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O30.831 ICD-10-CM Code: Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, first trimester

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
1 code-also instruction

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

  • MS-DRG 817 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 818 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 819 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)
  • MS-DRG 831 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 832 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 833 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for O30.831 in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on O30.831 itself; “inherited from” names the category or block whose note applies here.

Code Also

Additional codes that may be required to fully describe the encounter.

  • any complications specific to multiple gestation

Source: inherited from O30

Coder workflow for O30.831

MedCoder structured workflow — derived from this code’s own official record

Before you code O30.831

  1. “Other” (NEC) means the condition is specified in the record but no dedicated code captures it. Confirm the documented form is not one a sibling code names before settling on O30.831; if the record states no specifics at all, the unspecified sibling applies instead. “Other” codes are for documented conditions the classification gives no specific code; “unspecified” codes are for records lacking the detail (Guidelines I.A.9.a, I.A.9.b).

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

  2. Confirm the condition is documented as complicating the pregnancy, childbirth, or the puerperium, and check the trimester where the code carries one and the fetus character where the category requires it. Chapter 15 codes belong on the maternal record only and take sequencing priority over codes from other chapters. It is the provider’s responsibility to state that a condition is not affecting the pregnancy; the trimester is assigned from the documentation (Guidelines I.C.15.a, I.C.15.a.1, I.C.15.a.3).

    Guide: How to choose an ICD-10-CM code →

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Trimester
Assigned from the documented trimester at the encounter, or the trimester in which the condition developed for inpatient stays (Guidelines I.C.15.a.3).
Any detail beyond this code’s title
What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Code Also — related condition(1 note)

    Coding workflow: Review the related condition when both are documented and the instruction applies. A Code Also note does not fix sequencing; the order follows the circumstances of the encounter.

    See the official tabular notes · Guidelines I.A.17

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, first trimester is a billable ICD-10-CM diagnosis code (O30.831).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Verify Before Coding

  • Age-restricted: the Medicare Code Editor lists this as a maternity (age 9-64) diagnosis; other ages are presumed incorrect.
  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

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

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name O30.831 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 10 Excludes2 notes: O20 — Hemorrhage in early pregnancy (via O30.-), O20-O29 — Other maternal disorders predominantly related to pregnancy (O20-O29) (via O30.-), O21 — Excessive vomiting in pregnancy (via O30.-), O22 — Venous complications and hemorrhoids in pregnancy (via O30.-), O23 — Infections of genitourinary tract in pregnancy (via O30.-), O24 — Diabetes mellitus in pregnancy, childbirth, and the puerperium (via O30.-), O25 — Malnutrition in pregnancy, childbirth and the puerperium (via O30.-), O26 — Maternal care for other conditions predominantly related to pregnancy (via O30.-), O28 — Abnormal findings on antenatal screening of mother (via O30.-), O29 — Complications of anesthesia during pregnancy (via O30.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 178 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 6 MS-DRGs: DRG 817 (MDC 14), DRG 818 (MDC 14), DRG 819 (MDC 14), DRG 831 (MDC 14), DRG 832 (MDC 14), DRG 833 (MDC 14).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):PRG012 — Multiple gestation (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as CC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

O30.131 — Triplet pregnancy, trichorionic/triamniotic, first trimester, O30.132 — Triplet pregnancy, trichorionic/triamniotic, second trimester, O30.133 — Triplet pregnancy, trichorionic/triamniotic, third trimester, O30.139 — Triplet pregnancy, trichorionic/triamniotic, unspecified trimester, O30.231 — Quadruplet pregnancy, quadrachorionic/quadra-amniotic, first trimester, O30.232 — Quadruplet pregnancy, quadrachorionic/quadra-amniotic, second trimester, O30.233 — Quadruplet pregnancy, quadrachorionic/quadra-amniotic, third trimester, O30.239 — Quadruplet pregnancy, quadrachorionic/quadra-amniotic, unspecified trimester, O30.832 — Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, second trimester, O30.833 — Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, third trimester, O30.839 — Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, unspecified trimester, O30.90 — Multiple gestation, unspecified, unspecified trimester, O30.91 — Multiple gestation, unspecified, first trimester, O30.92 — Multiple gestation, unspecified, second trimester, O30.93 — Multiple gestation, unspecified, third trimester, O31.10X0 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, not applicable or unspecified, O31.10X1 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 1, O31.10X2 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 2, O31.10X3 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 3, O31.10X4 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 4, +157 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Multiple gestation).

O30.803 — Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, third trimester, O30.809 — Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester, O30.811 — Other specified multiple gestation with two or more monochorionic fetuses, first trimester, O30.812 — Other specified multiple gestation with two or more monochorionic fetuses, second trimester, O30.813 — Other specified multiple gestation with two or more monochorionic fetuses, third trimester, O30.819 — Other specified multiple gestation with two or more monochorionic fetuses, unspecified trimester, O30.821 — Other specified multiple gestation with two or more monoamniotic fetuses, first trimester, O30.822 — Other specified multiple gestation with two or more monoamniotic fetuses, second trimester, O30.823 — Other specified multiple gestation with two or more monoamniotic fetuses, third trimester, O30.829 — Other specified multiple gestation with two or more monoamniotic fetuses, unspecified trimester, O30.832 — Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, second trimester, O30.833 — Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, third trimester, O30.839 — Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, unspecified trimester, O30.891 — Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, first trimester, O30.892 — Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, second trimester, O30.893 — Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, third trimester, O30.899 — Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, unspecified trimester, O30.90 — Multiple gestation, unspecified, unspecified trimester, O30.91 — Multiple gestation, unspecified, first trimester, O30.92 — Multiple gestation, unspecified, second trimester, +207 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

HbA1c Test (Glycated Hemoglobin), Blood Glucose Test, Gamma-glutamyl Transferase (GGT) Test, Lipid Panel

Contextual Map

Every relationship of O30.831 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.

Run O30.831 with these 8 related codes in Claim Check

Hierarchy

Referenced by Excludes2 notes (10)

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 14 — Pregnancy, Childbirth and the Puerperium[MDC crossing]: “Pregnancy, Childbirth and the Puerperium — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 94 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Nearest codes (40)

Change history

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Change history

  • FY2019 — October 1, 2018
    Added to the code set
    Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, first trimester
    FY2019 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O30.831 in its code family, with their registry titles.

View all codes in the O30 family