O98.512 Other viral diseases complicating pregnancy, second trimester

The ICD-10-CM code for Other viral diseases complicating pregnancy, second trimester is O98.512 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O94-O9A: Other obstetric conditions, not elsewhere classified (O94-O9A)

Category O98

81 codes (60 billable)

FY2026 Status

Stable since FY2024

U.S. Hospital Utilization

• An estimated 2,110 U.S. inpatient stays in 2023 included O98.512 among the documented diagnoses.
• 640 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

COVID-19 in pregnancy sequencing (O98.5-, U07.1)

s. COVID-19 infection in pregnancy, childbirth, and the puerperium During pregnancy, childbirth or the puerperium, when COVID-19 is the reason for admission/encounter, code O98.5-, Other viral diseases complicating pregnancy, childbirth and the puerperium, should be sequenced as the principal/first-listed diagnosis, and code U07.1, COVID-19, and the appropriate codes for associated manifestation(s) should be assigned as additional diagnoses. Codes from Chapter 15 always take sequencing priority. If the reason for admission/encounter is unrelated to COVID-19 but the patient has been diagnosed with COVID-19 during the admission/encounter, the appropriate code for the reason for admission/encounter should be sequenced as the principal/first-listed diagnosis, and codes O98.5- and U07.1, as well as the appropriate codes for associated COVID-19 manifestations, should be assigned as additional diagnoses.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference O98.512 with the canonical source and edition:

O98.512 — Other viral diseases complicating pregnancy, second trimester. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/O98.512

Canonical URL: https://icd10codingpro.com/codes/O98.512