2021 ICD-10-CM Diagnosis Code B85.4

Mixed pediculosis and phthiriasis

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • B85.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM B85.4 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of B85.4 - other international versions of ICD-10 B85.4 may differ.
Applicable To
  • Infestation classifiable to more than one of the categories
    ICD-10-CM Diagnosis Code B85.0

    Pediculosis due to Pediculus humanus capitis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Head-louse infestation
    B85.0-
    ICD-10-CM Diagnosis Code B85.3

    Phthiriasis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Infestation by crab-louse
    • Infestation by Phthirus pubis
    B85.3
The following code(s) above B85.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to B85.4:
  • A00-B99
    2021 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • 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 to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
Approximate Synonyms
  • Mixed pediculosis
  • Pediculosis, mixed
ICD-10-CM B85.4 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert B85.4 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to B85.4:
  • Infestation B88.9
    ICD-10-CM Diagnosis Code B88.9

    Infestation, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Infestation (skin) NOS
    • Infestation by mites NOS
    • Skin parasites NOS
    • Pediculus B85.2
      ICD-10-CM Diagnosis Code B85.2

      Pediculosis, unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • mixed B85.4 (classifiable to more than one of the titles B85.0-B85.3)
  • Lice (infestation) B85.2
    ICD-10-CM Diagnosis Code B85.2

    Pediculosis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • mixed B85.4 (classifiable to more than one of the titles B85.0-B85.3)
  • Pediculosis (infestation) B85.2
    ICD-10-CM Diagnosis Code B85.2

    Pediculosis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • mixed B85.4 (classifiable to more than one of the titles B85.0-B85.3)

ICD-10-CM Codes Adjacent To B85.4
B83.2 Angiostrongyliasis due to Parastrongylus cantonensis
B83.3 Syngamiasis
B83.4 Internal hirudiniasis
B83.8 Other specified helminthiases
B83.9 Helminthiasis, unspecified
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
B85.4 Mixed pediculosis and phthiriasis
B86 Scabies
B87 Myiasis
B87.0 Cutaneous myiasis
B87.1 Wound myiasis
B87.2 Ocular myiasis
B87.3 Nasopharyngeal myiasis
B87.4 Aural myiasis
B87.8 Myiasis of other sites
B87.81 Genitourinary myiasis
B87.82 Intestinal myiasis

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.