2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 643 through 645. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 4 closely related codes. 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B67.31: its own notes plus those printed at B67 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From B67 Echinococcosis applies to 14 codes
  • hydatidosis
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B67.31, its category, or a range that includes it.

Applicable To 1

These notes mention B67.31.

  • B81.4 Mixed intestinal helminthiases
    Infection due to intestinal helminths classified to more than one of the categories B65.0-B81.3 and B81.8 names B65.0-B81.3, which includes this code

Excludes1 1

These codes carry an Excludes1 note naming B67.31: they are not reported together with it, unless the two conditions are unrelated.

  • E35 Disorders of endocrine glands in diseases classified elsewhere
    Echinococcus granulosus infection of thyroid gland (B67.3) names B67.3, which includes this code

Code First 2

These codes say to code first a condition named in the note, and B67.31 is one of the conditions named.

  • D77 Other disorders of blood and blood-forming organs in diseases classified elsewhere
    echinococcosis (B67.0-B67.9) names B67.0-B67.9, which includes this code
  • K67 Disorders of peritoneum in infectious diseases classified elsewhere
    helminthiasis (B65.0 -B83.9) names B65.0 -B83.9, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Clinical InformationClinical

  • Echinococcosis

    an infection caused by the infestation of the larval form of tapeworms of the genus echinococcus. the liver, lungs, and kidney are the most common areas of infestation.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B67.31Overview

What is the ICD-10 code for echinococcus granulosus infection, thyroid gland?

The ICD-10-CM code for echinococcus granulosus infection, thyroid gland is B67.31 (sometimes written as B6731). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 644, 645, 643, with relative weights from 0.7461 to 1.6138 depending on complications. Higher weights mean higher Medicare reimbursement.

Is B67.31 a CC or MCC?

CMS lists B67.31 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 4 closely related codes in its exclusion list.

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.