2026 ICD-10-CM Diagnosis Code Q93.2Chromosome replaced with ring, dicentric or isochromosome

ICD-10-CM Codes›Q00-Q99›Q90-Q99›Q93

ICD-10-CM Q93.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q93.2 is a billable ICD-10-CM diagnosis code for chromosome replaced with ring, dicentric or isochromosome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Chromosomal abnormalities.

Code Identity

ICD-10-CM Code
Q93.2
Billable Status
Yes — Valid for Submission
Code Describes
Chromosome replaced with ring, dicentric or isochromosome
Short Description
Chromosome replaced with ring, dicentric or isochromosome
Same as the full description in the CMS dataset.
Parent Code
Q93
Monosomies and deletions from the autosomes, not elsewhere classified

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ90-Q99Chromosomal abnormalities, not elsewhere classified
CategoryQ93Monosomies and deletions from the autosomes, not elsewhere classified
This CodeQ93.2Chromosome replaced with ring, dicentric or isochromosome

Present on Admission (POA)Billing

Q93.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dicentric chromosome
  • Isodicentric chromosome 15 syndrome
  • Ring chromosome
  • Ring chromosome 1 syndrome
  • Ring chromosome 10 syndrome
  • Ring chromosome 11 syndrome
  • Ring chromosome 12 syndrome
  • Ring chromosome 13 syndrome
  • Ring chromosome 14 syndrome
  • Ring chromosome 15 syndrome
  • Ring chromosome 16 syndrome
  • Ring chromosome 17 syndrome
  • Ring chromosome 18 syndrome
  • Ring chromosome 19 syndrome
  • Ring chromosome 2 syndrome
  • Ring chromosome 20 syndrome
  • Ring chromosome 21 syndrome
  • Ring chromosome 22 syndrome
  • Ring chromosome 3 syndrome
  • Ring chromosome 4 syndrome
  • Ring chromosome 5 syndrome
  • Ring chromosome 6 syndrome
  • Ring chromosome 7 syndrome
  • Ring chromosome 8 syndrome
  • Ring chromosome 9 syndrome
  • Ring chromosome Y syndrome

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • chromosome, chromosomal
        • dicentric replacement
    • Abnormal, abnormality, abnormalities
      • chromosome, chromosomal
        • ring replacement
    • Replaced chromosome by dicentric ring

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL009
Chromosomal abnormalities
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Ring Chromosome 22 Syndrome

    a rare condition in which the two arms of chromosome 22 are fused resulting in a ring chromosome. ring chromosome syndromes typically are characterized by developmental delay, intellectual disability, microcephaly, and dysmorphic facial features.

  • Ring Chromosome 20 Syndrome

    a rare condition in which the two arms of chromosome 20 are fused resulting in a ring chromosome. it is characterized by recurrent seizures with an onset in childhood. additional features my include microcephaly and short stature.

  • Ring Chromosome 21 Syndrome

    a rare condition in which the two arms of chromosome 21 are fused resulting in a ring chromosome. ring chromosome syndromes typically are characterized by developmental delay, intellectual disability, microcephaly, and dysmorphic facial features.

  • Ring Chromosome 14 Syndrome

    a rare condition in which the two arms of chromosome 14 are fused resulting in a ring chromosome. ring chromosome syndromes typically are characterized by developmental delay, intellectual disability, microcephaly, and dysmorphic facial features.

  • Ring Chromosome 8 Syndrome

    a rare condition in which the two arms of chromosome 8 are fused resulting in a ring chromosome. ring chromosome syndromes typically are characterized by developmental delay, intellectual disability, microcephaly, and dysmorphic facial features.

  • Ring Chromosome 13 Syndrome

    a rare condition in which the two arms of chromosome 13 are fused resulting in a ring chromosome. ring chromosome syndromes typically are characterized by developmental delay, intellectual disability, microcephaly, and dysmorphic facial features.

  • Ring Chromosome 18 Syndrome

    a rare condition in which the two arms of chromosome 18 are fused resulting in a ring chromosome. ring chromosome syndromes typically are characterized by developmental delay, intellectual disability, microcephaly, and dysmorphic facial features.

Patient EducationClinical

Genetic Disorders

Genetic disorders are health conditions caused by changes (also called mutations or variants) in your genes. Genes are parts of DNA found in your cells that carry instructions for how your body grows, develops, and functions. Many genes tell your body how to make proteins, which are needed for your body to work properly.

The full article covers:

  • What are genetic disorders?
  • What causes genetic disorders?
  • What are the types of genetic disorders?
  • What are the different ways a genetic disorder can be inherited?
  • How are genetic disorders diagnosed?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Q93.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
758.5 Autosomal anomalies NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q93.2Overview

Is Q93.2 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report chromosome replaced with ring, dicentric or isochromosome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is Q93.2 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for chromosome replaced with ring, dicentric or isochromosome on inpatient claims.

What is the ICD-9 equivalent of Q93.2?

Under the General Equivalence Mappings, chromosome replaced with ring, dicentric or isochromosome converts to ICD-9-CM 758.5 (autosomal anomalies NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.