2026 ICD-10-CM Diagnosis Code B69.81Myositis in cysticercosis

ICD-10-CM Codes›A00–B99›B65-B83›B69

ICD-10-CM B69.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B69.81 is a billable ICD-10-CM diagnosis code for myositis in cysticercosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 371 through 373. Coders also document this condition as cestode myositis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders; and Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B69.81
Billable Status
Yes — Valid for Submission
Code Describes
Myositis in cysticercosis
Short Description
Myositis in cysticercosis
Same as the full description in the CMS dataset.
Parent Code
B69.8
Cysticercosis of other sites

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB69Cysticercosis
This CodeB69.81Myositis in cysticercosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cestode myositis
  • Cysticercosis myositis
  • Parasitic myositis

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.

    • Cysticercosis, cysticerciasis
      • with
        • myositis
    • Myositis
      • in (due to)
        • cysticercosis

Clinical ClassificationClinical

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

CCSR MUS026
Muscle disorders
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Read the full article at MedlinePlus

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

Convert B69.81 to ICD-9-CMHistory

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

ICD-9-CM
123.1 Cysticercosis
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 B69.81Overview

Is B69.81 (Cysticercosis of other sites) a billable code?

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

What MS-DRG does B69.81 group to?

When myositis in cysticercosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 371, 372, 373, with relative weights from 0.7274 to 1.7731 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B69.81?

Under the General Equivalence Mappings, myositis in cysticercosis converts to ICD-9-CM 123.1 (cysticercosis). 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.