D72.820 – Lymphocytosis (symptomatic)

ICD-10-CM 2027 diagnosis code · Other disorders of blood and blood-forming organs

Billable code

ICD-10-CM code D72.820

Code: D72.820 (claims format: D72820)
Description: Lymphocytosis (symptomatic)
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
Block: D70-D77 Other disorders of blood and blood-forming organs
Parent codes: D72 › D72.8 › D72.82

Notes for D72.820

Applicable to:

Elevated lymphocytes

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

D72 – Other disorders of white blood cells

Excludes1 (not coded here):

basophilia (D72.824)
immunity disorders (D80-D89)
preleukemia (syndrome) (D46.9)

Excludes2 (not included here):

neutropenia (D70)

D72.8 – Other specified disorders of white blood cells

Excludes1 (not coded here):

leukemia (C91-C95)

D72.82 – Elevated white blood cell count

Excludes1 (not coded here):

eosinophilia (D72.1)

Index terms for D72.820

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in D72.82

D72.821 – Monocytosis (symptomatic)Billable
D72.822 – PlasmacytosisBillable
D72.823 – Leukemoid reactionBillable
D72.824 – BasophiliaBillable
D72.825 – BandemiaBillable
D72.828 – Other elevated white blood cell countBillable
D72.829 – Elevated white blood cell count, unspecifiedBillable

Frequently asked questions

What is ICD-10 code D72.820?

D72.820 is the ICD-10-CM code for lymphocytosis (symptomatic), in the block D70-D77 (Other disorders of blood and blood-forming organs).

Is D72.820 a billable code?

Yes. D72.820 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does D72.820 belong to?

It belongs to category D72 – Other disorders of white blood cells.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.