2026 ICD-10-CM Diagnosis Code B01.89Other varicella complications

ICD-10-CM Codes›A00–B99›B00-B09›B01

ICD-10-CM B01.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B01.89 is a billable ICD-10-CM diagnosis code for other varicella complications. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 865 through 866. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Viral infection.

Code Identity

ICD-10-CM Code
B01.89
Billable Status
Yes — Valid for Submission
Code Describes
Other varicella complications
Short Description
Other varicella complications
Same as the full description in the CMS dataset.
Parent Code
B01.8
Varicella with other complications

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB00-B09Viral infections characterized by skin and mucous membrane lesions
CategoryB01Varicella [chickenpox]
This CodeB01.89Other varicella complications

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute cerebellar ataxia caused by varicella
  • Anetoderma
  • Anetoderma following varicella
  • Exanthem due to varicella
  • Herpes zoster eyelid dermatitis
  • Herpes zoster infection of eyelid
  • Neurological varicella
  • Secondary cerebellar degeneration
  • Varicella-zoster esophagitis
  • Viral dermatitis of eyelid
  • Viral esophagitis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Varicella
      • with
        • complications NEC

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF008
Viral infection
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Anetoderma

    benign dermatosis caused by a loss of dermal elastic tissue resulting in localized sac-like areas of flaccid skin. it can be either primary (idiopathic) or secondary to other skin conditions, penicillamine use, or premature birth.

  • Viral Esophagitis

    viral infection of the esophagus. it often occurs in immunocompromised patients and it is caused by cytomegalovirus or herpes simplex virus. symptoms include pain on swallowing, fever, and retrosternal burning.

  • Anetoderma

    a dermatologic condition characterized by focal loss of elastic tissue. clinically it presents with atrophic depressions or saccular outpouchings of the skin.

Patient EducationClinical

Chickenpox

Chickenpox is an infection caused by the varicella-zoster virus. Most cases are in children under age 15, but older children and adults can get it. It spreads very easily from one person to another.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert B01.89 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
052.7 Varicella complicat NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
052.8 Varicella complicat NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B01.89Overview

Is B01.89 (Varicella with other complications) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other varicella complications on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B01.89 group to?

When other varicella complications is the principal diagnosis on an inpatient stay, it groups to MS-DRG 865, 866, with relative weights from 0.8696 to 1.4983 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B01.89?

Under the General Equivalence Mappings, other varicella complications converts to ICD-9-CM 052.7 (varicella complicat NEC) and 052.8 (varicella complicat NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.