ICD-10-CM 2027 diagnosis code
D72.820Lymphocytosis (symptomatic)
D72.820 is a valid, billable ICD-10-CM code for lymphocytosis (symptomatic). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Lymphocytosis.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About D72.820
D72.820 is the ICD-10-CM diagnosis code for Lymphocytosis (symptomatic). It belongs to category D72 (other disorders of white blood cells), block D70-D77 (other disorders of blood and blood-forming organs) and chapter 3 (diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within D72.82 (elevated white blood cell count), D72.820 is specifically for Lymphocytosis (symptomatic). Related codes cover Monocytosis (symptomatic) (D72.821), Plasmacytosis (D72.822), Leukemoid reaction (D72.823), Basophilia (D72.824), Bandemia (D72.825), other elevated white blood cell count (D72.828) and unspecified (D72.829).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 288.61 (Lymphocytosis (symptomatic)).
Coding notes
- Elevated lymphocytes
Notes that apply from higher levels
Instructions written at a parent level also apply to D72.820.
› From D72.82 Elevated white blood cell count
- eosinophilia (D72.1)
Broader instructions also apply from Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to D72.820.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 16 · Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders
ICD-9-CM equivalent
Converter →- 288.61Lymphocytosis (symptomatic)exact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about D72.820
Is D72.820 billable?
- Yes. D72.820 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D72.820 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D72.820 as a principal diagnosis.
Is D72.820 a CC or MCC?
- No. D72.820 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does D72.820 group to?
- D72.820 is used in the MS-DRG v44.0 logic for MS-DRG 814 (Reticuloendothelial and Immunity Disorders with MCC), MS-DRG 815 (Reticuloendothelial and Immunity Disorders with CC) and MS-DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for D72.820?
- The CMS General Equivalence Mappings map D72.820 to ICD-9-CM 288.61.