D72.820 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupD72.820

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) / Other disorders of blood and blood-forming organs (D70-D77)

D72.820

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Lymphocytosis (symptomatic)

An abnormally high number of lymphocytes (a type of white blood cell) in the blood that is causing symptoms. Lymphocytes are important for immune function, and elevated levels may indicate infection or immune system activation.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

D72.8Other specified disorders of white blood cells D72.82Elevated white blood cell count D72.820Lymphocytosis (symptomatic)

Inclusion Terms

Official

Elevated lymphocytes

Excludes 2

Official

autoimmune disease (systemic) NOS (M35.9)Inherited from D50-D89, D72
certain conditions originating in the perinatal period (P00-P96)Inherited from D50-D89, D72
complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from D50-D89, D72
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Inherited from D50-D89, D72
endocrine, nutritional and metabolic diseases (E00-E88)Inherited from D50-D89, D72
human immunodeficiency virus [HIV] disease (B20)Inherited from D50-D89, D72
injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from D50-D89, D72
neoplasms (C00-D49)Inherited from D50-D89, D72
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from D50-D89, D72
neutropenia (D70)Inherited from D50-D89, D72

Related Codes

Official

D72.821Monocytosis (symptomatic)D72.822Plasmacytosis D72.823Leukemoid reaction D72.824Basophilia D72.825Bandemia

Includes

Official

No Includes notes are included in this display for D72.820. Check the code and parent instructions in the Code Book.

Excludes 1

Official

basophilia (D72.824)Inherited from D72, D72.8, D72.82
immunity disorders (D80-D89)Inherited from D72, D72.8, D72.82
preleukemia (syndrome) (D46.9)Inherited from D72, D72.8, D72.82
leukemia (C91-C95)Inherited from D72, D72.8, D72.82
eosinophilia (D72.1)Inherited from D72, D72.8, D72.82

Code First

Official

No Code First sequencing instructions are included in this display for D72.820. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for D72.820. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for D72.820. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

The '(symptomatic)' designation means the patient must have symptoms related to the elevated lymphocytes

Document the underlying cause if identified, such as viral infection or leukemia, as this may require additional coding

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is D72.820 an HCC code?

No. D72.820 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.

Code: D72.820
Description: Lymphocytosis (symptomatic)
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

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What This Code Means

D72.820 is the ICD-10-CM diagnosis code for lymphocytosis (symptomatic). An abnormally high number of lymphocytes (a type of white blood cell) in the blood that is causing symptoms. Lymphocytes are important for immune function, and elevated levels may indicate infection or immune system activation. D72.820 sits in the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89), within the section covering other disorders of blood and blood-forming organs (d70-d77).

D72.820 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

The '(symptomatic)' designation means the patient must have symptoms related to the elevated lymphocytes.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for D72.820 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•The '(symptomatic)' designation means the patient must have symptoms related to the elevated lymphocytes
•Document the underlying cause if identified, such as viral infection or leukemia, as this may require additional coding