2027 ICD-10-CM Diagnosis Code B88.01Infestation by Demodex mites

ICD-10-CM Codes›A00–B99›B85-B89›B88

ICD-10-CM B88.01
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B88.01 is a billable ICD-10-CM diagnosis code for infestation by Demodex mites. 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 demodectic blepharitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders; and Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B88.01
Billable Status
Yes — Valid for Submission
Code Describes
Infestation by Demodex mites
Short Description
Infestation by Demodex mites
Same as the full description in the CMS dataset.
Parent Code
B88.0
Other acariasis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB85-B89Pediculosis, acariasis and other infestations
CategoryB88Other infestations
This CodeB88.01Infestation by Demodex mites

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Demodectic blepharitis
  • Demodex acne
  • Infestation by Demodex
  • Infestation by Demodex canis
  • Infestation by Demodex cati
  • Infestation by Demodex criceti
  • Infestation by Demodex folliculorum
  • Infestation by Demodex phylloides
  • Parasitic infestation of eyelid caused by Demodex

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B88.01: its own notes plus those printed at B88.0 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 Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • 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.

  • Demodex brevis infestation
  • Demodex folliculorum infestation

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 B88.0 Other acariasis applies to 2 codes
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.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

  • if applicable, eyelid inflammation (H01.8-)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B88.01, its category, or a range that includes it.

Code Also 1

These codes say B88.01 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • H01.8 Other specified inflammations of eyelid
    if applicable, infestation by Demodex mites (B88.01)

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 SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Code History & ChangesHistory

Replacement B88.01 replaces the following previously assigned code(s):

  • B88.0 - Other acariasis
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B88.01Overview

What is the ICD-10 code for infestation by Demodex mites?

The ICD-10-CM code for infestation by Demodex mites is B88.01 (sometimes written as B8801). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is B88.01 (Other acariasis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infestation by Demodex mites on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does B88.01 group to?

When infestation by Demodex mites 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.