Skip to main content

N70.02 vs O85

N70.02 (Acute oophoritis) compared with O85 (Puerperal sepsis), from the official CMS tabular data.

Summary

These codes should not be reported together because N70.02’s tabular entry lists O85 under Excludes1.

Official rule
What is different?

The conditions named and chapter.N70.02 is “Acute oophoritis”; O85 is “Puerperal sepsis”. N70.02 sits in N00-N99 — Diseases of the Genitourinary System (N00-N99); O85 in O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A).

Registry fact

Can these codes be reported together?

No.N70.02’s entry carries an Excludes1 note covering O85: “pregnancy, childbirth and the puerperium (O23.-, O75.3, O85, O86.-)”. Both may be reported only when the documentation shows the two conditions are unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

Yes.N70.02’s tabular entry: “pregnancy, childbirth and the puerperium (O23.-, O75.3, O85, O86.-)”. The note covers O85.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code. O85 carries 6 Excludes2 notes covering other codes; the side-by-side table quotes them.

Official rule

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?

No.Both are billable codes, 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?

Excludes1 — generally not reported together

Excludes1 conflict

N70.02
Acute oophoritis
↔
O85
Puerperal sepsis

What we found

No — do not report together.N70.02 carries an Excludes1 note covering O85: “pregnancy, childbirth and the puerperium (O23.-, O75.3, O85, O86.-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

What to review

Report one of the two. Both may be reported only when the documentation shows the two conditions are unrelated to each other.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes1 note means the two conditions are not ordinarily reported together for the same encounter, because the classification treats them as mutually exclusive forms of the same condition. The documented exception is when the two conditions are unrelated to each other.

Source / rule

CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a

Official guidance behind these answers

  • Section I.A.12.a — Excludes1 · applies to: Excludes1

    A type 1 Excludes note is a pure excludes note. It means “NOT CODED HERE!” An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition. An exception to the Excludes1 definition is the circumstance when the two conditions are unrelated to each other. If it is not clear whether the two conditions involving an Excludes1 note are related or not, query the provider. For example, code F45.8, Other somatoform disorders, has an Excludes1 note for "sleep related teeth grinding (G47.63)," because "teeth grinding" is an inclusion term under F45.8. Only one of these two codes should be assigned for teeth grinding. However psychogenic dysmenorrhea is also an inclusion term under F45.8, and a patient could have both this condition and sleep related teeth grinding. In this case, the two conditions are clearly unrelated to each other, and so it would be appropriate to report F45.8 and G47.63 together.

    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

N70.02Acute oophoritisO85Puerperal sepsis
Billing statusBillableBillable
ClassificationN00-N99 — Diseases of the Genitourinary System (N00-N99)O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)
DefinitionAcute oophoritis is a billable ICD-10-CM diagnosis code (N70.02).Puerperal sepsis is a billable ICD-10-CM diagnosis code (O85).
Includes
abscess (of) fallopian tube
abscess (of) ovary
pyosalpinx
salpingo-oophoritis
Postpartum sepsis
Puerperal peritonitis
Puerperal pyemia
Excludes1
gonococcal infection (A54.24)
tuberculous infection (A18.17)
inflammatory diseases of female pelvic organs complicating:
abortion or ectopic or molar pregnancy (O00-O07, O08.0)
pregnancy, childbirth and the puerperium (O23.-, O75.3, O85, O86.-)
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)
Use additional code
code (B95-B97), to identify infectious agent
code (B95-B97), to identify infectious agent
code (R65.2-) to identify severe sepsis, if applicable
Code also
, if applicable, pelvic abscess (K6A.0-)
—

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