2026 ICD-10-CM Diagnosis Code B88.3External hirudiniasis
ICD-10-CM Codes›A00–B99›B85-B89›B88
- Billable — Valid for Submission
- Not Chronic
B88.3 is a billable ICD-10-CM diagnosis code for external hirudiniasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. Coders also document this condition as disease caused by Annelida. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Disease caused by Annelida
- External hirudiniasis
- Infestation by Hirudo medicinalis
- Leech infestation
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Leech infestation NOS
Type 2 Excludes
- internal hirudiniasis B83.4
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- external - B88.3
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Hirudiniasis
- external
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
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Convert B88.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B88.3Overview
Is B88.3 (Other infestations) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report external hirudiniasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B88.3 group to?
When external hirudiniasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of B88.3?
Under the General Equivalence Mappings, external hirudiniasis converts to ICD-9-CM 134.2 (hirudiniasis). 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.
