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O85 vs O98.8

O85 (Puerperal sepsis) compared with O98.8 (Other maternal infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because O98.8 lists O85 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.O85 is “Puerperal sepsis”; O98.8 is “Other maternal infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium”. O98.8 is a non-billable header; O85 is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.O98.8 lists O85 under Excludes2: “puerperal sepsis (O85)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. O85 carries 3 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.O98.8’s tabular entry: “puerperal sepsis (O85)”. The note covers O85.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.O98.8 is a non-billable header, but O85 is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

O98.8
Other maternal infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium
↔
O85
Puerperal sepsis

What we found

Yes, when both are documented.O98.8 carries an Excludes2 note covering O85: “puerperal sepsis (O85)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

O85Puerperal sepsisO98.8Other maternal infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium
Billing statusBillableNon-billable header

Report instead: O98.811, O98.812, O98.813, O98.819, O98.82

ClassificationO00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)
DefinitionPuerperal sepsis is a billable ICD-10-CM diagnosis code (O85).Other maternal infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium is a non-billable ICD-10-CM category code (O98.8).
Includes
Postpartum sepsis
Puerperal peritonitis
Puerperal pyemia
the listed conditions when complicating the pregnant state, when aggravated by the pregnancy, or as a reason for obstetric care
Excludes1
fever of unknown origin following delivery (O86.4)
obstetric pyemic and septic embolism (O88.3-)
puerperal septic thrombophlebitis (O86.81)
—
Excludes2
genital tract infection following delivery (O86.1-)
sepsis during labor (O75.3)
urinary tract infection following delivery (O86.2-)
mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
puerperal osteomalacia (M83.0)
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
code (B95-B97), to identify infectious agent
code (R65.2-) to identify severe sepsis, if applicable
code (Chapter 1), to identify specific infectious or parasitic disease

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources