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O34 vs O99.89

O34 (Maternal care for abnormality of pelvic organs) compared with O99.89 (Other specified diseases and conditions 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 O99.89 lists O34 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.O34 is “Maternal care for abnormality of pelvic organs”; O99.89 is “Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.O99.89 lists O34 under Excludes2: “maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)”. 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.

Official rule

Is there an Excludes2 relationship?

Yes.O99.89’s tabular entry: “maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)”. The note covers O34.

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?

Both are headers.Both are non-billable headers, and neither contains the other.

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

O99.89
Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium
↔
O34
Maternal care for abnormality of pelvic organs

What we found

Yes, when both are documented.O99.89 carries an Excludes2 note covering O34: “maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)”

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

O34Maternal care for abnormality of pelvic organsO99.89Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium
Billing statusNon-billable header

Report instead: O34.00, O34.01, O34.02, O34.03, O34.10

Non-billable header

Report instead: O99.891, O99.892, O99.893

ClassificationO00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)
DefinitionMaternal care for abnormality of pelvic organs is a non-billable ICD-10-CM category code (O34).Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium is a non-billable ICD-10-CM category code (O99.89).
Includes
the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor
conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care
Excludes2—
genitourinary infections in pregnancy (O23.-)
infection of genitourinary tract following delivery (O86.1-O86.4)
malignant neoplasm complicating pregnancy, childbirth and the puerperium (O9A.1-)
maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)
postpartum acute kidney failure (O90.49)
traumatic injuries in pregnancy (O9A.2-)
when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)
Code first
any associated obstructed labor (O65.5)
—
Use additional code
code for specific condition
code to identify condition
code to identify specific condition

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