2020 ICD-10-CM Diagnosis Code O26.4

Herpes gestationis

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • O26.4 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM O26.4 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of O26.4 - other international versions of ICD-10 O26.4 may differ.
The following code(s) above O26.4 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 O26.4:
  • O00-O9A
    2020 ICD-10-CM Range O00-O9A

    Pregnancy, childbirth and the puerperium

    Note
    • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
    • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
    • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
    • 1st trimester- less than 14 weeks 0 days
    • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
    • 3rd trimester- 28 weeks 0 days until delivery
    Type 1 Excludes
    • supervision of normal pregnancy (Z34.-)
    Type 2 Excludes
    • mental and behavioral disorders associated with the puerperium (F53.-)
    • obstetrical tetanus (A34)
    • postpartum necrosis of pituitary gland (E23.0)
    • puerperal osteomalacia (M83.0)
    Use Additional
    • code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
    Pregnancy, childbirth and the puerperium
  • O20-O29
    2020 ICD-10-CM Range O20-O29

    Other maternal disorders predominantly related to pregnancy

    Type 2 Excludes
    • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
    • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
    Other maternal disorders predominantly related to pregnancy
Clinical Information
  • A rare autoimmune bullous dermatitis that develops during pregnancy, most often during the second and third trimesters.
  • An itching, autoimmune, bullous skin disease that occurs during the last two trimesters of pregnancy and puerperium. It also affects non-pregnant females with tissue of placenta origin, such as choriocarcinoma; or hydatidiform mole. It exhibits antigenic and clinical similarity to bullous pemphigoid (pemphigoid, bullous). This disease does not involve herpes viruses (old name, herpes gestationis).
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
Code annotations containing back-references to O26.4:
  • Type 1 Excludes: L12
    ICD-10-CM Diagnosis Code L12

    Pemphigoid

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • herpes gestationis (O26.4-)
    • impetigo herpetiformis (L40.1)
  • Type 2 Excludes: O98
    , O99.7
    ICD-10-CM Diagnosis Code O98

    Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Includes
    • the listed conditions when complicating the pregnant state, when aggravated by the pregnancy, or as a reason for obstetric care
    Type 2 Excludes
    • herpes gestationis (O26.4-)
    • infectious carrier state (O99.82-, O99.83-)
    • obstetrical tetanus (A34)
    • puerperal infection (O86.-)
    • puerperal sepsis (O85)
    • when the reason for maternal care is that the disease is known or suspected to have affected the fetus (O35-O36)
    Use Additional
    • code (Chapter 1), to identify specific infectious or parasitic disease
    ICD-10-CM Diagnosis Code O99.7

    Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    Type 2 Excludes
    • herpes gestationis (O26.4)
    • pruritic urticarial papules and plaques of pregnancy (PUPPP) (O26.86)

Diagnosis Index entries containing back-references to O26.4:
  • Herpes, herpesvirus, herpetic B00.9
    ICD-10-CM Diagnosis Code B00.9

    Herpesviral infection, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Herpes simplex infection NOS
    • gestational, gestationis O26.4-

ICD-10-CM Codes Adjacent To O26.4
O26.2 Pregnancy care for patient with recurrent pregnancy loss
O26.20 …… unspecified trimester
O26.21 …… first trimester
O26.22 …… second trimester
O26.23 …… third trimester
O26.3 Retained intrauterine contraceptive device in pregnancy
O26.30 …… unspecified trimester
O26.31 …… first trimester
O26.32 …… second trimester
O26.33 …… third trimester
O26.4 Herpes gestationis
O26.40 …… unspecified trimester
O26.41 …… first trimester
O26.42 …… second trimester
O26.43 …… third trimester
O26.5 Maternal hypotension syndrome
O26.50 …… unspecified trimester
O26.51 …… first trimester
O26.52 …… second trimester
O26.53 …… third trimester
O26.6 Liver and biliary tract disorders in pregnancy, childbirth and the puerperium

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