2027 ICD-10-CM Diagnosis Code B85Pediculosis and phthiriasis

ICD-10-CM Codes›A00–B99›B85-B89›B85

ICD-10-CM B85
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B85 is a non-billable ICD-10-CM category code for pediculosis and phthiriasis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B85.0, B85.1, B85.2, and B85.3.

Code Identity

ICD-10-CM Code
B85
Billable Status
No — Non-Billable Category
Code Describes
Pediculosis and phthiriasis
Short Description
Pediculosis and phthiriasis
Same as the full description in the CMS dataset.
Chapter
B85-B89
Pediculosis, acariasis and other infestations

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB85-B89Pediculosis, acariasis and other infestations
CategoryB85Pediculosis and phthiriasis
This CodeB85Pediculosis and phthiriasis

Specific Coding for Pediculosis and phthiriasisOverview

Non-specific codes like B85 require more characters. Use one of these billable codes instead:

  • Use B85.0 for Pediculosis due to Pediculus humanus capitis

  • Use B85.1 for Pediculosis due to Pediculus humanus corporis

  • Use B85.2 for Pediculosis, unspecified

  • Use B85.3 for Phthiriasis

  • Use B85.4 for Mixed pediculosis and phthiriasis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B85: 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.

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.

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Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

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 B85Overview

What is the ICD-10 code for pediculosis and phthiriasis?

B85 is the ICD-10-CM category for pediculosis and phthiriasis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is B85 (Pediculosis and phthiriasis) a billable code?

No. This is a category header that groups the codes for pediculosis and phthiriasis, and headers cannot be submitted on claims. Claims for pediculosis and phthiriasis need a more specific code from this category, such as B85.0, B85.1, and B85.2.