B85.3 Phthiriasis

Billable ICD-10-CM code, FY2026.

Applicable to

• Infestation by crab-louse
• Infestation by Phthirus pubis

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 132.2 Phthirus pubis [pubic louse]

Code annotations containing back-references to B85.3

Back-references to B85

• Code First: H94.0 Acoustic neuritis in infectious and parasitic diseases classified elsewhere ("parasitic disease (B65-B89)")

Diagnosis Index entries for B85.3

• Crabs, meaning pubic lice
• Infestation › crab-lice
• Infestation › eyelid › in (due to) › phthiriasis
• Infestation › Pediculus › pubis (any site)
• Infestation › Phthirus (pubis) (any site)
• Infestation › pubic, louse
• Lice (infestation) › crab
• Lice (infestation) › pubic (Phthirus pubis)
• Pediculosis (infestation) › pubis (pubic louse) (any site)
• Pediculosis (infestation) › vulvae
• Phthiriasis (pubis)

Nearby codes

• B85 Pediculosis and phthiriasis
• B85.0 Pediculosis due to Pediculus humanus capitis
• B85.1 Pediculosis due to Pediculus humanus corporis
• B85.2 Pediculosis, unspecified
• B85.3 Phthiriasis (this code)
• B85.4 Mixed pediculosis and phthiriasis