2026 ICD-10-CM Diagnosis Code B67.31Echinococcus granulosus infection, thyroid gland

ICD-10-CM Codes›A00–B99›B65-B83›B67

ICD-10-CM B67.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B67.31 is a billable ICD-10-CM diagnosis code for echinococcus granulosus infection, thyroid gland. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 643 through 645. Coders also document this condition as echinococcus granulosus infection. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections; and Thyroid disorders.

Code Identity

ICD-10-CM Code
B67.31
Billable Status
Yes — Valid for Submission
Code Describes
Echinococcus granulosus infection, thyroid gland
Short Description
Echinococcus granulosus infection, thyroid gland
Same as the full description in the CMS dataset.
Parent Code
B67.3
Echinococcus granulosus infection, other and multiple sites

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB67Echinococcosis
This CodeB67.31Echinococcus granulosus infection, thyroid gland

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Echinococcus granulosus infection
  • Echinococcus granulosus infection of thyroid
  • Thyroid infection

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.

    • Echinococcus(infection)
      • granulosus
        • thyroid
    • Echinococcus(infection)
      • thyroid NEC
        • granulosus

Clinical ClassificationClinical

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

CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No
CCSR END001
Thyroid disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

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 B67.31 to ICD-9-CMHistory

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

ICD-9-CM
122.2 Echinococc gran thyroid
Exact Match The mapping is direct, with no qualifiers.

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 B67.31Overview

Is B67.31 (Echinococcus granulosus infection, other and multiple sites) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report echinococcus granulosus infection, thyroid gland on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B67.31 group to?

When echinococcus granulosus infection, thyroid gland is the principal diagnosis on an inpatient stay, it groups to MS-DRG 643, 644, 645, with relative weights from 0.7683 to 1.6461 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B67.31?

Under the General Equivalence Mappings, echinococcus granulosus infection, thyroid gland converts to ICD-9-CM 122.2 (echinococc gran thyroid). The mapping is a direct match.

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.