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O36.823 vs O77

O36.823 (Fetal anemia and thrombocytopenia, third trimester) compared with O77 (Other fetal stress complicating labor and delivery), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because O36.823 lists O77 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.O36.823 is “Fetal anemia and thrombocytopenia, third trimester”; O77 is “Other fetal stress complicating labor and delivery”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.O36.823 lists O77 under Excludes2: “labor and delivery complicated by fetal stress (O77.-)”. 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. O36.823 carries 2 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.O36.823’s tabular entry: “labor and delivery complicated by fetal stress (O77.-)”. The note covers O77.

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

O36.823
Fetal anemia and thrombocytopenia, third trimester
↔
O77
Other fetal stress complicating labor and delivery

What we found

Yes, when both are documented.O36.823 carries an Excludes2 note covering O77: “labor and delivery complicated by fetal stress (O77.-)”

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 FY2027

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

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
O36.823

Fetal anemia and thrombocytopenia, third trimester

O77

Other fetal stress complicating labor and delivery

StatusDiffers
O36.823
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: O36.8230, O36.8231, O36.8232, O36.8233, O36.8234

O77
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: O77.0, O77.1, O77.8, O77.9

Excludes1Differs
O36.823
  • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
  • placental transfusion syndromes (O43.0-)
O77

None at this code

Excludes2Differs
O36.823
  • labor and delivery complicated by fetal stress (O77.-)
O77

None at this code

CategoryDiffers
O36.823

O36 Maternal care for other fetal problems

O77

Is itself a category

ChapterSame for both

O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)

IncludesDiffers
O36.823
  • the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
O77

None at this code

7th characterDiffers
O36.823
  • One of the following 7th characters is to be assigned to each code under category O36. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O36 that has a 7th character of 1 through 9.
O77

None at this code

No Code first, Use additional code and Code also note at either code.

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. In a row that differs, notes every code shares are dimmed.

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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