Pediculosis and phthiriasis (B85) ICD-10-CM
The B85 code range covers pediculosis and phthiriasis with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the B85 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B85 range.
Lice Infestations
Parasitic attack or subsistence on the skin by members of the order Phthiraptera, especially on humans by Pediculus humanus of the family Pediculidae. The hair of the head, eyelashes, and pubis is a frequent site of infestation. (From Dorland, 28th ed; Stedman, 26th ed)
Pediculosis Pubis
Infestation of the pubic hair by the pthirus pubis parasite which results in mild to intense itching and macular lesions. The parasite, also known as crab lice, is transmitted through skin to skin contact with an infected person or through direct contact with infested objects.
About the B85 Code Range
Pediculosis and phthiriasis are louse infestations. Phthiriasis refers to pubic lice.
The subdivisions distinguish head lice (B85.0) from body lice (B85.1). They also identify unspecified pediculosis (B85.2), phthiriasis (B85.3), and both together (B85.4).
Questions About This Page
How many billable codes are in the B85 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the B85 range classify?
The range classifies pediculosis and phthiriasis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
