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O36.23 ICD-10-CM Code: Maternal care for hydrops fetalis, third trimester

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Maternal care for hydrops fetalis, third trimester is a non-billable ICD-10-CM category code (O36.23). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for O36.23 in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

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

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Frequently Compared Codes

The official Excludes notes on O36.23 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

  • Not billable as written — a more specific code is required: O36.23X0, O36.23X1, O36.23X2, O36.23X3, O36.23X4.
  • Requires a 7th character. "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." Options: O36.23X0, O36.23X1, O36.23X2, O36.23X3, O36.23X4, O36.23X5

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Relationships & Classification

Official ICD-10-CM tabular notes on other codes that name O36.23 or its code family.

1 Excludes1 notes: Z03.7 (via O36.-).

Contextual Map

Every relationship of O36.23 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • O00-O9A — Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A) (O00-O9A) [Hierarchy]
  • O30-O48 — Maternal care related to the fetus and amniotic cavity and possible delivery problems [Hierarchy]
  • O36 — Clinical Diagnosis [Hierarchy]
  • O36.2 — Clinical Diagnosis [Hierarchy]

Referenced by Excludes1 notes

  • Z03.7 — Encounter for suspected maternal and fetal conditions ruled out [Excludes1](via O36.-): “known or suspected fetal anomalies affecting management of mother, not ruled out (O26.-, O35.-, O36.-, O40.-, O41.-)” · check together

Nearest codes (40)

  • O36 — Maternal care for other fetal problems [Sibling]
  • O36.20X3 — Maternal care for hydrops fetalis, unspecified trimester, fetus 3 [Sibling]
  • O36.20X4 — Maternal care for hydrops fetalis, unspecified trimester, fetus 4 [Sibling]
  • O36.20X5 — Maternal care for hydrops fetalis, unspecified trimester, fetus 5 [Sibling]
  • O36.20X9 — Maternal care for hydrops fetalis, unspecified trimester, other fetus [Sibling]
  • O36.21 — Maternal care for hydrops fetalis, first trimester [Sibling]
  • O36.21X0 — Maternal care for hydrops fetalis, first trimester, not applicable or unspecified [Sibling]
  • O36.21X1 — Maternal care for hydrops fetalis, first trimester, fetus 1 [Sibling]
  • and 32 more

Frequently Asked Questions (FAQ) & Clinical Guidance

Can O36.23 be billed directly?

No. O36.23 (Maternal care for hydrops fetalis, third trimester) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does O36.23 require a 7th character?

Yes. 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..

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O36.23 in its code family, with their registry titles.

  • O36.22X2 — Maternal care for hydrops fetalis, second trimester, fetus 2
  • O36.22X3 — Maternal care for hydrops fetalis, second trimester, fetus 3
  • O36.22X4 — Maternal care for hydrops fetalis, second trimester, fetus 4
  • O36.22X5 — Maternal care for hydrops fetalis, second trimester, fetus 5
  • O36.22X9 — Maternal care for hydrops fetalis, second trimester, other fetus
  • O36.23X0 — Maternal care for hydrops fetalis, third trimester, not applicable or unspecified
  • O36.23X1 — Maternal care for hydrops fetalis, third trimester, fetus 1
  • O36.23X2 — Maternal care for hydrops fetalis, third trimester, fetus 2
  • O36.23X3 — Maternal care for hydrops fetalis, third trimester, fetus 3
  • O36.23X4 — Maternal care for hydrops fetalis, third trimester, fetus 4

View all codes in the O36 family