DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K27 Peptic ulcer, site unspecified

  • Header · not billable

K27 is not billable. The category heads 9 billable codes in FY2027: the 9 codes directly below it.

Index → code

  • Lesion(s) (nontraumatic)peptic → K27.9
  • Melenawith ulcer - code by site under Ulcer, with hemorrhage → K27.4
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativebleeding → K27.4

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31)
  3. K27 Peptic ulcer, site unspecified
Billable codes
9
Subdivisions
9
CC / MCC codes
1 / 6
HCC V28 codes
4
New FY2027
0
Index entries
18

Codes in K27

  1. K27.0
    Acute peptic ulcer, site unspecified, with hemorrhage
    BillableMCC
  2. K27.1
    Acute peptic ulcer, site unspecified, with perforation
    BillableMCC78
  3. K27.2
    Acute peptic ulcer, site unspecified, with both hemorrhage and perforation
    BillableMCC78
  4. K27.3
    Acute peptic ulcer, site unspecified, without hemorrhage or perforation
    BillableCC
  5. K27.4
    Chronic or unspecified peptic ulcer, site unspecified, with hemorrhage
    BillableMCC
  6. K27.5
    Chronic or unspecified peptic ulcer, site unspecified, with perforation
    BillableMCC78
  7. K27.6
    Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforation
    BillableMCC78
  8. K27.7
    Chronic peptic ulcer, site unspecified, without hemorrhage or perforation
    Billable
  9. K27.9
    Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation
    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

At K27

Includes

  • gastroduodenal ulcer NOS
  • peptic ulcer NOS

Excludes1

  • peptic ulcer of newborn (P78.82) P78.82

Use additional code

  • code to identify:
  • alcohol abuse and dependence (F10.-) F10

Notes that also apply

Block K20-K31 instructions (Excludes2 1): printed on the block page.

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

Index entries

  • Hematemesiswith ulcer - code by site under Ulcer, with hemorrhage → K27.4
  • Hemorrhage, hemorrhagic (concealed)ulcer - code by site under Ulcer, with hemorrhage → K27.4
  • Melenawith ulcer - code by site under Ulcer, with hemorrhage → K27.4
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativebleeding → K27.4
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativeperforating → K27.5
  • Lesion(s) (nontraumatic)peptic → K27.9
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified) → K27.9
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)acute → K27.3
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)chronic → K27.7
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)withhemorrhage → K27.4
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)withperforation → K27.5
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)acutewithhemorrhage → K27.0
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)acutewithperforation → K27.1
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)chronicwithhemorrhage → K27.4
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)chronicwithperforation → K27.5
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)withhemorrhageand perforation → K27.6
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)acutewithhemorrhageand perforation → K27.2
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativepeptic (site unspecified)chronicwithhemorrhageand perforation → K27.6

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

Hierarchy