia, unspecified) may be used when the specific type is not determined.
  • Common errors include misclassifying acute leukemia as chronic; ensure laboratory findings support the diagnosis.
  • In complex cases, consider additional codes for associated conditions or complications.

Code Exclusions

Important Exclusions

  • Chronic leukemias (C91.1, C91.2) are explicitly excluded.
  • Use C91.9 for unspecified leukemia when the type is not determined.
  • Conditions are excluded to ensure accurate coding and treatment pathways.
  • Common mistakes include coding acute leukemia when chronic forms are present; verify laboratory results.
  • Related conditions such as myelodysplastic syndromes should be coded separately.

Related ICD-10 Codes

Primary Codes
C91.0
Acute lymphoblastic leukemia
C92.0
Acute myeloid leukemia
Ancillary Codes
D61.818
D65
Differential Codes
C92.0
C91.0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Hematology

Specialty Applications

  • Applies to patients diagnosed with acute leukemia, including both AML and ALL.
  • Patient populations include children and adults, with varying risk factors such as genetic predisposition.
  • Clinical settings include inpatient hospital admissions for treatment and outpatient follow-up.
  • Specialty-specific applications are relevant in hematology and oncology practices.
  • Treatment contexts include chemotherapy, targeted therapy, and potential stem cell transplantation.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with acute leukemia based on CBC findings and bone marrow biopsy results.'

Template 2

Template: 'Clinical presentation consistent with acute lymphoblastic leukemia including fatigue and lymphadenopathy.'

Template 3

Template: 'Diagnostic criteria for acute myeloid leukemia met as evidenced by blast cells in peripheral blood.'

Template 4

Template: 'Treatment plan initiated for acute leukemia with chemotherapy regimen outlined.'

Template 5

Template: 'Follow-up care for acute leukemia including monitoring of blood counts and treatment response.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation must include clinical findings, laboratory results, and treatment plans.

How does this differ from similar diagnoses?

Acute leukemia is characterized by rapid progression and specific laboratory findings, unlike chronic forms.

What are common billing considerations?

Ensure that all services provided are medically necessary and supported by documentation.

What procedures are typically associated?

Common procedures include bone marrow biopsy and cytogenetic testing.

Are there any quality reporting implications?

Quality measures may include tracking treatment response and patient outcomes.