DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 11

K35-K38 Diseases of appendix (K35-K38)

Block K35-K38 groups 4 categories with 21 billable codes in FY2027.

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K35-K38 Diseases of appendix (K35-K38)

Neighbouring blocks

Categories
4
Billable codes
21
CC codes
8
MCC codes
5
HCC V28 codes
0
New FY2027
0

Categories in K35-K38

  • K35

    Acute appendicitis

    Rupture, rupturedappendix (with peritonitis) → K35.32

    • 13 billable codes
    • 8 CC
    • 5 MCC
  • K36

    Other appendicitis

    Subsiding appendicitis → K36

    • Billable, no subdivisions
  • K37

    Unspecified appendicitis

    Perityphlitis → K37

    • Billable, no subdivisions
  • K38

    Other diseases of appendix

    Mucoceleappendix → K38.8

    • 6 billable codes

Index main terms

  • Appendicitis (pneumococcal) (retrocecal) → K35, K36, K37 (48 entries)
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) → K35 (11 entries)
  • Perforation, perforated (nontraumatic) (of) → K35 (4 entries)
  • Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) → K35 (3 entries)
  • Rupture, ruptured → K35 (3 entries)
  • Disease, diseased → K38 (2 entries)
  • Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) → K35 (2 entries)
  • Adhesions, adhesive (postinfective) → K38 (1 entry)
  • Atrophy, atrophic (of) → K38 (1 entry)
  • Calculus, calculi, calculous → K38 (1 entry)
  • Colic (bilious) (infantile) (intestinal) (recurrent) (spasmodic) → K38 (1 entry)
  • Concretion → K38 (1 entry)
  • Cyst (colloid) (mucous) (simple) (retention) → K38 (1 entry)
  • Diverticulum, diverticula (multiple) → K38 (1 entry)
  • Fecalith (impaction) → K38 (1 entry)

+10 more main terms; the search box finds them by word.

Block instructions

Notes that also apply

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