D72.821 ICD-10-CM Code: Monocytosis (symptomatic)
D72.821 is the billable ICD-10-CM code for “Monocytosis (symptomatic)” in the FY 2027 U.S. code set, effective Oct 1, 2026.
Official description
D72.821Monocytosis (symptomatic)
ICD-10-CM diagnosis code · United States clinical modification
Where D72.821 sits
- 1
Chapter 3
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
- 2
Section
Other disorders of blood and blood-forming organs (D70-D77)
- 3
Category D72
Other disorders of white blood cells
- 4
Subcategory D72.82
Elevated white blood cell count
- 5
Code D72.821
Monocytosis (symptomatic)
Notes for this code
Inclusion terms
No inclusion terms are listed for D72.821.
Code first
No “code first” instruction is listed for D72.821.
Use additional code
No “use additional code” instruction is listed for D72.821.
Excludes1
Conditions that should not be reported together with this code.
- infectious mononucleosis (B27.-)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for D72.821.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code D72.821 mean?
D72.821 is the FY 2027 U.S. ICD-10-CM code for “Monocytosis (symptomatic).”
Is D72.821 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, D72.821 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is D72.821 located in ICD-10-CM?
D72.821 is listed in Chapter 3, Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89), within Other disorders of blood and blood-forming organs (D70-D77) (D70–D77), under category D72, Other disorders of white blood cells and subcategory D72.82, Elevated white blood cell count.
What coding notes are listed for D72.821?
No inclusion terms are listed for D72.821 in this reference record. No code-first instruction is listed. Excludes1 notes: infectious mononucleosis (B27.-). No Excludes2 note is listed.