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Q92.2 ICD-10-CM Code: Partial trisomy

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

Coding at a Glance

Tabular directives
3 inclusion terms · 2 Excludes1 · 1 Excludes2
Risk adjustment
RxHCC V08 category 148

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 951 — OTHER FACTORS INFLUENCING HEALTH STATUS (MDC 23)

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 Q92.2 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on Q92.2 itself; “inherited from” names the category or block whose note applies here.

Includes

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

  • unbalanced translocations and insertions

Source: inherited from Q92

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Less than whole arm duplicated
  • Whole arm or more duplicated

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.

Source: inherited from Q90-Q99

Coder workflow for Q92.2

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

Before you code Q92.2

  1. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with Q92.2. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in Q92.2’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewQ92.5

Consider Q92.2. Then confirm the code is valid for the date of service in the Verify section.

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).

Official instructions as workflow

  • Excludes1 — check before selecting Q92.2(2 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with Q92.2: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareQ92.5

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of Q92.2(1 note)

    Coding workflow: The conditions named in this note are not included in Q92.2. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareE88.4

    See the official tabular notes · Guidelines I.A.12.b

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition Q92.2 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewQ92.5

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

Partial trisomy is a billable ICD-10-CM diagnosis code (Q92.2).

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

Indexed Clinical Terms (1)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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 Q92.2 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 Excludes1 notes across 3 chapters: E25 — Adrenogenital disorders (via Q92.-), Q50 — Congenital malformations of ovaries, fallopian tubes and broad ligaments (via Q92.-), Q50-Q56 — Congenital malformations of genital organs (Q50-Q56) (via Q92.-), Q51 — Congenital malformations of uterus and cervix (via Q92.-), Q52 — Other congenital malformations of female genitalia (via Q92.-), Q53 — Undescended and ectopic testicle (via Q92.-), Q54 — Hypospadias (via Q92.-), Q55 — Other congenital malformations of male genital organs (via Q92.-), Q56 — Indeterminate sex and pseudohermaphroditism (via Q92.-), Z15 — Genetic susceptibility to disease (via Q92.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Code First instruction: D84.81 — Immunodeficiency due to conditions classified elsewhere (via Q92.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 1 MS-DRG: DRG 951 (MDC 23).

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

Clinical classification (AHRQ CCSR):MAL009 — Chromosomal abnormalities (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 category (CCSR)

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

Q91.0 — Trisomy 18, nonmosaicism (meiotic nondisjunction), Q91.1 — Trisomy 18, mosaicism (mitotic nondisjunction), Q91.2 — Trisomy 18, translocation, Q91.3 — Trisomy 18, unspecified, Q91.4 — Trisomy 13, nonmosaicism (meiotic nondisjunction), Q91.5 — Trisomy 13, mosaicism (mitotic nondisjunction), Q91.6 — Trisomy 13, translocation, Q91.7 — Trisomy 13, unspecified, Q92.0 — Whole chromosome trisomy, nonmosaicism (meiotic nondisjunction), Q92.1 — Whole chromosome trisomy, mosaicism (mitotic nondisjunction), Q92.5 — Duplications with other complex rearrangements, Q92.61 — Marker chromosomes in normal individual, Q92.62 — Marker chromosomes in abnormal individual, Q92.7 — Triploidy and polyploidy, Q92.8 — Other specified trisomies and partial trisomies of autosomes, Q92.9 — Trisomy and partial trisomy of autosomes, unspecified, Q93.0 — Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction), Q93.1 — Whole chromosome monosomy, mosaicism (mitotic nondisjunction), Q93.2 — Chromosome replaced with ring, dicentric or isochromosome, Q93.3 — Deletion of short arm of chromosome 4, +56 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Trisomy”; these codes share that main term but sit in a different category of the Tabular List.

Q90.0 — Trisomy 21, nonmosaicism (meiotic nondisjunction) (21, meiotic nondisjunction), Q90.1 — Trisomy 21, mosaicism (mitotic nondisjunction) (21, mosaicism), Q90.2 — Trisomy 21, translocation (21, translocation), Q90.9 — Down syndrome, unspecified (21), Q91.0 — Trisomy 18, nonmosaicism (meiotic nondisjunction) (18, meiotic nondisjunction), Q91.1 — Trisomy 18, mosaicism (mitotic nondisjunction) (18, mosaicism), Q91.2 — Trisomy 18, translocation (18, translocation), Q91.3 — Trisomy 18, unspecified (18), Q91.4 — Trisomy 13, nonmosaicism (meiotic nondisjunction) (13, meiotic nondisjunction), Q91.5 — Trisomy 13, mosaicism (mitotic nondisjunction) (13, mosaicism), Q91.6 — Trisomy 13, translocation (13, translocation), Q91.7 — Trisomy 13, unspecified (13)

Contextual Map

Every relationship of Q92.2 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 Q92.2 with these 10 related codes in Claim Check

Hierarchy

Excludes1

Referenced by Excludes1 notes (10)

Referenced by Code First instructions

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — 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. 1,235 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Trisomy (syndrome), chromosome specified NEC, partial[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (10)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

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

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "Q92.2 — Partial trisomy." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/q92.2-partial-trisomy

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Partial trisomy

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Q92.2 in its code family, with their registry titles.

View all codes in the Q92 family