Coding and coverage · ICD-10-CM
O98.9 Unspecified maternal infectious and parasitic disease complicating pregnancy, childbirth and the puerperium
Report one of the more specific codes below.
Codes under this one
Instructional notes
Chapter 15
Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
- supervision of normal pregnancy (Z34.-)
Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Notes
- 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
O98
Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
- code (Chapter 1), to identify specific infectious or parasitic disease
Includes
- the listed conditions when complicating the pregnant state, when aggravated by the pregnancy, or as a reason for obstetric care
Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) · O94-O9A Other obstetric conditions, not elsewhere classified (O94-O9A)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.