DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q93 Monosomies and deletions from the autosomes, not elsewhere classified

  • Header · not billable

Q93 is not billable. The category heads 14 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q90-Q99 Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
  3. Q93 Monosomies and deletions from the autosomes, not elsewhere classified
Billable codes
14
Subdivisions
9
CC / MCC codes
10 / 1
HCC V28 codes
0
New FY2027
0
Index entries
42

Codes in Q93

  1. Q93.0
    Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction)
    BillableExempt
  2. Q93.1
    Whole chromosome monosomy, mosaicism (mitotic nondisjunction)
    BillableExempt
  3. Q93.2
    Chromosome replaced with ring, dicentric or isochromosome
    BillableExempt
  4. Q93.3
    Deletion of short arm of chromosome 4
    BillableCCExempt
    Inclusion terms 1

    Inclusion terms

    • Wolff-Hirschorn syndrome
  5. Q93.4
    Deletion of short arm of chromosome 5
    BillableCCExempt
    Inclusion terms 1

    Inclusion terms

    • Cri-du-chat syndrome
  6. Q93.5
    Other deletions of part of a chromosome
    Header
  7. Q93.51
    Angelman syndrome
    BillableCCExempt
  8. Q93.52
    Phelan-McDermid syndrome
    BillableCCExempt
    Inclusion terms 1, Use additional code 5

    Inclusion terms

    • 22q13.3 deletion syndrome

    Use additional code

    • code(s) to identify any associated conditions, such as:
    • autism spectrum disorder (F84.0) F84.0
    • degree of intellectual disabilities (F70-F79) F70 F79
    • epilepsy and recurrent seizures (G40.-) G40
    • lymphedema (I89.0) I89.0
  9. Q93.59
    Other deletions of part of a chromosome
    BillableCCExempt
  10. Q93.7
    Deletions with other complex rearrangements
    BillableCCExempt
    Inclusion terms 1, Code also 1

    Inclusion terms

    • Deletions due to unbalanced translocations, inversions and insertions

    Code also

    • any associated duplications due to unbalanced translocations, inversions and insertions (Q92.5) Q92.5
  11. Q93.8
    Other deletions from the autosomes
    Header
  12. Q93.81
    Velo-cardio-facial syndrome
    BillableMCCExempt
    Inclusion terms 1

    Inclusion terms

    • Deletion 22q11.2
  13. Q93.82
    Williams syndrome
    BillableCCExempt
  14. Q93.88
    Other microdeletions
    BillableCCExempt
    Inclusion terms 2

    Inclusion terms

    • Miller-Dieker syndrome
    • Smith-Magenis syndrome
  15. Q93.89
    Other deletions from the autosomes
    BillableCCExempt
    Inclusion terms 3

    Inclusion terms

    • Deletions identified by fluorescence in situ hybridization (FISH)
    • Deletions identified by in situ hybridization (ISH)
    • Deletions seen only at prometaphase
  16. Q93.9
    Deletion from autosomes, unspecified
    BillableCCExempt

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Block Q90-Q99 instructions (Excludes2 1): printed on the block page.

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Replaced chromosome by dicentric ring → Q93.2
  • Wolff-Hirschorn syndrome → Q93.3
  • Cri-du-chat syndrome → Q93.4
  • Angelman syndrome → Q93.51
  • Happy puppet syndrome → Q93.51
  • Phelan-McDermid syndrome → Q93.52
  • Williams syndrome → Q93.82
  • Microdeletions NEC → Q93.88
  • Monosomy → Q93.9
  • Syndromechromosome 4 short arm deletion → Q93.3
  • Catcry syndrome → Q93.4
  • Syndromecat cry → Q93.4
  • Syndromechromosome 5 short arm deletion → Q93.4
  • Syndromecri-du-chat → Q93.4
  • SyndromeAngelman → Q93.51
  • Syndromehappy puppet → Q93.51
  • Syndrome22q13.3 deletion → Q93.52
  • SyndromePhelan-McDermid → Q93.52
  • Syndromevelo-cardio-facial → Q93.81
  • SyndromeWilliams → Q93.82
  • Deletion(s)microdeletions NEC → Q93.88
  • SyndromeMiller-Dieker → Q93.88
  • SyndromeSmith-Magenis → Q93.88
  • Deletion(s)long arm chromosome 18 or 21 → Q93.89
  • Monosomyspecified NEC → Q93.89
  • Syndromelong arm 18 or 21 deletion → Q93.89
  • Deletion(s)autosome → Q93.9
  • Monosomywhole chromosomemeiotic nondisjunction → Q93.0
  • Monosomywhole chromosomemitotic nondisjunction → Q93.1
  • Monosomywhole chromosomemosaicism → Q93.1
  • Abnormal, abnormality, abnormalitieschromosome, chromosomaldicentric replacement → Q93.2
  • Abnormal, abnormality, abnormalitieschromosome, chromosomalring replacement → Q93.2
  • Deletion(s)chromosomepart of NEC → Q93.59
  • Deletion(s)chromosomewith complex rearrangements NEC → Q93.7
  • Deletion(s)long arm chromosome 18 or 21with complex rearrangements NEC → Q93.7
  • Deletion(s)autosomeidentified by fluorescence in situ hybridization (FISH) → Q93.89
  • Deletion(s)autosomeidentified by in situ hybridization (ISH) → Q93.89
  • Deletion(s)chromosomeseen only at prometaphase → Q93.89
  • Deletion(s)chromosomespecified NEC → Q93.89
  • Deletion(s)chromosomeshort arm4 → Q93.3

2 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy