1. ICD-10-CM Codes
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2. O00-O9A Pregnancy, childbirth and the puerperium
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3. O20-O29 Other maternal disorders predominantly related to pregnancy
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4. O26- Maternal care for other conditions predominantly related to pregnancy
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5. 2021 ICD-10-CM Diagnosis Code O26.4

2021 ICD-10-CM Diagnosis Code O26.4

Herpes gestationis

2016 2017 2018 2019 2020 2021 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 2021 edition of ICD-10-CM O26.4 became effective on October 1, 2020.
• This is the American ICD-10-CM version of O26.4 - other international versions of ICD-10 O26.4 may differ.

• 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).

• 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

• Type 1 Excludes: L12
  ICD-10-CM Diagnosis Code L12

  Pemphigoid

  2016 2017 2018 2019 2020 2021 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 2021 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 2021 Non-Billable/Non-Specific Code

  Applicable To

  • Conditions in L00-L99

  Type 2 Excludes

  • herpes gestationis (O26.4)
  • pruritic urticarial papules and plaques of pregnancy (PUPPP) (O26.86)

• Herpes, herpesvirus, herpetic B00.9
  ICD-10-CM Diagnosis Code B00.9

  Herpesviral infection, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Applicable To

  • Herpes simplex infection NOS
  • gestational, gestationis O26.4-

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