DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K63 Other diseases of intestine

  • Header · not billable

K63 is not billable. The category heads 14 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K55-K64 Other diseases of intestines (K55-K64)
  3. K63 Other diseases of intestine
Billable codes
14
Subdivisions
8
CC / MCC codes
3 / 2
HCC V28 codes
1
New FY2027
0
Index entries
127

Codes in K63

  1. K63.0
    Abscess of intestine
    BillableCC
    Excludes1 3, Excludes2 2

    Excludes1

    Excludes2

    • abscess of anal and rectal regions (K61.-) K61
    • abscess of appendix (K35.3-) K35.3
  2. K63.1
    Perforation of intestine (nontraumatic)
    BillableMCC78
    Inclusion terms 1, Excludes1 2, Excludes2 1

    Inclusion terms

    • Perforation (nontraumatic) of rectum

    Excludes1

    • perforation (nontraumatic) of duodenum (K26.-) K26
    • perforation (nontraumatic) of intestine with diverticular disease (K57.0, K57.2, K57.4, K57.8) K57.0 K57.2 K57.4 K57.8

    Excludes2

    • perforation (nontraumatic) of appendix (K35.2-, K35.3-) K35.2 K35.3
  3. K63.2
    Fistula of intestine
    BillableCC
    Excludes1 3, Excludes2 4, Code also 1

    Excludes1

    Excludes2

    • fistula of anal and rectal regions (K60.-) K60
    • fistula of appendix (K38.3) K38.3
    • intestinal-genital fistula, female (N82.2-N82.4) N82.2 N82.4
    • vesicointestinal fistula (N32.1) N32.1

    Code also

    • , if applicable, disruption of internal operation (surgical) wound (T81.32-) T81.32
  4. K63.3
    Ulcer of intestine
    BillableCC
    Inclusion terms 1, Excludes1 8

    Inclusion terms

    • Primary ulcer of small intestine

    Excludes1

    • duodenal ulcer (K26.-) K26
    • gastrointestinal ulcer (K28.-) K28
    • gastrojejunal ulcer (K28.-) K28
    • jejunal ulcer (K28.-) K28
    • peptic ulcer, site unspecified (K27.-) K27
    • ulcer of intestine with perforation (K63.1) K63.1
    • ulcer of anus or rectum (K62.6) K62.6
    • ulcerative colitis (K51.-) K51
  5. K63.4
    Enteroptosis
    Billable
  6. K63.5
    Polyp of colon
    Billable
    Excludes2 3

    Excludes2

    • adenomatous polyp of colon (D12.-) D12
    • inflammatory polyp of colon (K51.4-) K51.4
    • polyposis of colon (D12.6) D12.6
  7. K63.8
    Other specified diseases of intestine
    Header
  8. K63.81
    Dieulafoy lesion of intestine
    BillableMCC
    Excludes2 1

    Excludes2

    • Dieulafoy lesion of stomach and duodenum (K31.82) K31.82
  9. K63.82
    Intestinal microbial overgrowth
    Header
  10. K63.821
    Small intestinal bacterial overgrowth
    Header
  11. K63.8211
    Small intestinal bacterial overgrowth, hydrogen-subtype
    Billable
  12. K63.8212
    Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
    Billable
  13. K63.8219
    Small intestinal bacterial overgrowth, unspecified
    Billable
  14. K63.822
    Small intestinal fungal overgrowth
    Billable
  15. K63.829
    Intestinal methanogen overgrowth, unspecified
    Billable
  16. K63.89
    Other specified diseases of intestine
    Billable
  17. K63.9
    Disease of intestine, unspecified
    Billable

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

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

Index entries

  • Stercoraceous, stercoral ulcer → K63.3
  • Coloptosis → K63.4
  • Enteroptosis → K63.4
  • Gastroenteroptosis → K63.4
  • Glénard's disease → K63.4
  • Splanchnoptosis → K63.4
  • Visceroptosis → K63.4
  • Proctosigmoiditis → K63.89
  • Rectosigmoiditis → K63.89
  • Enteropathy → K63.9
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)bowel → K63.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)colon (wall) → K63.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)fecal → K63.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)intestine, intestinal NEC → K63.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)rectovaginal septum → K63.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)sigmoid → K63.0
  • Perforation, perforated (nontraumatic) (of)bowel → K63.1
  • Perforation, perforated (nontraumatic) (of)colon → K63.1
  • Perforation, perforated (nontraumatic) (of)ileum → K63.1
  • Perforation, perforated (nontraumatic) (of)intestine NEC → K63.1
  • Perforation, perforated (nontraumatic) (of)jejunum, jejunal → K63.1
  • Perforation, perforated (nontraumatic) (of)rectum → K63.1
  • Perforation, perforated (nontraumatic) (of)sigmoid → K63.1
  • Rupture, rupturedbowel (nontraumatic) → K63.1
  • Rupture, rupturedcolon (nontraumatic) → K63.1
  • Rupture, rupturedintestine NEC (nontraumatic) → K63.1
  • Rupture, rupturedrectum (nontraumatic) → K63.1
  • Rupture, rupturedsigmoid (nontraumatic) → K63.1
  • Fistula (cutaneous)abdomen (wall) → K63.2
  • Fistula (cutaneous)abdominorectal → K63.2
  • Fistula (cutaneous)abdominosigmoidal → K63.2
  • Fistula (cutaneous)cecosigmoidal → K63.2
  • Fistula (cutaneous)cecum → K63.2
  • Fistula (cutaneous)colon → K63.2
  • Fistula (cutaneous)enterocolic → K63.2
  • Fistula (cutaneous)enterocutaneous → K63.2
  • Fistula (cutaneous)fecal → K63.2
  • Fistula (cutaneous)ileorectal or ileosigmoidal → K63.2
  • Fistula (cutaneous)ileum → K63.2
  • Fistula (cutaneous)intestine NEC → K63.2

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

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

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