DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 11

K65-K6A Diseases of peritoneum, retroperitoneum and pelvis (K65-K6A)

Block K65-K6A groups 5 categories with 21 billable codes in FY2027. 3 codes are new this year.

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K65-K6A Diseases of peritoneum, retroperitoneum and pelvis (K65-K6A)

Neighbouring blocks

Categories
5
Billable codes
21
CC codes
3
MCC codes
15
HCC V28 codes
10
New FY2027
3

Categories in K65-K6A

  • K65

    Peritonitis

    Perihepatitis → K65.8

    • 7 billable codes
    • 1 CC
    • 6 MCC
    • 7 with HCC
  • K6A

    Diseases of the pelvis, not elsewhere classified New FY2027

    Disease, diseasedpelvis, pelvic → K6A.8

    • 3 billable codes
    • 1 CC
    • 2 MCC
    • 3 new
  • K66

    Other disorders of peritoneum

    Hemoperitoneum → K66.1

    • 4 billable codes
    • 1 MCC
  • K67

    Disorders of peritoneum in infectious diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 MCC
    • 1 with HCC
  • K68

    Disorders of retroperitoneum

    Retroperitonitis → K68.9

    • 6 billable codes
    • 1 CC
    • 5 MCC
    • 2 with HCC

FY2027 changes in K65-K6A

  • K6A.01 Prevesical abscess New FY2027
  • K6A.09 Other pelvic abscess New FY2027
  • K6A.8 Other diseases of the pelvis, not elsewhere classified New FY2027

Index main terms

  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) → K65, K68, K6A (29 entries)
  • Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) → K65 (25 entries)
  • Necrosis, necrotic (ischemic) → K65 (7 entries)
  • Hemorrhage, hemorrhagic (concealed) → K66, K68 (6 entries)
  • Adhesions, adhesive (postinfective) → K66 (4 entries)
  • Cyst (colloid) (mucous) (simple) (retention) → K66, K68 (4 entries)
  • Disease, diseased → K66, K6A (4 entries)
  • Hematoma (traumatic) (skin surface intact) → K66, K68, K6A (4 entries)
  • Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) → K65, K68 (2 entries)
  • Fat → K65 (2 entries)
  • Fibrosis, fibrotic → K65, K68 (2 entries)
  • Granuloma → K66 (2 entries)
  • Hemoperitoneum → K65, K66 (2 entries)
  • Mesenteritis → K65 (2 entries)
  • Rupture, ruptured → K65, K66 (2 entries)

+17 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.