2027 ICD-10-CM Diagnosis Code B88.9Infestation, unspecified
ICD-10-CM Codes›A00–B99›B85-B89›B88
- Billable — Valid for Submission
- Not Chronic
B88.9 is a billable ICD-10-CM diagnosis code for infestation, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. Coders also document this condition as dermatosis caused by parasite. 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.
- Dermatosis caused by parasite
- Inflammation of skin due to parasite
- Parasitic skin infestation
- Skin infestation
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B88.9: its own notes plus those printed at 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.
- diseases generally recognized as communicable or transmissible
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Infestation (skin) NOS
- Infestation by mites NOS
- Skin parasites NOS
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.
- 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.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
Infestation B88.9
Mite (s) (infestation) B88.9
skin B88.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Infestation
invasion of the body by complex organisms that are typically non-microscopic such as worms and arthropods.
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 B88.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B88.9Overview
What is the ICD-10 code for infestation, unspecified?
The ICD-10-CM code for infestation, unspecified is B88.9 (sometimes written as B889). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B88.9 (Other infestations) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report infestation, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B88.9 group to?
When infestation, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of B88.9?
Under the General Equivalence Mappings, infestation, unspecified converts to ICD-9-CM 134.9 (infestation NOS). The mapping is approximate, so confirm the match fits the documentation.
