DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K52 Other and unspecified noninfective gastroenteritis and colitis

  • Header · not billable

K52 is not billable. The category heads 14 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K50-K52 Noninfective enteritis and colitis (K50-K52)
  3. K52 Other and unspecified noninfective gastroenteritis and colitis
Billable codes
14
Subdivisions
6
CC / MCC codes
2 / 0
HCC V28 codes
0
New FY2027
0
Index entries
93

Codes in K52

  1. K52.0
    Gastroenteritis and colitis due to radiation
    BillableCC
  2. K52.1
    Toxic gastroenteritis and colitis
    BillableCC
    Inclusion terms 1, Code first 1, Use additional code 1

    Inclusion terms

    • Drug-induced gastroenteritis and colitis

    Code first

    • (T51-T65) to identify toxic agent T51 T65

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50
  3. K52.2
    Allergic and dietetic gastroenteritis and colitis
    Header
    Inclusion terms 1, Excludes2 4, Use additional code 1

    Inclusion terms

    • Food hypersensitivity gastroenteritis or colitis

    Excludes2

    • allergic eosinophilic colitis (K52.82) K52.82
    • allergic eosinophilic esophagitis (K20.0) K20.0
    • allergic eosinophilic gastritis (K52.81) K52.81
    • allergic eosinophilic gastroenteritis (K52.81) K52.81

    Use additional code

    • code to identify type of food allergy (Z91.01-, Z91.02-) Z91.01 Z91.02
  4. K52.21
    Food protein-induced enterocolitis syndrome
    Billable
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • FPIES

    Use additional code

    • code for hypovolemic shock, if present (R57.1) R57.1
  5. K52.22
    Food protein-induced enteropathy
    Billable
  6. K52.29
    Other allergic and dietetic gastroenteritis and colitis
    Billable
    Inclusion terms 6

    Inclusion terms

    • Allergic proctocolitis
    • Food hypersensitivity gastroenteritis or colitis
    • Food-induced eosinophilic proctocolitis
    • Food protein-induced proctocolitis
    • Immediate gastrointestinal hypersensitivity
    • Milk protein-induced proctocolitis
  7. K52.3
    Indeterminate colitis
    Billable
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Colonic inflammatory bowel disease unclassified (IBDU)

    Excludes1

    • unspecified colitis (K52.9) K52.9
  8. K52.8
    Other specified noninfective gastroenteritis and colitis
    Header
  9. K52.81
    Eosinophilic gastritis or gastroenteritis
    Billable
    Inclusion terms 1, Excludes2 1

    Inclusion terms

    • Eosinophilic enteritis

    Excludes2

    • eosinophilic esophagitis (K20.0) K20.0
  10. K52.82
    Eosinophilic colitis
    Billable
    Excludes2 5

    Excludes2

    • allergic proctocolitis (K52.29) K52.29
    • food-induced eosinophilic proctocolitis (K52.29) K52.29
    • food protein-induced enterocolitis syndrome (FPIES) (K52.21) K52.21
    • food protein-induced proctocolitis (K52.29) K52.29
    • milk protein-induced proctocolitis (K52.29) K52.29
  11. K52.83
    Microscopic colitis
    Header
  12. K52.831
    Collagenous colitis
    Billable
  13. K52.832
    Lymphocytic colitis
    Billable
  14. K52.838
    Other microscopic colitis
    Billable
  15. K52.839
    Microscopic colitis, unspecified
    Billable
  16. K52.89
    Other specified noninfective gastroenteritis and colitis
    Billable
  17. K52.9
    Noninfective gastroenteritis and colitis, unspecified
    Billable
    Inclusion terms 6, Excludes1 5

    Inclusion terms

    • Colitis NOS
    • Enteritis NOS
    • Gastroenteritis NOS
    • Ileitis NOS
    • Jejunitis NOS
    • Sigmoiditis NOS

    Excludes1

    • diarrhea NOS (R19.7) R19.7
    • functional diarrhea (K59.1) K59.1
    • infectious gastroenteritis and colitis NOS (A09) A09
    • neonatal diarrhea (noninfective) (P78.3) P78.3
    • psychogenic diarrhea (F45.8) F45.8

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 K50-K52 instructions (Includes 1, Excludes1 2): printed on the block page.

Chapter 11 instructions (Excludes2 8): printed on the chapter 11 page.

Index entries

  • Toxinfection, gastrointestinal → K52.1
  • FPIES (food protein-induced enterocolitis syndrome) → K52.21
  • IBDU (colonic inflammatory bowel dissease unclassified) → K52.3
  • Cecitis → K52.9
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) → K52.9
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) → K52.9
  • Enterocolitis → K52.9
  • Gastroenteritis (acute) (chronic) (noninfectious) → K52.9
  • Gastroenteropathy → K52.9
  • Gastrojejunitis → K52.9
  • Ileitis (chronic) (noninfectious) → K52.9
  • Ileocolitis → K52.9
  • Sigmoiditis → K52.9
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)due to radiation → K52.0
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)radiation → K52.0
  • Enterocolitisradiation → K52.0
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)drug-induced → K52.1
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)toxic NEC → K52.1
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)drug-induced → K52.1
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)toxic → K52.1
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)drug-induced → K52.1
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)toxic NEC → K52.1
  • Gastroenteritis (acute) (chronic) (noninfectious)drug-induced → K52.1
  • Gastroenteritis (acute) (chronic) (noninfectious)toxic → K52.1
  • Intoxicationalimentary canal → K52.1
  • Intoxicationenteric → K52.1
  • Intoxicationgastrointestinal → K52.1
  • Toxemiagastrointestinal → K52.1
  • Toxemiaintestinal → K52.1
  • Toxemiasmall intestine → K52.1
  • Syndromefood protein-induced enterocolitis (FPIES) → K52.21
  • Enteropathyfood protein-induced → K52.22
  • Allergy, allergic (reaction) (to)colitis → K52.29
  • Allergy, allergic (reaction) (to)proctocolitis → K52.29
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)allergic → K52.29
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)dietetic → K52.29
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)food hypersensitivity → K52.29
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)allergic → K52.29
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)dietetic → K52.29
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)allergic → K52.29

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